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Pan Y, Hu J. Hormonal basis of brain fog in cancer treatment. J Exp Med 2024; 221:e20231942. [PMID: 38597926 PMCID: PMC11009970 DOI: 10.1084/jem.20231942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024] Open
Abstract
The cognitive side effects of cancer treatment are common, but no targeted therapy exists yet to treat or prevent such neurological sequelae. We explore the role of hormones as mediators between cancer therapy and cognitive impairment, discussing potential future directions.
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Affiliation(s)
- Yuan Pan
- Department of Symptom Research, University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Department of Neuro-Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jian Hu
- Department of Cancer Biology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
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Holmquist S, Stenling A, Tafvelin S, Ntoumanis N, Schéle I. Dimensionality, Invariance, and Nomological Network of the Need Satisfaction and Frustration Scale (NSFS): An Extensive Psychometric Investigation in a Swedish Work Cohort. J Pers Assess 2024; 106:396-406. [PMID: 37772753 DOI: 10.1080/00223891.2023.2258960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 09/03/2023] [Indexed: 09/30/2023]
Abstract
The present study evaluated the dimensionality, measurement invariance, and nomological network of the Need Satisfaction and Frustration Scale (NSFS) in a sample of Swedish workers. Using confirmatory factor analysis, exploratory structural equation modeling, and bifactor modeling, 30 different measurement models were evaluated cross-sectionally (n = 2123) and longitudinally (n = 1506). Measurement invariance was tested across gender and time. The nomological network of the NSFS was examined through its relations with life satisfaction and cognitive weariness. The findings supported a first-order six-factor ESEM model and measurement invariance of the Swedish version of the NSFS. Need satisfaction was positively related to life satisfaction and unrelated to cognitive weariness. Need frustration was negatively related to life satisfaction and positively related to cognitive weariness. The present study supported a six-factor structure of the Swedish NSFS, which appears suitable for assessing changes over time and gender differences in ratings.
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Affiliation(s)
- Sofie Holmquist
- Department of Applied Educational Science, Umeå University, Umeå, Sweden
| | - Andreas Stenling
- Department of Psychology, Umeå University, Umeå, Sweden
- Department of Sport Science and Physical Education, University of Agder, Kristiansand, Norway
| | | | - Nikos Ntoumanis
- Danish Centre for Motivation and Behaviour Science, University of Southern Denmark, Odense, Denmark
- School of Health and Welfare, Halmstad University, Halmstad, Sweden
| | - Ingrid Schéle
- Department of Psychology, Umeå University, Umeå, Sweden
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van der Feltz-Cornelis C, Turk F, Sweetman J, Khunti K, Gabbay M, Shepherd J, Montgomery H, Strain WD, Lip GYH, Wootton D, Watkins CL, Cuthbertson DJ, Williams N, Banerjee A. Prevalence of mental health conditions and brain fog in people with long COVID: A systematic review and meta-analysis. Gen Hosp Psychiatry 2024; 88:10-22. [PMID: 38447388 DOI: 10.1016/j.genhosppsych.2024.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/16/2024] [Accepted: 02/19/2024] [Indexed: 03/08/2024]
Abstract
OBJECTIVE Long COVID can include impaired cognition ('brain fog'; a term encompassing multiple symptoms) and mental health conditions. We performed a systematic review and meta-analysis to estimate their prevalence and to explore relevant factors associated with the incidence of impaired cognition and mental health conditions. METHODS Searches were conducted in Medline and PsycINFO to cover the start of the pandemic until August 2023. Included studies reported prevalence of mental health conditions and brain fog in adults with long COVID after clinically-diagnosed or PCR-confirmed SARS-CoV-2 infection. FINDINGS 17 studies were included, reporting 41,249 long COVID patients. Across all timepoints (3-24 months), the combined prevalence of mental health conditions and brain fog was 20·4% (95% CI 11·1%-34·4%), being lower among those previously hospitalised than in community-managed patients(19·5 vs 29·7% respectively; p = 0·047). The odds of mental health conditions and brain fog increased over time and when validated instruments were used. Odds of brain fog significantly decreased with increasing vaccination rates (p = ·000). CONCLUSIONS Given the increasing prevalence of mental health conditions and brain fog over time, preventive interventions and treatments are needed. Research is needed to explore underlying mechanisms that could inform further research in development of effective treatments. The reduced risk of brain fog associated with vaccination emphasizes the need for ongoing vaccination programs.
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Affiliation(s)
- Christina van der Feltz-Cornelis
- Department of Health Sciences, University of York, York, United Kingdom; Hull York Medical School, (HYMS), University of York, York, United Kingdom; Institute of Health Informatics, University College London, London, United Kingdom.
| | - Fidan Turk
- Department of Health Sciences, University of York, York, United Kingdom
| | - Jennifer Sweetman
- Department of Health Sciences, University of York, York, United Kingdom
| | - Kamlesh Khunti
- Diabetes Research Centre, University of Leicester, Leicester, UK
| | - Mark Gabbay
- Department of Primary Care and Mental Health University of Liverpool, Liverpool, United Kingdom
| | - Jessie Shepherd
- Department of Health Sciences, University of York, York, United Kingdom
| | - Hugh Montgomery
- Department of Medicine, University College London, London, United Kingdom
| | - W David Strain
- Diabetes and Vascular Medicine Research Centre, Institute of Clinical and Biomedical Science and College of Medicine and Health, University of Exeter, Exeter, UK
| | - Gregory Y H Lip
- Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart & Chest Hospital, Liverpool, United Kingdom; Danish Center for Health Services Research, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Dan Wootton
- Institute of Infection Veterinary and Ecological Sciences and NIHR HPRU in Emerging and Zoonotic Infections, University of Liverpool, Liverpool, United Kingdom; Liverpool University Hospitals NHS Foundation Trust, Liverpool, United Kingdom
| | - Caroline Leigh Watkins
- Lancashire Clinical Trials Unit, University of Central Lancashire, Preston, United Kingdom; School of Nursing and Midwifery, University of Central Lancashire, Preston, United Kingdom
| | - Daniel J Cuthbertson
- Institute of Cardiovascular and Metabolic Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Nefyn Williams
- Department of Primary Care and Mental Health University of Liverpool, Liverpool, United Kingdom
| | - Amitava Banerjee
- Institute of Health Informatics, University College London, London, United Kingdom; Department of Cardiology, University College London Hospitals NHS Trust, London, United Kingdom; Department of Cardiology, Barts Health NHS Trust, London, United Kingdom
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Jacquet T, Poulin-Charronnat B, Bard P, Lepers R. Effect of mental fatigue on hand force production capacities. PLoS One 2024; 19:e0298958. [PMID: 38564497 PMCID: PMC10986955 DOI: 10.1371/journal.pone.0298958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 02/01/2024] [Indexed: 04/04/2024] Open
Abstract
Mental fatigue is common in society, but its effects on force production capacities remain unclear. This study aimed to investigate the impact of mental fatigue on maximal force production, rate of force development-scaling factor (RFD-SF), and force steadiness during handgrip contractions. Fourteen participants performed two randomized sessions, during which they either carried out a cognitively demanding task (i.e., a visual attention task) or a cognitively nondemanding task (i.e., documentary watching for 62 min). The mental fatigue was evaluated subjectively and objectively (performances and electroencephalography). Maximal voluntary contraction (MVC) force, RFD-SF, and force steadiness (i.e., force coefficient of variation at submaximal intensities; 25, 50, and 75% of MVC) were recorded before and after both tasks. The feeling of mental fatigue was much higher after completing the cognitively demanding task than after documentary watching (p < .001). During the cognitively demanding task, mental fatigue was evidenced by increased errors, missed trials, and decreased N100 amplitude over time. While no effect was reported on force steadiness, both tasks induced a decrease in MVC (p = .040), a force RFD-SF lower slope (p = .011), and a reduction in the coefficient of determination (p = .011). Nevertheless, these effects were not explicitly linked to mental fatigue since they appeared both after the mentally fatiguing task and after watching the documentary. The study highlights the importance of considering cognitive engagement and mental load when optimizing motor performance to mitigate adverse effects and improve force production capacities.
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Affiliation(s)
- Thomas Jacquet
- Faculté des Sciences du Sport, CAPS, Inserm U1093, BP 27877 UFR STAPS, Université de Bourgogne, Dijon, France
| | | | - Patrick Bard
- LEAD – CNRS UMR5022, Université de Bourgogne, Dijon, France
| | - Romuald Lepers
- Faculté des Sciences du Sport, CAPS, Inserm U1093, BP 27877 UFR STAPS, Université de Bourgogne, Dijon, France
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Rosenberg R, Thorpy MJ, Doghramji K, Morse AM. Brain fog in central disorders of hypersomnolence: a review. J Clin Sleep Med 2024; 20:643-651. [PMID: 38217475 PMCID: PMC10985301 DOI: 10.5664/jcsm.11014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 01/04/2024] [Accepted: 01/04/2024] [Indexed: 01/15/2024]
Abstract
Brain fog is an undefined term describing a cluster of symptoms related to fatigue and impaired memory, attention, and concentration. Brain fog or brain fog-like symptoms have been reported in central disorders of hypersomnolence and in a range of seemingly unrelated disorders, including coronavirus disease 2019, major depressive disorder, multiple sclerosis, lupus, and celiac disease. This narrative review summarizes current evidence and proposes a consensus definition for brain fog. Brain fog is prevalent in narcolepsy and idiopathic hypersomnia, with more than three-quarters of patients with either disorder reporting this symptom in a registry study; it has also been reported as particularly difficult to treat in idiopathic hypersomnia. Studies directly evaluating brain fog are rare; tools for evaluating this symptom cluster typically are patient reports, with few objective measures validated in any disorder. Evaluating brain fog is further complicated by confounding symptoms, such as excessive daytime sleepiness, which is a hallmark of hypersomnolence disorders. No treatments specifically address brain fog. The paucity of literature, assessment tools, and medications for brain fog highlights the need for research leading to better disambiguation and treatment. Until a clear consensus definition is established, we propose brain fog in hypersomnia disorders be defined as a cognitive dysfunction that may or may not be linked with excessive sleepiness, related to an underlying neuronal dysfunction, which reduces concentration and impairs information processing, leading to a complaint of lack of clarity of mental thinking and awareness. CITATION Rosenberg R, Thorpy MJ, Doghramji K, Morse AM. Brain fog in central disorders of hypersomnolence: a review. J Clin Sleep Med. 2024;20(4):643-651.
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Affiliation(s)
| | | | - Karl Doghramji
- Jefferson Sleep Disorders Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Anne Marie Morse
- Department of Child Neurology and Sleep Medicine, Geisinger Medical Center, Janet Weis Children’s Hospital, Danville, Pennsylvania
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Graziano S, Boldrini F, Pellicano GR, Milo F, Majo F, Cristiani L, Montemitro E, Alghisi F, Bella S, Cutrera R, Fiocchi AG, Quittner A, Tabarini P. Longitudinal Effects of Elexacaftor/Tezacaftor/Ivacaftor: Multidimensional Assessment of Neuropsychological Side Effects and Physical and Mental Health Outcomes in Adolescents and Adults. Chest 2024; 165:800-809. [PMID: 37925143 DOI: 10.1016/j.chest.2023.10.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 10/01/2023] [Accepted: 10/20/2023] [Indexed: 11/06/2023] Open
Abstract
BACKGROUND Italy initiated elexacaftor/tezacaftor/ivacaftor (ETI) for people with cystic fibrosis (pwCF) in July 2021. It has led to dramatic improvements in lung function, BMI, sweat chloride, and respiratory symptoms. However, few data are available on side effects or effects on a broad range of outcomes. RESEARCH QUESTION How does ETI affect mental health, cognitive processing, neuropsychological side effects, GI symptoms, and health-related quality of life over time? STUDY DESIGN AND METHODS This was a prospective, "real-world" longitudinal study. Participants were recruited consecutively and evaluated at initiation (T0) and after 1 month, 3 months, and 6 months of starting treatment. Assessments included depression (nine-item Patient Health Questionnaire), anxiety (seven-item Generalized Anxiety Disorder), cognition (Symbol Digit Modalities Test), GI Symptom Tracker, and health-related quality of life (Cystic Fibrosis Questionnaire-Revised). Based on literature, an ad hoc questionnaire was developed to assess side effects: insomnia, headache, memory problems, "brain fog," and concentration problems. Following descriptive analyses, longitudinal data were analyzed by using mixed models for repeated measures, controlling for age and sex when appropriate. RESULTS Ninety-two consecutive pwCF (female/male, 46/46; mean age, 25.4 years) participated. FEV1 increased initially and then remained stable. BMI also increased significantly from T0 to 6 months (P < .01). Depression improved from T0 to 1 month (P < .001); however, no changes in anxiety were found. Cognitive processing improved from T0 to subsequent assessments. Positive changes were reported on the GI Symptom Tracker for stools and adherence challenges, although no changes were found for abdominal pain and digestion. Side effects occurred in 10% to 29%, with no reduction over time; insomnia increased significantly across time. Female participants reported more side effects than male participants (ie, insomnia, headache, concentration problems, brain fog). INTERPRETATION This prospective study evaluated the effects of ETI using multiple measures. Significant improvements were found in many domains; however, side effects were reported by a substantial proportion of pwCF, with no improvements over time. Female participants reported more side effects than male participants. pwCF should be followed up systematically to assess the frequency of side effects after starting this new modulator.
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Affiliation(s)
- Sonia Graziano
- Psychology Unit, Child & Adolescent Psychiatry Unit, Allergy Division, Bambino Gesù Children's Hospital IRCCS, Rome, Italy.
| | - Francesca Boldrini
- Psychology Unit, Child & Adolescent Psychiatry Unit, Allergy Division, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Gaia Romana Pellicano
- Department of Dynamic and Clinical Psychology and Health Studies, Sapienza University, Rome, Italy
| | - Francesco Milo
- Psychology Unit, Child & Adolescent Psychiatry Unit, Allergy Division, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Fabio Majo
- Pneumology and Cystic Fibrosis Unit, Allergy Division, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Luca Cristiani
- Pneumology and Cystic Fibrosis Unit, Allergy Division, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Enza Montemitro
- Pneumology and Cystic Fibrosis Unit, Allergy Division, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Federico Alghisi
- Pneumology and Cystic Fibrosis Unit, Allergy Division, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Sergio Bella
- Pneumology and Cystic Fibrosis Unit, Allergy Division, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Renato Cutrera
- Pneumology and Cystic Fibrosis Unit, Allergy Division, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Alessandro Giovanni Fiocchi
- Translational Research in Pediatric Specialties Area, Allergy Division, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | | | - Paola Tabarini
- Psychology Unit, Child & Adolescent Psychiatry Unit, Allergy Division, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
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Hagiya H, Tokumasu K, Otsuka Y, Sunada N, Nakano Y, Honda H, Furukawa M, Otsuka F. Relevance of complement immunity with brain fog in patients with long COVID. J Infect Chemother 2024; 30:236-241. [PMID: 37866620 DOI: 10.1016/j.jiac.2023.10.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 10/05/2023] [Accepted: 10/19/2023] [Indexed: 10/24/2023]
Abstract
INTRODUCTION This study aimed to elucidate the prevalence and clinical characteristics of patients with long COVID (coronavirus disease 2019), especially focusing on 50% hemolytic complement activity (CH50). METHODS This retrospective observational study focused on patients who visited Okayama University Hospital (Japan) for the treatment of long COVID between February 2021 and March 2023. CH50 levels were measured using liposome immunometric assay (Autokit CH50 Assay, FUJIFILM Wako Pure Chemical Corporation, Japan); high CH50 was defined as ≥59 U/mL. Univariate analyses assessed differences in the clinical background, long COVID symptoms, inflammatory markers, and clinical scores of patients with normal and high CH50. Logistic regression model investigated the association between high CH50 levels and these factors. RESULTS Of 659 patients who visited our hospital, 478 patients were included. Of these, 284 (59.4%) patients had high CH50 levels. Poor concentration was significantly more frequent in the high CH50 group (7.2% vs. 13.7%), whereas no differences were observed in other subjective symptoms (fatigue, headache, insomnia, dyspnea, tiredness, and brain fog). Multivariate analysis was performed on factors that could be associated with poor concentration, suggesting a significant relationship to high CH50 levels (adjusted odds ratio [aOR], 2.70; 95% confidence interval [CI], 1.33-5.49). Also, high CH50 was significantly associated with brain fog (aOR, 1.66; 95% CI, 1.04-2.66). CONCLUSIONS High CH50 levels were frequently reported in individuals with long COVID, indicating a relationship with brain fog. Future in-depth research should examine the pathological role and causal link between complement immunity and the development of long COVID.
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Affiliation(s)
- Hideharu Hagiya
- Department of Infectious Diseases, Okayama University Hospital, Okayama, 700-8558, Japan.
| | - Kazuki Tokumasu
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan
| | - Yuki Otsuka
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan
| | - Naruhiko Sunada
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan
| | - Yasuhiro Nakano
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan
| | - Hiroyuki Honda
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan
| | - Masanori Furukawa
- Clinical Laboratory, Okayama University Hospital, Okayama, 700-8558, Japan
| | - Fumio Otsuka
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan
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Marsala MJ, Christie AD. Neuromuscular behaviour in the first dorsal interosseus following mental fatigue. Exp Physiol 2024; 109:416-426. [PMID: 38130030 PMCID: PMC10988746 DOI: 10.1113/ep091349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 11/28/2023] [Indexed: 12/23/2023]
Abstract
We examined sex-specific changes to neuromuscular function in response to mental fatigue. Twenty-five young, healthy adults (13 F, 12 M) performed a mentally fatiguing task and control condition for 30 min on two separate days. Neuromuscular function was assessed in the first dorsal interosseous before and after each condition. Reaction time decreased after the mentally fatiguing task (P < 0.001, η2 = 0.47). Males and females reported higher levels of subjective fatigue after the mentally fatiguing task (P < 0.02, η2 = 0.07). Motor unit firing rate increased over time at 10% maximal voluntary contraction (MVC; P < 0.04, η2 = 0.16), and decreased over time at 50% MVC (P < 0.01, η2 = 0.14); however, this was not unique to either sex. During a variable force contraction, error decreased in females over time and increased in males (P < 0.05, η2 = 0.13), although changes were not unique to mental fatigue. Physiological function of the neuromuscular system was not specifically affected by mental fatigue in males or females.
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Affiliation(s)
- Michael J. Marsala
- School of Kinesiology, Faculty of Health SciencesThe University of Western OntarioOntarioCanada
| | - Anita D. Christie
- School of Kinesiology, Faculty of Health SciencesThe University of Western OntarioOntarioCanada
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Proost M, Habay J, DE Wachter J, DE Pauw K, Marusic U, Meeusen R, DE Bock S, Roelands B, VAN Cutsem J. The Impact of Mental Fatigue on a Strength Endurance Task: Is There a Role for the Movement-Related Cortical Potential? Med Sci Sports Exerc 2024; 56:435-445. [PMID: 37847068 DOI: 10.1249/mss.0000000000003322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
PURPOSE Several mechanisms have been proposed to explain how mental fatigue degrades sport performance. In terms of endurance performance, a role for an increased perceived exertion has been demonstrated. Using electroencephalography and, more specifically, the movement-related cortical potential (MRCP), the present study explored the neural mechanisms that could underlie the mental fatigue-associated increase in perceived exertion. METHODS Fourteen participants (age, 23 ± 2 yr; 5 women, 9 men) performed one familiarization and two experimental trials in a randomized, blinded, crossover study design. Participants had to complete a submaximal leg extension task after a mentally fatiguing task (EXP; individualized 60-min Stroop task) or control task (CON; documentary). The leg extension task consisted of performing 100 extensions at 35% of 1 repetition maximum, during which multiple physiological (heart rate, electroencephalography) and subjective measures (self-reported feeling of mental fatigue, cognitive load, behand motivation, ratings of perceived exertion) were assessed. RESULTS Self-reported feeling of mental fatigue was higher in EXP (72 ± 18) compared with CON (37 ± 17; P < 0.001). A significant decrease in flanker accuracy was detected only in EXP (from 0.96 ± 0.03% to 0.03%; P < 0.05). No significant differences between conditions were found in MRCP characteristics and perceived exertion. Specifically in EXP, alpha wave power increased during the leg extension task ( P < 0.01). CONCLUSIONS Mental fatigue did not impact the perceived exertion or MRCP characteristics during the leg extension task. This could be related to low perceived exertion and/or the absence of a performance outcome during the leg extension task. The increase in alpha power during the leg extension task in EXP suggests that participants may engage a focused internal attention mechanism to maintain performance and mitigate feelings of fatigue.
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Affiliation(s)
- Matthias Proost
- Human Physiology and Sports Physiotherapy Research Group, Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, Brussel, BELGIUM
| | | | - Jonas DE Wachter
- Human Physiology and Sports Physiotherapy Research Group, Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, Brussel, BELGIUM
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Wójcik N, Nęcka E. Working hard but not tired? The influence of task valuation on mental fatigue, effort investment, and task performance. Q J Exp Psychol (Hove) 2024; 77:656-674. [PMID: 37300497 DOI: 10.1177/17470218231183708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
It has been demonstrated in previous studies that prolonged mental effort exertion evokes mental fatigue and leads to impairments in task performance. In the current investigation, we aimed to test the hypothesis that mental fatigue depends on motivational processes and can be influenced by task valuation. In two studies, we experimentally manipulated the value of the task by financial rewards (Study 1) and the sense of autonomy (Study 2). Contrary to our predictions, those manipulations did not influence the main dependent variables. We also introduced additional rewards after prolonged effort exertion. In line with our expectations, the results showed that mental fatigue increases with time spent on effortful tasks. Importantly, however, mental fatigue decreases when the value of the task rises. This effect is accompanied by stronger effort engagement and improvement in task performance. The findings support the motivational theories of mental effort and fatigue, showing that mental fatigue might serve as a signal of diminishing value of the ongoing task.
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Affiliation(s)
- Natalia Wójcik
- Institute of Psychology, SWPS University of Social Sciences and Humanities, Krakow, Poland
| | - Edward Nęcka
- Institute of Psychology, SWPS University of Social Sciences and Humanities, Krakow, Poland
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Leaky blood-brain barrier in long-COVID-associated brain fog. Nat Neurosci 2024; 27:395-6. [PMID: 38388737 DOI: 10.1038/s41593-024-01577-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
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Filipas L, Rossi C, Codella R, Bonato M. Mental Fatigue Impairs Second Serve Accuracy in Tennis Players. Res Q Exerc Sport 2024; 95:190-196. [PMID: 37036414 DOI: 10.1080/02701367.2023.2174488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 01/25/2023] [Indexed: 06/19/2023]
Abstract
Purpose: The aim of this 2-week randomized, counterbalance and crossover study was to investigate the effect of acute mental fatigue (MF) on tennis serve performance and accuracy in tennis players. Methods: Ten male tennis players (18 ± 4 years, 1.80 ± 0.08 m; 71 ± 13 kg) were randomized to either the MF group (N = 5) that underwent an acute MF protocol or to a control (CON) group (N = 5). The MF condition consisted in a 30-min modified Stroop color word task performed before on-court serve speed test. A visual analogue scale (VAS) was used to assess the perceptions of MF and motivation toward the upcoming technical tests. Results: Reduction over baseline score of Stroop test was noted in accuracy (N < .001), but not in reaction time (N = .968) in the MF group. Increments in perceived workload were detected (N < .001) in MF group compared to CON. No differences for first and second serve speed from deuce and advantage side were observed. Increment of percentage of failed second serves from the deuce side (N = .043) in MF were detected. Conclusions: An acute MF protocol reduced tennis serve accuracy from deuce side in male tennis players. Players should avoid cognitive efforts before training sessions and matches to prevent negative effects of their technical performance.
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Affiliation(s)
- Luca Filipas
- Università degli Studi di Milano
- IRCCS MultiMedica
| | | | | | - Matteo Bonato
- Università degli Studi di Milano
- IRCCS Istituto Ortopedico Galeazzi
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Niu S, Guo J, Hanson NJ, Wang K, Chai J, Guo F. The effects of mental fatigue on fine motor performance in humans and its neural network connectivity mechanism: a dart throwing study. Cereb Cortex 2024; 34:bhae085. [PMID: 38489786 DOI: 10.1093/cercor/bhae085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 02/14/2024] [Accepted: 02/15/2024] [Indexed: 03/17/2024] Open
Abstract
While it is well known that mental fatigue impairs fine motor performance, the investigation into its neural basis remains scant. Here, we investigate the impact of mental fatigue on fine motor performance and explore its underlying neural network connectivity mechanisms. A total of 24 healthy male university students were recruited and randomly divided into two groups: a mental fatigue group (MF) and a control group (Control). Both groups completed 50 dart throws, while electroencephalography (EEG) data were collected. Following the Stroop intervention, participants in the MF group exhibited a decrease in Stroop task accuracy and throwing performance, and an increase in reaction time along with VAS and NASA scores. The EEG data during dart-throwing revealed that the network connectivity strength of theta oscillations in the frontal and left central regions was significantly higher in the MF group compared with the Control group, while the network connectivity strength of alpha oscillations in the left parietal region was significantly enhanced. The interregional connectivity within the theta and alpha rhythm bands, particularly in the frontal-central-parietal network connections, also showed a significant increase in the MF group. Mental fatigue impairs dart throwing performance and is accompanied by increased connectivity in alpha and theta.
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Affiliation(s)
- Suoqing Niu
- College of Exercise and Health, Shenyang Sport University, Shenyang 110102, China
| | - Jianrui Guo
- Laboratory Management Center, Shenyang Sport University, Shenyang 110102, China
| | - Nicholas J Hanson
- Department of Human Performance and Health Education, College of Education and Human Development, Western Michigan University, Michigan, Kalamazoo, MI 49008, United States
| | - KaiQi Wang
- College of Exercise and Health, Shenyang Sport University, Shenyang 110102, China
| | - Jinlei Chai
- College of Exercise and Health, Shenyang Sport University, Shenyang 110102, China
| | - Feng Guo
- College of Exercise and Health, Shenyang Sport University, Shenyang 110102, China
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Stanyte A, Podlipskyte A, Alonderis A, Macijauskiene J, Burkauskas J, Steibliene V. Relationship between subjective and objective fatigue and sleep characteristics in individuals with anxiety and mood disorders: An exploratory study. Physiol Behav 2024; 274:114429. [PMID: 38065423 DOI: 10.1016/j.physbeh.2023.114429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 11/30/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023]
Abstract
OBJECTIVE Fatigue and sleep disturbances are important symptoms of anxiety and mood disorders (AMD). Studies about the relationship between these variables usually rely on self-report assessments. Therefore, the aim of our exploratory study was to investigate the independent correlations between subjective and objective fatigue and sleep characteristics in individuals with AMD. METHODS In sum, 233 individuals with AMD attending a stress-related disorders day care unit (78.5 % females, mean age 39.0 years old) participated in a cross-sectional study. Participants completed the Patient Health Questionnaire-9, Generalized Anxiety Disorder-7, Multidimensional Fatigue Inventory-20, and Pittsburgh Sleep Quality Index self-report questionnaires, as well as an exercise capacity workload test for assessing objective fatigue and polysomnography monitoring for evaluation of sleep structure. RESULTS In individuals with AMD, exercise capacity workload was associated with lower percent of stage 1 sleep (β = - 0.17, p = 0.006), REM latency (β = -0.13, p = 0.042), and wake after sleep onset (β = -0.12, p = 0.039). General fatigue was associated with a higher percent of body movements (β = 0.12, p = 0.047), as well as mental fatigue was associated with a higher percent of body movements (β = 0.13, p = 0.029), and a higher score on the PSQI (β = 0.21, p = 0.002). CONCLUSIONS Objective sleep characteristics were associated with objective assessment of fatigue, while subjective sleep quality was associated with subjectively assessed mental fatigue.
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Affiliation(s)
- Agne Stanyte
- Laboratory of Behavioral Medicine, Neuroscience Institute, Lithuanian University of Health Sciences, Palanga - Kaunas, Lithuania.
| | - Aurelija Podlipskyte
- Laboratory of Behavioral Medicine, Neuroscience Institute, Lithuanian University of Health Sciences, Palanga - Kaunas, Lithuania
| | - Audrius Alonderis
- Laboratory of Behavioral Medicine, Neuroscience Institute, Lithuanian University of Health Sciences, Palanga - Kaunas, Lithuania
| | - Jurate Macijauskiene
- Department of Geriatrics, Faculty of Nursing, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Julius Burkauskas
- Laboratory of Behavioral Medicine, Neuroscience Institute, Lithuanian University of Health Sciences, Palanga - Kaunas, Lithuania
| | - Vesta Steibliene
- Laboratory of Behavioral Medicine, Neuroscience Institute, Lithuanian University of Health Sciences, Palanga - Kaunas, Lithuania
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Staiano W, Bonet LRS, Romagnoli M, Ring C. Mental fatigue impairs repeated sprint and jump performance in team sport athletes. J Sci Med Sport 2024; 27:105-112. [PMID: 37957039 DOI: 10.1016/j.jsams.2023.10.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 10/19/2023] [Accepted: 10/22/2023] [Indexed: 11/15/2023]
Abstract
OBJECTIVES We tested whether mental fatigue (MF), induced by a cognitively-demanding task, would impair repeated sprint ability (RSA) and repeated jump ability (RJA) performance, and whether physical fatigue and MF would impair psychomotor vigilance. DESIGN Randomized within-participant design. METHODS After establishing baseline peak countermovement jump (CMJ), 18 male participants performed 12 maximal 20-m (10-m linear + 10-m directional) repeated sprints (RSA random test) followed by 12 maximal repeated CMJs (RJA test) subsequent to 30-min Stroop task (MF) or a documentary (Control). Peak and mean running time and height, percent decrement score (Sdec), blood lactate, heart rate and RPE were measured for CMJ, RSA, and RJA tests. MF (M-VAS) and psychomotor vigilance [psychomotor vigilance test (PVT)] were measured at baseline, after each condition, and after the RSA/RJA tests. RESULTS Compared to Control, the Stroop task elevated MF (p = .001), RPE ratings (all p < .031), and mean and Sdec performance in directional (but not linear) RSA (all p < .032) and RJA tests (all p < .034). PVT score worsened after Stroop task (p = .011) but not Control, declined after RSA/RJA tests in both conditions (all p < .023) and was lower in the MF condition (p = .029). No condition differences were noted for peak (CMJ, RSA and RJA tests) performance, blood lactate, and heart rate. CONCLUSIONS MF impairs directional RSA, and RJA performance. This impairment was linked with increased RPE and without physiological changes. The progressive impairment in PVT score suggests a cumulatively negative effect of mental and physical fatigue on psychomotor vigilance.
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Affiliation(s)
- Walter Staiano
- Department of Physical Education and Sport, University of Valencia, Spain; Department of Psychology, Biological and Cognitive Psychology, University of Southern Denmark, Denmark.
| | | | - Marco Romagnoli
- Department of Physical Education and Sport, University of Valencia, Spain
| | - Christopher Ring
- School of Sport, Exercise & Rehabilitation Sciences, University of Birmingham, UK
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Brietzke C, Vinícius Í, Ribeiro WA, Franco-Alvarenga PE, Canestri R, Vasconcelos GC, Hettinga FJ, Santos TM, Pires FO. Carbohydrate mouth rinse improves performance of mentally fatigued cyclists despite null effects on psychological responses. Physiol Behav 2024; 274:114428. [PMID: 38065422 DOI: 10.1016/j.physbeh.2023.114428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 11/15/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023]
Abstract
Mental fatigue reduces exercise performance through an impaired psychological response such as increased perceived exertion. Carbohydrate (CHO) mouth rinses improve exercise performance and perceived exertion likely due to an improved activation in cerebral reward areas, then we investigated if the CHO mouth rinse-improved exercise performance in mentally fatigued individuals was associated with ameliorated reward-related psychological responses. We hypothesised that CHO mouth rinse would be beneficial for mentally fatigued cyclists mainly in high-metabolic disturbance intensities. After familiarization and baseline sessions, well trained cyclists (n = 20) performed a maximal incremental test (MIT) after mental fatigue induction. They completed the MIT either without mouth rinse (MF) or rinsing their mouth with CHO (MF+CHO) or placebo (FM+PLA) solutions at every 25 % of the MIT. Psychological responses such as ratings of perceived exertion (RPE), affective valence, emotional arousal, and motivation were assessed throughout the MIT, while performance was assessed as peak power output and time of exercise. Mental fatigue reduced MIT performance (P < 0.05), but CHO mouth rinse was effective to counteract this deleterious mental fatigue effect (P < 0.05). However, we found null effects of CHO mouth rinses in psychological responses above the VT2 (P > 0.05) such as RPE, affective valence, emotional arousal, and motivation. Correlational analysis showed a significant, but moderate negative correlation between motivation and time of exercise above the VT2 when participants used CHO mouth rinse. In conclusion, the ergogenic CHO mouth rinse effects on MIT performance of mentally fatigued cyclists were irrespective of ameliorated psychological responses to exercise.
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Affiliation(s)
- Cayque Brietzke
- Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, 05508-060, Brazil; Human Movement Science and Rehabilitation Program, Federal University of São Paulo, Avenida Sena Madureira 1500, Brazil.
| | - Ítalo Vinícius
- Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, 05508-060, Brazil
| | - Wesley Alves Ribeiro
- Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, 05508-060, Brazil
| | - Paulo Estevão Franco-Alvarenga
- Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, 05508-060, Brazil; Human Movement Science and Rehabilitation Program, Federal University of São Paulo, Avenida Sena Madureira 1500, Brazil
| | - Raul Canestri
- Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, 05508-060, Brazil
| | - Gustavo César Vasconcelos
- Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, 05508-060, Brazil; Human Movement Science and Rehabilitation Program, Federal University of São Paulo, Avenida Sena Madureira 1500, Brazil
| | - Florentina Johanna Hettinga
- Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle, NE1 8ST, United Kingdom of Great Britain, Northern Ireland United Kingdom
| | - Tony Meireles Santos
- Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, 05508-060, Brazil; Physical Education Program, Research Center for Performance and Health, Federal University of Pernambuco, Recife, 52071-030, Brazil
| | - Flávio Oliveira Pires
- Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, 05508-060, Brazil; Human Movement Science and Rehabilitation Program, Federal University of São Paulo, Avenida Sena Madureira 1500, Brazil
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Hobson G, Dennis N. "I can't be dealing with this brain fog": A workplace focus group study investigating factors underpinning the menopausal experience for NHS staff. Maturitas 2024; 180:107889. [PMID: 38029510 DOI: 10.1016/j.maturitas.2023.107889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 10/27/2023] [Accepted: 11/15/2023] [Indexed: 12/01/2023]
Abstract
OBJECTIVES Multiple studies highlight that individuals undergoing menopause are not receiving sufficient support at work. An improved menopausal experience in the workplace has been found to be associated with increased job satisfaction, increased economic participation and reduced absenteeism. This work was undertaken to explore the impact of menopause on the working lives of NHS staff working in Wales, with specific emphasis on their experience of menopausal symptoms and management strategies in the workplace. STUDY DESIGN This was a qualitative study using semi-structured focus groups and thematic analysis. 14 women working in the NHS in Wales attended four focus groups, lasting up to 1.5 h. Stem questions focused on participants' positive and negative experiences in the workplace, and their receipt of support. Transcripts were analysed using the framework approach. RESULTS Three major themes were identified: experiences of menopausal symptoms and symptom management, the impact of menopause on work and the impact of work on the menopause. Menopause symptom experience in the workplace was multifaceted and varied, depending on factors such as ongoing or past symptom experience, expectations, social support and effectiveness of management strategies. Inconsistent information was highlighted as a reason why some participants felt confused both about the symptoms that they could attribute to the menopause and the management strategies available to them. A variety of symptom management strategies had been used by participants, including hormone replacement therapy, flexible working hours, working from home, changes to uniform, peer support and lifestyle changes, with varying levels of success. Some women were reticent to ask for support at work even though they felt the workplace response was likely to be supportive. Almost all the women felt that they had to persuade their GP to prescribe HRT and felt that their doctors were too reticent in prescribing this treatment. CONCLUSIONS Employers have a key role in supporting their staff experiencing menopausal symptoms, and such support has the potential to reduce sickness absence and boost retention. Based on the findings we recommend creating an open culture to break down taboos; protected time for peer support around shared experiences and effective symptom management techniques; and maximising the impact of non-menopause-specific policies such as flexible working to help all staff manage fatigue and become more productive in their roles.
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Rubio-Morales A, Díaz-García J, Harper LD, García-Calvo T. The influence of the perceived requirements of the next match and motivation on the mental fatigue of soccer players. Scand J Med Sci Sports 2024; 34:e14580. [PMID: 38339789 DOI: 10.1111/sms.14580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/16/2024] [Accepted: 01/29/2024] [Indexed: 02/12/2024]
Abstract
The high cognitive and/or emotional demands of competition can lead to a state of mental fatigue which has shown to be detrimental to soccer performance. However, there is a need to further understand the true mental demands of soccer players. The aim of the present study was to analyze the influence of motivation and the perceived requirements of the next match on mental fatigue perceived by soccer players over the passing of a season. The combined effect of both variables on the perception of mental fatigue, as well as the influence of the time of the season on perceived mental fatigue, were also analyzed. Twenty-six semi-professional Spanish male players (M = 26.31 ± 5.18 years) participated in the present study, conducted during the 2020-2021 season. Perceived mental fatigue and motivation were measured at each training session. The perceived requirements of the next match were also measured in each of the competitive weeks. Linear mixed models were run with R Studio to examine the influence of motivation and the perceived difficulty of the next match on perceived mental fatigue, the combined effect of both variables on perceived mental fatigue, and the influence of the passing of the season on perceived mental fatigue. The results showed a negative and significant influence of motivation on perceived mental fatigue (p < 0.001) and a positive and significant influence of the perceived requirements of the next match on perceived mental fatigue (p < 0.001). Regarding the combined effect, there was a positive and significant effect (p < 0.01) of the perceived difficulty of the next match on the relation between motivation and perceived mental fatigue. A negative influence of season passage on perceived mental fatigue levels was found (p < 0.001). We recommended coaches to consider using the most motivating training tasks when higher next-match requirements are perceived and to be careful with avoidance strategies for mental fatigue, especially at the beginning of the season.
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Affiliation(s)
- A Rubio-Morales
- Faculty of Sport Sciences, University of Extremadura, Cáceres, Spain
| | - J Díaz-García
- Faculty of Sport Sciences, University of Extremadura, Cáceres, Spain
| | - L D Harper
- Department of Life Sciences, Manchester Metropolitan University, Manchester, UK
- Institute of Sport, Manchester Metropolitan University, Manchester, UK
- Musculoskeletal Science and Sports Medicine, Manchester Metropolitan University, Manchester, UK
| | - T García-Calvo
- Faculty of Sport Sciences, University of Extremadura, Cáceres, Spain
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Scheer FAJL, Chellappa SL. Endogenous circadian rhythms in mood and well-being. Sleep Health 2024; 10:S149-S153. [PMID: 37648646 DOI: 10.1016/j.sleh.2023.07.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 07/16/2023] [Accepted: 07/21/2023] [Indexed: 09/01/2023]
Abstract
OBJECTIVES We examined whether the endogenous circadian timing system modulates proxies of mood vulnerability and well-being. METHODS Nineteen healthy participants (mean age: 26.6 years [23.0-30.2], seven females, body-mass index: 22.8 kg/m2 [21.1-25]) completed a laboratory protocol with a 32-hour Constant Routine, a stringently controlled protocol designed to isolate assessment of endogenous circadian rhythms. We assessed hourly anxiety- and depression-like mood (i.e., those typically observed in depression and anxiety) and well-being (i.e., associated with mental fatigue and physical comfort). RESULTS Significant endogenous circadian rhythms were observed in anxiety-like and depression-like mood, as well as well-being (p values from the mixed-model analysis using false discovery rates < .001). Post-hoc comparisons revealed more anxiety-like and depression-like mood during the circadian phase 60°-75° (∼8-9 a.m.), and more mental fatigue and less physical comfort during the circadian phase 30°-60° (∼6-8 a.m.). CONCLUSIONS Our data indicate endogenous circadian rhythms in anxiety-like and depression-like mood and well-being in healthy young adults. Future studies will help establish circadian-based therapeutics for individuals experiencing mood and anxiety disorders.
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Affiliation(s)
- Frank A J L Scheer
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, Massachusetts, USA; Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts, USA.
| | - Sarah L Chellappa
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, Massachusetts, USA; Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts, USA; School of Psychology, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, U.K..
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20
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Leitner M, Pötz G, Berger M, Fellner M, Spat S, Koini M. Characteristics and burden of acute COVID-19 and long-COVID: Demographic, physical, mental health, and economic perspectives. PLoS One 2024; 19:e0297207. [PMID: 38252638 PMCID: PMC10802963 DOI: 10.1371/journal.pone.0297207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 12/30/2023] [Indexed: 01/24/2024] Open
Abstract
BACKGROUND COVID-19 infection and its associated consequence, known as long-COVID, lead to a significant burden on the global healthcare system and limitations in people's personal and work lives. This study aims to provide further insight into the impact of acute and ongoing COVID-19 symptoms and investigates the role of patients' gender and vaccination status. METHODS 416 individuals (73.9% female) between the ages of 16 and 80 years (M = 44.18, SD = 12.90) with self-reported symptoms of long-COVID participated in an online survey conducted between March and May 2022. RESULTS 6.0%, 74.3%, and 19.7% of all respondents reported having had an asymptomatic, mild, or severe acute illness, respectively. Out of all participants, 7.8% required hospitalization. The most prevalent symptoms during the acute infection (Mdn = 23.50 symptoms, IQR = 13-39) included fatigue, exhaustion, cough, brain fog, and memory problems. The median long-COVID disease duration was 12.10 months (IQR = 2.8-17.4). Among 64 inquired long-COVID symptoms (Mdn = 17.00 symptoms, IQR = 9-27), participants reported fatigue, exhaustion, memory problems, brain fog, and dyspnea as the most common ongoing symptoms, which were generally experienced as fluctuating and deteriorating after physical or cognitive activity. Common consequences of long-COVID included financial losses (40.5%), changes in the participants' profession (41.0%), stress resistance (87.5%), sexual life (38.1%), and mood (72.1%), as well as breathing difficulties (41.3%), or an increased drug intake (e.g., medicine, alcohol; 44.6%). In addition, vaccinated individuals exhibited a shorter acute illness duration and an earlier onset of long-COVID symptoms. In general, women reported more long-COVID symptoms than men. CONCLUSION Long-COVID represents a heterogeneous disease and impacts multiple life aspects of those affected. Tailored rehabilitation programs targeting the plurality of physical and mental symptoms are needed.
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Affiliation(s)
- Manuel Leitner
- Division of Neurogeriatrics, Department of Neurology, Medical University of Graz, Graz, Austria
| | | | - Martin Berger
- Division of Neurogeriatrics, Department of Neurology, Medical University of Graz, Graz, Austria
| | | | | | - Marisa Koini
- Division of Neurogeriatrics, Department of Neurology, Medical University of Graz, Graz, Austria
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Symons M, Vandebosch H, Poels K. Boosts for walking: how humorous messages increase brisk walking among cognitively fatigued individuals. BMC Public Health 2024; 24:128. [PMID: 38195517 PMCID: PMC10775479 DOI: 10.1186/s12889-023-17464-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 12/12/2023] [Indexed: 01/11/2024] Open
Abstract
BACKGROUND A well-studied internal barrier to regular physical activity, and more specifically brisk walking, is cognitive fatigue. However, thus far little research examined how cognitively fatigued individuals can be motivated to exercise, more specifically to engage in brisk walking. This study investigates whether humorous intervention messages might be an effective strategy to motivate cognitively fatigued individuals to brisk walk, and through which underlying processes. METHODS An online experiment was performed in which variation in cognitive fatigue was induced through mental arithmetic questions. Afterwards, participants (n = 250) recruited through Prolific, randomly received either humorous or non-humorous intervention messages related to brisk walking. Potential mediators of the relations between physical activity, humour and cognitive fatigue were measured, were self-efficacy, self-control, and motivation. RESULTS First, regression analyses confirmed that cognitive fatigue negatively influences brisk walking intentions and that the perceived humour of the intervention messages moderated this relationship. Second, results showed that self-control and self-efficacy are mediators explaining the relationship between cognitive fatigue and brisk walking intentions. Lastly, this study found that perceived humour of the intervention messages moderated the relationship between cognitive fatigue and self-control, indicating that perceptions of self-control were positively changed after receiving messages that were perceived as humorous compared to messages that were not perceived as humorous, subsequently increasing brisk walking intentions. CONCLUSIONS This study is the first to unravel the underlying relationship between humorous intervention messages and brisk walking intentions through positive changes in perceptions of self-control within a cognitively fatigued sample. Results of this study suggest that existing smartphone applications monitoring and promoting brisk walking should integrate tailored message strategies within their cues to brisk walk by implementing humour as a strategy to motivate users when they are cognitively fatigued.
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Affiliation(s)
- Michelle Symons
- Department of Communication Studies, University of Antwerp, Antwerp, Belgium.
| | - Heidi Vandebosch
- Department of Communication Studies, University of Antwerp, Antwerp, Belgium
| | - Karolien Poels
- Department of Communication Studies, University of Antwerp, Antwerp, Belgium
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Salihu AT, Hill KD, Jaberzadeh S. Age and Type of Task-Based Impact of Mental Fatigue on Balance: Systematic Review and Meta-Analysis. J Mot Behav 2024; 56:373-391. [PMID: 38189442 DOI: 10.1080/00222895.2023.2299706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 12/21/2023] [Indexed: 01/09/2024]
Abstract
The role of cognition in balance control suggests that mental fatigue may negatively affect balance. However, cognitive involvement in balance control varies with the type or difficulty of the balance task and age. Steady-state balance tasks, such as quiet standing, are well-learned tasks executed automatically through reflex activities controlled by the brainstem and spinal cord. In contrast, novel, and challenging balance tasks, such as proactively controlling balance while walking over rugged terrain or reacting to unexpected external perturbations, may require cognitive processing. Furthermore, individuals with preexisting balance impairments due to aging or pathology may rely on cognitive processes to control balance in most circumstances. This systematic review and meta-analysis investigated the effect of mental fatigue on different types of balance control tasks in young and older adults. A literature search was conducted in seven electronic databases and 12 studies met eligibility criteria. The results indicated that mental fatigue had a negative impact on both proactive (under increased cognitive load) and reactive balance in young adults. In older adults, mental fatigue affected steady-state and proactive balance. Therefore, mentally fatigued older individuals may be at increased risk of a loss of balance during steady-state balance task compared to their younger counterparts.
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Affiliation(s)
- Abubakar Tijjani Salihu
- Monash Neuromodulation Research Unit, Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne, Victoria, Australia
| | - Keith D Hill
- Rehabilitation, Ageing and Independent Living (RAIL) Research Centre, School of Primary and Allied Health Care, Monash University, Frankston, Victoria, Australia
| | - Shapour Jaberzadeh
- Monash Neuromodulation Research Unit, Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne, Victoria, Australia
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Lima-Junior DD, Fortes LS, Ferreira MEC, Gantois P, Barbosa BT, Albuquerque MR, Fonseca FS. Effects of smartphone use before resistance exercise on inhibitory control, heart rate variability, and countermovement jump. Appl Neuropsychol Adult 2024; 31:48-55. [PMID: 34747667 DOI: 10.1080/23279095.2021.1990927] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND The effect of MF induced by exposure time to social media smartphone apps on inhibitory control, heart rate variability (HRV), and high-intensity physical effort following a resistance exercise session might indicate whether strength and conditioning professionals should suggest avoiding smartphone usage before a resistance exercise session. AIM The objective of this study was to analyze the effect of mental fatigue on inhibitory control, HRV, and countermovement jump (CMJ) in trained adults after resistance exercise. METHODS A total of 16 trained males (21.4 ± 3.3 years) volunteered in this study. The participants performed resistance exercises with and without mental fatigue. The Stroop Task, countermovement jump, and heart rate variability were evaluated before and after the resistance exercise. The participants used smartphones in the mental fatigue condition, whereas the participants watched TV in the control condition. RESULTS No condition × time interaction was found for the Stroop accuracy (p = 0.87), CMJ (p = 0.68), SDNN (p = 0.15), or pNN50 (p = 0.15) in the heart rate variability. An interaction was found for Stroop response time (p = 0.01) with a higher response time for the mental fatigue condition (p = 0.01). CONCLUSIONS Mental fatigue impaired the inhibitory control performance after a resistance exercise session in trained adults.
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Affiliation(s)
- Dalton de Lima-Junior
- Department of Physical Education, Universidade Federal da Paraíba, João Pessoa, Brazil
| | - Leonardo S Fortes
- Department of Physical Education, Universidade Federal da Paraíba, João Pessoa, Brazil
| | - Maria E C Ferreira
- Department of Physical Education, Universidade Federal de Juiz de Fora, Juiz de Fora, Brazil
| | - Petrus Gantois
- Department of Physical Education, Universidade Federal da Paraíba, João Pessoa, Brazil
| | | | | | - Fabiano S Fonseca
- Department of Physical Education, Universidade Federal Rural de Pernambuco, Recife, Brazil
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Jain V, Nabi N, Aggarwal S, Alam Z, Chandra K, Singh D, Kashyap V, Islam F, Kohli S. Long-term health consequences of COVID-19 in survivors hospitalised at a tertiary care hospital and their correlation with acute COVID-19 severity and associated risk factors. J Clin Nurs 2024; 33:115-125. [PMID: 36802108 DOI: 10.1111/jocn.16652] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 12/27/2022] [Accepted: 02/02/2023] [Indexed: 02/20/2023]
Abstract
OBJECTIVES To determine post-COVID syndromes in the Indian population, correlating a wide spectrum of post-COVID manifestations with acute disease severity and associated risk factors. BACKGROUND Post-COVID Syndrome (PCS) is defined as signs and symptoms that develop during or after acute COVID-19 infection. DESIGN OF STUDY This is a prospective observational cohort with repetitive measurements. METHODS The study followed RT-PCR confirmed COVID-19-positive survivors discharged from HAHC Hospital, New Delhi, for a period of 12 weeks. The patients were interviewed over the phone at 4 weeks and 12 weeks from the onset of symptoms for evaluation of clinical symptoms and health-related quality of life parameters. RESULTS A total of 200 patients completed the study. At the baseline, 50% of the patients were categorised as severe based on their acute infection assessment. At 12 weeks after symptom onset, fatigue (23.5%), hair loss (12.5%) and dyspnea (9%) were the main persistent symptoms. The incidence of hair loss (12.5%), memory loss (4.5%) and brain fog (5%) were found to be increased as compared to the acute infection period. Severity of the acute COVID infection behaved as an independent predictor for the development of PCS, with high odds of experiencing persistent cough (OR = 13.1), memory loss (OR = 5.2) and fatigue (OR = 3.3). Further, 30% of subjects in the severe group experienced statistically significant fatigue at 12 weeks (p < .05). CONCLUSION From the results of our study, it can be concluded that there is a huge disease burden of post-COVID Syndrome (PCS). The PCS comprised multisystem symptoms ranging from serious complaints of dyspnea, memory loss and brain fog to non-serious complaints of fatigue and hair loss. Severity of the acute COVID infection behaved as an independent predictor for the development of PCS. Our findings strongly recommend vaccination against COVID-19, for protection from disease severity as well as prevention of PCS. RELEVANCE TO CLINICAL PRACTICE The findings of our study support the multidisciplinary approach required for the management of PCS with a team comprising of physicians, nurses, physiotherapists and psychiatrists working in close coordination for the rehabilitation of these patients. As nurses are considered the most trusted professionals in the community and the class of health workers associated with rehabilitation, focus should be given to educating them on PCS, which would prove to be an important strategy for efficient monitoring and long-term management of COVID-19 survivors.
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Affiliation(s)
- Vineet Jain
- Department of Medicine, Hamdard Institute of Medical Sciences and Research and associated HAHC Hospital, New Delhi, India
| | - Nusrat Nabi
- Department of Pharmacology, Hamdard Institute of Medical Sciences and Research and associated HAHC Hospital, New Delhi, India
| | - Sanjana Aggarwal
- Department of Medicine, Hamdard Institute of Medical Sciences and Research and associated HAHC Hospital, New Delhi, India
| | - Zaara Alam
- Department of Medicine, Hamdard Institute of Medical Sciences and Research and associated HAHC Hospital, New Delhi, India
| | - Kailash Chandra
- Department of Biochemistry, Hamdard Institute of Medical Sciences and Research and associated HAHC Hospital, New Delhi, India
| | - Dharmander Singh
- Department of Medicine, Hamdard Institute of Medical Sciences and Research and associated HAHC Hospital, New Delhi, India
| | - Varun Kashyap
- Department of Community Medicine, Hamdard Institute of Medical Sciences and Research and associated HAHC Hospital, New Delhi, India
| | - Farzana Islam
- Department of Community Medicine, Hamdard Institute of Medical Sciences and Research and associated HAHC Hospital, New Delhi, India
| | - Sunil Kohli
- Department of Medicine, Hamdard Institute of Medical Sciences and Research and associated HAHC Hospital, New Delhi, India
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Wirdnam M, Ferrar K, Mayes S, MacMahon C, Cook J, Rio E. "A sprained ankle is the biggest sign of mental fatigue": A qualitative study of the perceptions and experiences of mental fatigue in professional ballet. Phys Ther Sport 2024; 65:154-161. [PMID: 38218024 DOI: 10.1016/j.ptsp.2023.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/05/2023] [Accepted: 12/18/2023] [Indexed: 01/15/2024]
Abstract
Mental fatigue is known to influence endurance, skill, and tactical performance in sport. Research investigating the impact of mental fatigue on tasks that combine physical, cognitive, and aesthetic performance such as professional ballet does not exist. OBJECTIVE To understand the perceptions and experiences of mental fatigue in professional ballet. DESIGN Qualitative, focus groups and semi-structured interviews. SETTING The Australian Ballet. PARTICIPANTS Thirty-nine professional ballet dancers (53% of the company) and six dance staff members aged 18 years or above (53% female). MAIN OUTCOME MEASURES N/a. RESULTS The average focus group and interview length was 48 ± 7 min and 41 ± 8 min. Key categories were; (1) Dancers and dance staff perceive that new learning contributes to mental fatigue, (2) Dancers perceive changes to their mood and perception of effort when they are mentally fatigued, and (3) Dancers and dance staff perceive that mental fatigue negatively affects their physical and cognitive performance and, increases their risk of injury. CONCLUSION This is the first study where participants associated mental fatigue with injury risk and provides a springboard to measure the impact of mental fatigue on learning, injury, and performance in professional ballet.
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Affiliation(s)
- Matthew Wirdnam
- School of Allied Health, Physiotherapy, La Trobe University, Plenty Road & Kingsbury Dr, Bundoora, VIC, 3086, Australia; The Australian Ballet, Kavanagh Street, Southbank, VIC, 3006, Australia.
| | - Katia Ferrar
- Sports & Exercise Medicine Research Centre, La Trobe University, Plenty Road & Kingsbury Dr, Bundoora, VIC, 3086, Australia; The Australian Ballet, Kavanagh Street, Southbank, VIC, 3006, Australia; South Australian Health & Medical Research Institute, North Terrace, SA, 5000, Australia
| | - Susan Mayes
- School of Allied Health, Human Services and Sport, La Trobe University, Plenty Road & Kingsbury Dr, Bundoora, VIC, 3086, Australia; The Australian Ballet, Kavanagh Street, Southbank, VIC, 3006, Australia. https://twitter.com/S_Maysey
| | - Clare MacMahon
- School of Sports & Exercise Science, La Trobe University, Plenty Road & Kingsbury Dr, Bundoora, VIC, 3086, Australia. https://twitter.com/ProfJillCook
| | - Jill Cook
- Sports & Exercise Medicine Research Centre, La Trobe University, Plenty Road & Kingsbury Dr, Bundoora, VIC, 3086, Australia
| | - Ebonie Rio
- Sports & Exercise Medicine Research Centre, La Trobe University, Plenty Road & Kingsbury Dr, Bundoora, VIC, 3086, Australia; The Australian Ballet, Kavanagh Street, Southbank, VIC, 3006, Australia. https://twitter.com/tendonpain
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Csathó Á, Van der Linden D, Matuz A. Change in heart rate variability with increasing time-on-task as a marker for mental fatigue: A systematic review. Biol Psychol 2024; 185:108727. [PMID: 38056707 DOI: 10.1016/j.biopsycho.2023.108727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 11/30/2023] [Accepted: 12/01/2023] [Indexed: 12/08/2023]
Abstract
Fatigue-specific changes in the autonomic nervous system are often assumed to underlie the development of mental fatigue caused by prolonged cognitive tasks (i.e. Time-on-Task). Therefore, several previous studies have chosen to investigate the Time-on-Task related changes in heart rate variability (HRV). However, previous studies have used many different HRV indices, and their results often show inconsistencies. The present study, therefore, systematically reviewed previous empirical HRV studies with healthy individuals and in which mental fatigue is induced by prolonged cognitive tasks. Articles relevant to the objectives were systematically searched and selected by applying the PRISMA guidelines. We screened 360 records found on 4 databases and found that 19 studies were eligible for full review in accordance with the inclusion criteria. In general, all studies reviewed (with the exception of two studies) found significant changes in HRV with increasing Time-on-Task, suggesting that HRV is a reliable autonomic marker for Time-on-Task induced fatigue. The most conclusive HRV indices that showed a consistent Time-on-Task effect were the low frequency component of HRV and the time domain indices, particularly the root mean square of successive differences. Time-on-Task typically induced an increasing trend in both type of measures.
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Affiliation(s)
- Árpád Csathó
- Department of Behavioural Sciences, Medical School, University of Pécs, Pécs, Hungary; Szentágothai Research Centre, University of Pécs, Pécs, Hungary.
| | - Dimitri Van der Linden
- Department of Psychology, Education, and Child Studies, Erasmus University Rotterdam, Rotterdam, the Netherlands.
| | - András Matuz
- Department of Behavioural Sciences, Medical School, University of Pécs, Pécs, Hungary; Szentágothai Research Centre, University of Pécs, Pécs, Hungary.
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Hassanzadeh-Rangi N, Jalilian H, Farshad AA, Khosravi Y. Correlation of Work Fatigue and Mental Workload in Train Drivers: A Cross-sectional Study. J Res Health Sci 2023; 23:e00600. [PMID: 38315915 PMCID: PMC10843319 DOI: 10.34172/jrhs.2023.135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 11/05/2023] [Accepted: 12/05/2023] [Indexed: 02/07/2024] Open
Abstract
BACKGROUND Evidence suggests that train drivers experience a high level of fatigue and mental workload. The present study aimed to assess overall, physical, and mental fatigue levels and their correlations with the mental workload in the metro train operation. Study Design: A cross-sectional study. METHODS This study was conducted on all 1194 train drivers in the Tehran Metro. The train drivers completed the Samn-Perelli Fatigue Scale and the Fatigue Assessment Scales at the beginning and end of the shift. In addition, they completed the National Aeronautics and Space Administration Task Load Index in the middle and at the end of the shift. Correlation and regression analyses were performed on the data to test the study hypothesis. RESULTS Overall, physical, and mental fatigue levels increased significantly at the end of the shift compared to the onset of the shift (P<0.001). The mental workload and related dimensions were significantly increased at the end of the shift compared to the middle of the shift (P<0.001). Mental demand was the most important workload problem among the train drivers. The highest correlation was found between overall workload and time pressure (R=0.68, P<0.001). CONCLUSION The mental workload had a significant correlation with work fatigue in the train drivers. Control measures should be focused on the mental workload and related dimensions, especially mental demand and time pressure.
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Affiliation(s)
- Narmin Hassanzadeh-Rangi
- Department of Occupational Health and Safety Engineering, School of Health, Alborz University of Medical Sciences, Karaj, Iran
- Research Center for Health, Safety, and Environment, Alborz University of Medical Sciences, Karaj, Iran
| | - Hamed Jalilian
- Postdoctoral Researcher at the Swiss Tropical and Public Health Institute, Basel, Swtizerlad
- Department of Occupational Health and Safety Engineering, School of Health, Qom University of Medical Sciences, Qom, Iran
| | - Ali-Asghar Farshad
- Occupational Health Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Yahya Khosravi
- Department of Occupational Health and Safety Engineering, School of Health, Alborz University of Medical Sciences, Karaj, Iran
- Research Center for Health, Safety, and Environment, Alborz University of Medical Sciences, Karaj, Iran
- Non-Communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
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Jacquet T, Lepers R, Pageaux B, Poulin-Charronnat B. Acute smartphone use impairs vigilance and inhibition capacities. Sci Rep 2023; 13:23046. [PMID: 38155267 PMCID: PMC10754937 DOI: 10.1038/s41598-023-50354-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 12/19/2023] [Indexed: 12/30/2023] Open
Abstract
Smartphones are now in very widespread use, and concerns have arisen about potential detrimental effects, even with acute use. These adverse consequences are often linked to the emergence of mental fatigue. While the cognitive implications of fatigue are well-documented, knowledge about the specific influence of acute smartphone use on cognitive performance remains scarce. The aim of this study was therefore to investigate the impact of acute smartphone use on cognitive performance. It included two experiments: one designed to assess the impact of smartphone use on vigilance, and the other focusing on evaluating inhibition capacities. In Experiment 1, two groups of 40 participants completed a Psychomotor Vigilance Task (PVT) before and after using a smartphone for 45 min (experimental group), or before and after watching a documentary (control group). In Experiment 2, two groups of 40 participants were subjected to a similar experimental design but had to perform a Go/NoGo task instead of a PVT. Mental fatigue and drowsiness were evaluated with visual analog scales before and after smartphone use and watching a documentary. Results suggested that both watching a documentary and using a smartphone for 45 min increased subjective mental fatigue and drowsiness. Watching the documentary did not impair cognitive performance. Reaction times on the PVT and number of errors on NoGo trials in the Go/NoGo task were higher among the participants in the smartphone condition. These results indicate reduced vigilance and impaired inhibition capacities only after smartphone use. We conclude that acute smartphone use induces mental fatigue and decreases cognitive performance. Further research is needed to understand the mechanisms underlying this decline in cognitive performance.
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Affiliation(s)
- Thomas Jacquet
- CAPS, Inserm U1093, Université de Bourgogne, Faculté Des Sciences du Sport, BP 27877 UFR STAPS, I3M, 64 Rue de Sully, 21000, Dijon, France.
| | - Romuald Lepers
- CAPS, Inserm U1093, Université de Bourgogne, Faculté Des Sciences du Sport, BP 27877 UFR STAPS, I3M, 64 Rue de Sully, 21000, Dijon, France
| | - Benjamin Pageaux
- École de kinésiologie et des Sciences de l'activité physique (EKSAP), Faculté de médecine, Université de Montréal, Montreal, QC, Canada
- Centre de recherche de l'Institut universitaire de geriatrie de Montréal (CRIUGM), Montreal, QC, Canada
- Centre interdisciplinaire de recherche sur le cerveau et l'apprentissage (CIRCA), Montreal, QC, Canada
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Pleguezuelos E, Sánchez-Nuño S, Del Carmen A, Serra-Payá N, Moreno E, Molina-Raya L, Robleda G, Benet M, Santos-Ruiz S, Garrido AB, Jerez-Molina C, Miravitlles M, Serra-Prat M, Viñals X, Farrés MG, Carbonell T, Garnacho-Castaño MV. Effect of different types of supervised exercise programs on cardiorespiratory and muscular fitness, pain, fatigue, mental health and inflammatory and oxidative stress biomarkers in older patients with post-COVID-19 sequelae "EJerSA-COVID-19": a randomized controlled trial. BMC Geriatr 2023; 23:865. [PMID: 38102536 PMCID: PMC10724883 DOI: 10.1186/s12877-023-04544-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 11/30/2023] [Indexed: 12/17/2023] Open
Abstract
BACKGROUND Many patients with COVID-19 present the so-called post-acute sequelae of COVID-19 such as fatigue, post-stress discomfort, dyspnea, headache, pain mental impairment, incapacity to perform daily physical tasks ant exercise intolerance. This study aims to investigate the effects of different exercise programs on physical and mental fitness, physical condition and biomarkers of the immune system and oxidative stress in older patients with post-COVID-19 sequelae. METHODS The sample will be made up of 120 eligible participants, over the age of 60 years who have had COVID-19 disease and are survivors and present persistent COVID-19 symptomatology diagnosed by the corresponding physician. The participants will be randomly assigned to the experimental groups: supervised endurance group (SEG, n = 30), supervised strength group (SSG, n = 30), supervised concurrent group (SCG, n = 30), which will perform the corresponding exercise program 3 days a week compared to the control group (CG, n = 30), which will not carry out a supervised exercise program. The design of this project will include measurements of four relevant dimensions; 1) Cardiorespiratory fitness; 2) Muscle fitness; 3) Pain and mental health; and 4) Biomarkers of inflammation and oxidative stress. CONCLUSIONS The results of this study will provide insights into the effects of different exercise programs on physical and mental fitness, physical condition and biomarkers of the immune system and oxidative stress in older patients with post-COVID-19 sequelae. These findings may be the basis for the formulation of health plans and rehabilitation programs that allow healthy aging and a reduction in the associated morbidity in patients with post-COVID-19 sequelae. TRIAL REGISTRATION NCT05848518. Registered on May 8, 2023.
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Affiliation(s)
- Eulogio Pleguezuelos
- Departamento de Medicina Física y Rehabilitación, Hospital de Mataró, Barcelona, Spain
- Departamento de Ciencias Experimentales y Sanitarias. Facultad de Ciencias de la Salud, Universitat Pompeu Fabra, Barcelona, Spain
| | - Sergio Sánchez-Nuño
- Grupo de Investigación DAFNiS (Dolor, Actividad Física, Nutrición y Salud), Campus Docent Sant Joan de Déu, Universitat de Barcelona, C/ Sant, C. de Sta. Benito Menni, 18-20, Sant Boi de Llobregat, 08830, Barcelona, Spain
| | - Amin Del Carmen
- Departamento de Medicina Física y Rehabilitación, Hospital de Mataró, Barcelona, Spain
| | - Noemí Serra-Payá
- Grupo de Investigación DAFNiS (Dolor, Actividad Física, Nutrición y Salud), Campus Docent Sant Joan de Déu, Universitat de Barcelona, C/ Sant, C. de Sta. Benito Menni, 18-20, Sant Boi de Llobregat, 08830, Barcelona, Spain
| | - Eva Moreno
- Servicio de Medicina Física y Rehabilitación, Hospital General de Hospitalet, L´Hospitalet de Llobregat, Barcelona, Spain
| | - Lorena Molina-Raya
- Grupo de Investigación DAFNiS (Dolor, Actividad Física, Nutrición y Salud), Campus Docent Sant Joan de Déu, Universitat de Barcelona, C/ Sant, C. de Sta. Benito Menni, 18-20, Sant Boi de Llobregat, 08830, Barcelona, Spain
| | - Gemma Robleda
- Grupo de Investigación DAFNiS (Dolor, Actividad Física, Nutrición y Salud), Campus Docent Sant Joan de Déu, Universitat de Barcelona, C/ Sant, C. de Sta. Benito Menni, 18-20, Sant Boi de Llobregat, 08830, Barcelona, Spain
| | - Marta Benet
- Grupo de Investigación DAFNiS (Dolor, Actividad Física, Nutrición y Salud), Campus Docent Sant Joan de Déu, Universitat de Barcelona, C/ Sant, C. de Sta. Benito Menni, 18-20, Sant Boi de Llobregat, 08830, Barcelona, Spain
| | - Susana Santos-Ruiz
- Grupo de Investigación DAFNiS (Dolor, Actividad Física, Nutrición y Salud), Campus Docent Sant Joan de Déu, Universitat de Barcelona, C/ Sant, C. de Sta. Benito Menni, 18-20, Sant Boi de Llobregat, 08830, Barcelona, Spain
| | - Ainoa Biurrun Garrido
- Grupo de Investigación DAFNiS (Dolor, Actividad Física, Nutrición y Salud), Campus Docent Sant Joan de Déu, Universitat de Barcelona, C/ Sant, C. de Sta. Benito Menni, 18-20, Sant Boi de Llobregat, 08830, Barcelona, Spain
| | - Carmen Jerez-Molina
- Grupo de Investigación DAFNiS (Dolor, Actividad Física, Nutrición y Salud), Campus Docent Sant Joan de Déu, Universitat de Barcelona, C/ Sant, C. de Sta. Benito Menni, 18-20, Sant Boi de Llobregat, 08830, Barcelona, Spain
| | - Marc Miravitlles
- Servicio de Neumología. Hospital Universitari Vall d'HebronVall d'Hebron Institut de Recerca (VHIR), Campus Hospital Barcelona, CIBER de Enfermedades Respiratorias (CIBERES) Barcelona, Barcelona, Spain
| | - Mateu Serra-Prat
- Unidad de InvestigaciónConsorci Sanitari del Maresme, Mataró, Barcelona, Spain
| | - Xavier Viñals
- Grupo de Investigación DAFNiS (Dolor, Actividad Física, Nutrición y Salud), Campus Docent Sant Joan de Déu, Universitat de Barcelona, C/ Sant, C. de Sta. Benito Menni, 18-20, Sant Boi de Llobregat, 08830, Barcelona, Spain
| | - Montserrat Girabent Farrés
- Grupo de Investigación DAFNiS (Dolor, Actividad Física, Nutrición y Salud), Campus Docent Sant Joan de Déu, Universitat de Barcelona, C/ Sant, C. de Sta. Benito Menni, 18-20, Sant Boi de Llobregat, 08830, Barcelona, Spain
| | - Teresa Carbonell
- Departamento de Biología Celular, Fisiología e Inmunología, Universitat de Barcelona, Barcelona, Spain
| | - Manuel V Garnacho-Castaño
- Grupo de Investigación DAFNiS (Dolor, Actividad Física, Nutrición y Salud), Campus Docent Sant Joan de Déu, Universitat de Barcelona, C/ Sant, C. de Sta. Benito Menni, 18-20, Sant Boi de Llobregat, 08830, Barcelona, Spain.
- Facultad de Ciencias de la Salud, Universidad Internacional de Valencia (VIU), 46002, Valencia, Spain.
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Cong L, Huang M, Yang J, Cheng S, Teng C, Xiong K, Zhang T, Dang W, Liu C, Ma J, Hu W. Standard low-resolution electromagnetic tomography imaging of brain for the analysis of mental fatigue during a simulated air traffic control task. Neuro Endocrinol Lett 2023; 44:491-499. [PMID: 38131172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 11/28/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Standard low-resolution electromagnetic tomography (sLORETA) was used to accurately detect EEG changes in mental fatigue of air traffic controllers (ATCo) under a simulated air traffic control (ATC) task. We explored the changes in standard current density, activated cortical intensity, and brain source location. METHODS The participants were instructed to use the tower flight command simulation training system for three hours of uninterrupted ATC task. The 3-hour EEG signal was divided into four stages: task start, 1st hour, 2nd hour, and task end. Each stage was preprocessed for 3 minutes to explore the EEG changes and then processed by sLORETA in a statistical non-parametric mapping analysis. RESULTS The current density distribution of δ and α oscillations differed significantly during the four tasks, while θ, β and γ oscillations did not. Changes in δ oscillations of the brain during mental fatigue were detected mainly in the postcentral gyrus (BA2 and BA3), precentral gyrus (BA4 and BA6), inferior temporal gyrus (BA20), and superior temporal gyrus (BA38). The α oscillations were found mainly decreased in the postcentral gyrus (BA2) and inferior parietal lobule (BA40) when the task was in progress compared with the end of the task. CONCLUSION The superior temporal gyrus and somatosensory cortex were the main activated cortical regions during the simulated ATC task. The α and δ oscillations showed contrasting activity during simulated ATC task, which might reflect the release of task-relevant brain's areas from inhibition and enhance the neural activity.
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Affiliation(s)
- Lin Cong
- School of Aerospace Medicine, Air Force Medical University, Xi'an, China
| | - Meiqing Huang
- School of Aerospace Medicine, Air Force Medical University, Xi'an, China
| | - Jinghua Yang
- Fundamentals Department, Air Force Engineering University, Xi'an, China
| | - Shan Cheng
- School of Aerospace Medicine, Air Force Medical University, Xi'an, China
| | - Chaolin Teng
- School of Aerospace Medicine, Air Force Medical University, Xi'an, China
| | - Kaiwen Xiong
- School of Aerospace Medicine, Air Force Medical University, Xi'an, China
| | - Taihui Zhang
- School of Aerospace Medicine, Air Force Medical University, Xi'an, China
| | - Weitao Dang
- School of Aerospace Medicine, Air Force Medical University, Xi'an, China
| | - Cui Liu
- School of Aerospace Medicine, Air Force Medical University, Xi'an, China
| | - Jin Ma
- School of Aerospace Medicine, Air Force Medical University, Xi'an, China
| | - Wendong Hu
- School of Aerospace Medicine, Air Force Medical University, Xi'an, China
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Elliott TR, Hsiao YY, Randolph K, Urban RJ, Sheffield-Moore M, Pyles RB, Masel BE, Wexler T, Wright TJ. Efficient assessment of brain fog and fatigue: Development of the Fatigue and Altered Cognition Scale (FACs). PLoS One 2023; 18:e0295593. [PMID: 38079429 PMCID: PMC10712873 DOI: 10.1371/journal.pone.0295593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 11/22/2023] [Indexed: 12/18/2023] Open
Abstract
Debilitating symptoms of fatigue and accompanying "brain fog" are observed among patients with various chronic health conditions. Unfortunately, an efficient and psychometrically sound instrument to assess these co-occurring symptoms is unavailable. Here, we report the development and initial psychometric properties of the Fatigue and Altered Cognition Scale (the FACs), a measure of self-reported central fatigue and brain fog. Traumatic brain injury (TBI) was chosen to model and develop the FACs due to research team expertise and established links between TBI and the symptom complex. Potential items were generated by researchers and clinicians with experience treating these symptoms, drawing from relevant literature and review of patient responses to measures from past and current TBI studies. The 20 candidate items for the FACs-ten each to assess altered cognition (i.e., brain fog) and central fatigue-were formatted on an electronic visual analogue response scale (eVAS) via an online survey. Demographic information and history of TBI were obtained. A total of 519 participants consented and provided usable data (average age = 40.23 years; 73% female), 204 of whom self-reported a history of TBI (75% reported mild TBI). Internal consistency and reliability values were calculated. Confirmatory factor analysis (CFA) examined the presumed two-factor structure of the FACs and a one-factor solution for comparison. A measurement invariance test of the two latent constructs (altered cognition, fatigue) among participants with and without TBI was conducted. All items demonstrated normal distribution. Cronbach's alpha coefficients indicated good internal consistency for both factors (α's = .95). Omega reliability values were favorable (α's = .95). CFA supported the presumed two-factor model and item loadings which outperformed the one-factor model. Measurement invariance found the two-factor structure was consistent between the two groups. Implications of these findings, study limitations, and potential use of the FACs in clinical research and practice are discussed.
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Affiliation(s)
- Timothy R. Elliott
- Department of Educational Psychology, Texas A&M University, College Station, Texas, United States of America
| | - Yu-Yu Hsiao
- Department of Individual, Family, and Community Education, University of New Mexico, Albuquerque, New Mexico, United States of America
| | - Kathleen Randolph
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Randall J. Urban
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Melinda Sheffield-Moore
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Richard B. Pyles
- Department of Pediatrics, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Brent E. Masel
- Department of Neurology, University of Texas Medical Branch, Galveston, TX, United States of America
| | - Tamara Wexler
- Department of Rehabilitation Medicine, New York University Langone Health, New York, NY, United States of America
| | - Traver J. Wright
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
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Bijleveld E. The ebb and flow of cognitive fatigue. Trends Cogn Sci 2023; 27:1109-1110. [PMID: 37845173 DOI: 10.1016/j.tics.2023.09.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 09/29/2023] [Indexed: 10/18/2023]
Abstract
If you are currently feeling tired, you are not alone: feelings of fatigue are incredibly common. In a recent study, Matthews et al. investigated moment-to-moment fluctuations in fatigue using behavioral experiments and computational modeling. The study offers a precise account of how fatigue waxes (during physical and cognitive effort) and wanes (during rest).
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Affiliation(s)
- Erik Bijleveld
- Behavioural Science Institute, Radboud University, Thomas van Aquinostraat 4, 6525GD Nijmegen, The Netherlands.
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Sethi T, Ziat M. Dark mode vogue: Do light-on-dark displays have measurable benefits to users? Ergonomics 2023; 66:1814-1828. [PMID: 36533999 DOI: 10.1080/00140139.2022.2160879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 12/14/2022] [Indexed: 06/17/2023]
Abstract
This work investigates the effect of display polarity on cognitive load, using eye-tracking and subjective measures, and emotional reactions to assess whether the popularity of negative polarity displays is related to affective qualities or true physiological benefits. Younger and older adults tested positive and negative polarities under bright and dim environments for writing and search tasks. Eye-tracking results showed higher cognitive load using negative polarity, reflected in increased search time and pupil diameter for older adults in a bright environment and younger adults in a dim environment. For older adults, mental effort scores were higher using negative polarity for the search task in a bright environment. This group reported more positive emotions using positive polarity, while younger adults expressed more interest in negative polarity. These results suggest that older adults use positive polarity to avoid mental fatigue, while younger adults use negative polarity in a dim environment for aesthetic reasons. Practitioner summary: The effects of negative polarity on cognitive load and users' preferences are often unclear. Eye-tracking and subjective data reveals that negative polarity displays elicit higher cognitive load for older adults in a bright environment and younger adults in a dim environment, suggesting older adults prioritise reduced fatigue while younger adults prioritise the feel of the interface.
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Affiliation(s)
- Tara Sethi
- Human Factors in Information Design, Bentley University, Waltham, MA, USA
| | - Mounia Ziat
- Human Factors in Information Design, Bentley University, Waltham, MA, USA
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Holgado D, Mesquida C, Román-Caballero R. Assessing the Evidential Value of Mental Fatigue and Exercise Research. Sports Med 2023; 53:2293-2307. [PMID: 37682411 PMCID: PMC10687172 DOI: 10.1007/s40279-023-01926-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/24/2023] [Indexed: 09/09/2023]
Abstract
It has often been reported that mental exertion, presumably leading to mental fatigue, can negatively affect exercise performance; however, recent findings have questioned the strength of the effect. To further complicate this issue, an overlooked problem might be the presence of publication bias in studies using underpowered designs, which is known to inflate false positive report probability and effect size estimates. Altogether, the presence of bias is likely to reduce the evidential value of the published literature on this topic, although it is unknown to what extent. The purpose of the current work was to assess the evidential value of studies published to date on the effect of mental exertion on exercise performance by assessing the presence of publication bias and the observed statistical power achieved by these studies. A traditional meta-analysis revealed a Cohen's dz effect size of - 0.54, 95% CI [- 0.68, - 0.40], p < .001. However, when we applied methods for estimating and correcting for publication bias (based on funnel plot asymmetry and observed p-values), we found that the bias-corrected effect size became negligible with most of publication-bias methods and decreased to - 0.36 in the more optimistic of all the scenarios. A robust Bayesian meta-analysis found strong evidence in favor of publication bias, BFpb > 1000, and inconclusive evidence in favor of the effect, adjusted dz = 0.01, 95% CrI [- 0.46, 0.37], BF10 = 0.90. Furthermore, the median observed statistical power assuming the unadjusted meta-analytic effect size (i.e., - 0.54) as the true effect size was 39% (min = 19%, max = 96%), indicating that, on average, these studies only had a 39% chance of observing a significant result if the true effect was Cohen's dz = - 0.54. If the more optimistic adjusted effect size (- 0.36) was assumed as the true effect, the median statistical power was just 20%. We conclude that the current literature is a useful case study for illustrating the dangers of conducting underpowered studies to detect the effect size of interest.
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Affiliation(s)
- Darías Holgado
- Department of Experimental Psychology, and Mind, Brain and Behavior Research Center, University of Granada, Granada, Spain.
- Institute of Sport Sciences, University of Lausanne, Quartier UNIL-Centre, Bâtiment Synathlon, Lausanne, Switzerland.
| | - Cristian Mesquida
- Centre of Applied Science for Health, Technological University Dublin, Tallaght, Ireland
| | - Rafael Román-Caballero
- Department of Experimental Psychology, and Mind, Brain and Behavior Research Center, University of Granada, Granada, Spain
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Chen Y, Liu M, Zhou J, Bao D, Li B, Zhou J. Acute Effects of Fatigue on Cardiac Autonomic Nervous Activity. J Sports Sci Med 2023; 22:806-815. [PMID: 38045744 PMCID: PMC10690502 DOI: 10.52082/jssm.2023.806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Accepted: 11/23/2023] [Indexed: 12/05/2023]
Abstract
The onset of fatigue disrupts the functioning of the autonomic nervous system (ANS), potentially elevating the risk of life-threatening incidents and impairing daily performance. Previous studies mainly focused on physical fatigue (PF) and mental fatigue (MF) effects on the ANS, with limited knowledge concerning the influence of physical-mental fatigue (PMF) on ANS functionality. This study aimed to assess the immediate impact of PMF on ANS function and to compare its effects with those of PF and MF on ANS function. Thirty-six physically active college students (17 females) without burnout performed 60-min cycling exercises, AX-Continuous Performance Task (AX-CPT), and cycling combined with AX-CPT to induce PF, MF, and PMF respectively. Subjective fatigue levels were measured using the Rating of Perceived Exertion scale and the Visual Analog Scale-Fatigue. Heart rate variability was measured before and after each protocol to assess cardiac autonomic function. The proposed tasks successfully induced PF, MF, and PMF, demonstrated by significant changes in subjective fatigue levels. Compared with baseline, PMF decreased the root mean square of successive differences (RMSSD) between normal heartbeats (P < 0.001, d = 0.50), the standard deviation of normal-to-normal RR intervals (SDNN) (P < 0.01, d = 0.33), and the normalized high-frequency (nHF) power (P < 0.001, d = 0.32) while increased the normalized low-frequency (nLF) power (P < 0.001, d = 0.35) and the nLF/nHF ratio (P < 0.001, d = 0.40). Compared with MF, PMF significantly decreased RMSSD (P < 0.001, η2 = 0.431), SDNN (P < 0.001, η2 = 0.327), nLF (P < 0.01, η2 = 0.201), and nHF (P < 0.001, η2 = 0.377) but not the nLF/nHF ratio. There were no significant differences in ΔHRV (i.e., ΔRMSSD, ΔSDNN, ΔnLF/nHF, ΔnLF, and ΔnHF), heart rate, and training impulse between PF- and PMF-inducing protocols. Cognitive performance (i.e., accuracy) in AX-CPT during the PMF-inducing protocol was significantly lower than that during the MF-inducing protocol (P < 0.001, η2 = 0.101). PF and PMF increased sympathetic activity and decreased parasympathetic activity, while MF enhanced parasympathetic activity.
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Affiliation(s)
- Yan Chen
- Sports Department, Beihang University, Beijing, China
| | - Meng Liu
- Sports Coaching College; Beijing Sport University, Beijing, China
| | - Jun Zhou
- China Athletics College, Beijing Sport University, Beijing, China
| | - Dapeng Bao
- China Institute of Sport and Health Science, Beijing Sport University, Beijing, China
| | - Bin Li
- Cycling and Fencing Administrative Center, General Administration of Sport of China, Beijing, China
| | - Junhong Zhou
- Hebrew SeniorLife Hinda and Arthur Marcus Institute for Aging Research, Harvard Medical School, Boston, MA, United States
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Wu X, Yang J, Shao Y, Chen X. Mental fatigue assessment by an arbitrary channel EEG based on morphological features and LSTM-CNN. Comput Biol Med 2023; 167:107652. [PMID: 37950945 DOI: 10.1016/j.compbiomed.2023.107652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 10/05/2023] [Accepted: 10/31/2023] [Indexed: 11/13/2023]
Abstract
In order to achieve more sensitive mental fatigue assessment (MFA) based on an arbitrary channel EEG, this study proposed a series of feature extraction methods that combine mathematical morphology (MM), as well as an LSTM-CNN architecture. Firstly, 37 subjects had their resting-state EEGs collected at rested wakefulness (RW) and after 24 h of sleep deprivation (SD) using a 30-channel EEG acquisition device, the RW and SD groups were regarded as the negative and positive groups of mental fatigue, respectively, and the EEG collection were further categorized into two conditions: eye-opened state (EO) and eye-closed state (EC). Then, since MM can reflect the morphological characteristics of EEG rhythms and their potentials relatively independently of the time-frequency analysis and phase calculation, the MM methods were found to better reflect the mental fatigue after SD statistically, whether for single features (ANOVA: p<0.000001), multiple features (clustering by K-means, t-test: p<0.01), or time series feature spaces (calculating CD, t-test: p<0.01) of a single channel. Finally, the LSTM-CNN enhanced the generalization ability when dealing with different single-channel EEG by combining GRUs with convolutional layers: comparing the AUCs of different architectures for MFA based on an arbitrary channel, LSTM-CNN (0.992) > LSTM network (0.94) > CNN (0.831) > MLP (0.754). Moreover, the use of MM also improved the accuracy of analyzed architectures, and the true/false positive rate (TPR/FPR) of the LSTM-CNN architecture for MFA based on an arbitrary channel reached 97.024 %/3.497 %, which provided a feasible solution for the arbitrary channel EEG-based MFA.
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Affiliation(s)
- Xiaolong Wu
- School of Mechanical Engineering, University of Science and Technology Beijing, Beijing, China; Shunde Innovation School, University of Science and Technology Beijing, Guangdong, China
| | - Jianhong Yang
- School of Mechanical Engineering, University of Science and Technology Beijing, Beijing, China; Shunde Innovation School, University of Science and Technology Beijing, Guangdong, China; Technical Support Center for Prevention and Control of Disastrous Accidents in Metal Smelting, University of Science and Technology Beijing, Beijing, China.
| | - Yongcong Shao
- School of Psychology, Beijing Sport University, Beijing, China; Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science, Suzhou, China
| | - Xuewei Chen
- Institute of Environmental and Operational Medicine, Academy of Military Sciences, Tianjin, China
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Chen S, Wu H, Sun M, Wei Q, Zhang Q. Effects of shift work schedules, compensatory sleep, and work-family conflict on fatigue of shift-working nurses in Chinese intensive care units. Nurs Crit Care 2023; 28:948-956. [PMID: 37078518 DOI: 10.1111/nicc.12909] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 03/06/2023] [Accepted: 03/14/2023] [Indexed: 04/21/2023]
Abstract
BACKGROUND Shift work is inevitable for nurses in intensive care units. Various studies explored nurses' fatigue in multiple hospital wards. However, few studies focused on fatigue among nurses in intensive care units. AIMS To determine the association between shift work schedules, compensatory sleep, work-family conflict, and fatigue of shift-working nurses in critical care units. STUDY DESIGN A descriptive cross-sectional multi-center study was conducted in March 2022 among intensive care nurses from five hospitals. METHODS Data were collected by online survey, including self-designed demographic questions, the Fatigue Scale-14, the Chinese adult daytime sleepiness scale, and the work-family scale. Pearson correlation was conducted for bivariate analysis. Independent-sample t-test, one-way ANOVA, and multiple linear regression analysis were performed to examine fatigue-related variables. RESULTS A total of 326 nurses responded to the survey with an effective response rate of 74.9%. The mean scores of physical fatigue and mental fatigue were 6.80 and 3.72, respectively. The bivariate analyses showed that work-family conflict was positively correlated with physical (r = 0.483, p < .001) and mental fatigue (r = 0.406, p < .001). Multiple linear regression results showed that work-family conflict, daytime sleepiness, and shift system were statistically significant factors influencing physical fatigue (F = 41.793, p < .001). Work-family conflict, sleep duration after the night shift, and daytime sleepiness were the main influencing factors of mental fatigue (F = 25.105, p < .001). CONCLUSIONS Nurses with higher work-family conflict, daytime sleepiness, and working 12-h shifts have higher levels of physical fatigue. Higher work-family conflict, shorter sleep duration after night shifts, and daytime sleepiness are associated with higher mental fatigue among intensive care nurses. RELEVANCE TO CLINICAL PRACTICE Nursing managers and nurses should consider work-family factors and compensatory sleep in their efforts to reduce fatigue. It is necessary to strengthen work-supporting strategies and compensatory sleep guidance for nurses to promote fatigue recovery.
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Affiliation(s)
- Shanshan Chen
- Department of Intensive Care Unit, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Huihui Wu
- Department of Intensive Care Unit, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Mimi Sun
- Department of Intensive Care Unit, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Qing Wei
- Department of Intensive Care Unit, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Qixia Zhang
- Department of Intensive Care Unit, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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Zhang D, Zhang X, Wu Q, Gu Z, Dong C, Gu X, Li R, Zong Z, Li L. Multidimensional fatigue in Chinese patients with newly diagnosed meningiomas: Prevalence, severity and associated factors. Neuropsychol Rehabil 2023; 33:1564-1581. [PMID: 36059235 DOI: 10.1080/09602011.2022.2115518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 08/16/2022] [Indexed: 10/14/2022]
Abstract
OBJECTIVE The purpose of this study was to explore the prevalence, severity, and factors associated with multidimensional fatigue in Chinese patients with newly diagnosed meningiomas. METHODS This cross-sectional study included 120 Chinese meningioma patients. Data were collected before surgery, including demographic, clinical, psychological, and sleep characteristics, as well as fatigue scores based on completion of the Multidimensional Fatigue Inventory (MFI-20). Mann-Whitney U tests, Kruskal-Wallis H tests, Spearman correlation and multiple linear regression were used to analyze the data. RESULTS The results showed there was a high prevalence of severe fatigue for each dimension: general fatigue (33.3%), physical fatigue (27.5%), reduced activity (28.3%), reduced motivation (12.5%), mental fatigue (11.7%), and total fatigue (23.3%). Headache and anxiety were found to be associated with general fatigue. Depression was related with physical fatigue. The Karnofsky Performance Status (KPS) score and depression were associated with reduced activity. Depression and the Epworth Sleepiness Scale (ESS) score were correlated with reduced motivation, while the KPS score and anxiety were associated with mental fatigue. Importantly, comorbidity, the KPS score, headache, depression, sleep disturbances, and the ESS score remained strong correlates of total fatigue. CONCLUSIONS Our findings indicate that newly diagnosed meningioma patients are affected by multidimensional fatigue. For patients with risk factors of fatigue, targeted interventions are advised to decrease fatigue and improve HRQoL.
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Affiliation(s)
- Dandan Zhang
- Department of Nursing, Nantong Health College of Jiangsu Province, Nantong, People's Republic of China
| | - Xiaomei Zhang
- Department of Neurosurgery, Affiliated Hospital of Nantong University, Nantong University, Nantong, People's Republic of China
| | - Qian Wu
- Department of Neurosurgery, Affiliated Hospital of Nantong University, Nantong University, Nantong, People's Republic of China
| | - Zhifeng Gu
- Department of Rheumatology, Affiliated Hospital of Nantong University, Nantong, People's Republic of China
| | - Chen Dong
- Department of Rheumatology, Affiliated Hospital of Nantong University, Nantong, People's Republic of China
| | - Xixi Gu
- Department of Nursing, Affiliated Hospital of Nantong University, Nantong University, Nantong, People's Republic of China
| | - Rong Li
- Department of Nursing, Affiliated Hospital of Nantong University, Nantong University, Nantong, People's Republic of China
| | - Zhiying Zong
- Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong University, Nantong, People's Republic of China
| | - Liren Li
- Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong University, Nantong, People's Republic of China
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Ferreira MEC, Carmo EC, Frota-Júnior LS, de Sousa Fortes L. Head-to-head opponent mitigates mental fatigue effects during a 20-km time trial in well-trained cyclists. Scand J Med Sci Sports 2023; 33:1984-1997. [PMID: 37394879 DOI: 10.1111/sms.14445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 05/25/2023] [Accepted: 06/20/2023] [Indexed: 07/04/2023]
Abstract
We aimed to analyze the effect of a head-to-head virtual race on 20-km time trial performance in well-trained mentally fatigued cyclists. A total of 24 male professional cyclists participated in the present study, which was conducted in a within-factors design [four experimental conditions × four times (throughout 20-km time trial cycling)]. An avatar representing the participant on the racecourse was visible during the time trials. Then, a second virtual avatar representing the opponent was projected onto the screen in the mental fatigue head-to-head and control head-to-head experimental conditions. Measurements [rating of perceived exertion, heart rate, and eye-tracking measures (i.e., pupil diameter)] were performed every 5-km throughout the 20-km time trial. As a result, impaired total time, power output, and cadence throughout the 20-km cycling time trial were found for mental fatigue compared to mental fatigue head-to-head, control head-to-head, and control conditions (p < 0.05). Also, impaired 20-km time trial performance (total time, power output, and cadence) was found for mental fatigue head-to-head compared to control head-to-head (p < 0.05). Moreover, lower RPE was found for the control and control head-to-head conditions than mental fatigue head-to-head and mental fatigue experimental conditions (p < 0.05). Higher pupil diameter was also found for mental fatigue head-to-head, control head-to-head, and control than the mental fatigue experimental condition (p < 0.05). In summary, the overall performance throughout the 20-km cycling time trial was improved by the presence of a virtual opponent for the mentally fatigued cyclists.
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Affiliation(s)
| | | | - Luiz Solon Frota-Júnior
- Associate Graduate Program of Physical Education of the Federal University of Paraíba, Paraíba, Brazil
| | - Leonardo de Sousa Fortes
- Associate Graduate Program of Physical Education of the Federal University of Paraíba, Paraíba, Brazil
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Faro H, Cavalcante Silva D, Barbosa BT, Costa YPD, Freitas-Junior CG, de Lima-Junior D, Faubert J, Fortes LDS. Young Basketball Players' Multiple Object Tracking Skills Were Unaffected by Stroop-Induced Mental Fatigue. Percept Mot Skills 2023; 130:2161-2176. [PMID: 37464728 DOI: 10.1177/00315125231189091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
We aimed to examine the acute effect of mental fatigue on young basketball players' three-dimensional multiple object tracking (3D-MOT) skills. Our participants were 12 adolescent basketball players (M age = 16.66, SD = 1.87 years; M years of practice = 2.66, SD = 1.07 years). In nine lab visits, we used visits 1 to 7 to familiarize participants with 3D-MOT, a subjective scale of mental fatigue, and a Stroop task involving mental set shifting. In the last two visits, participants performed in both experimental (EXP) and control (CON) conditions that were presented in randomized order. In the EXP condition, participants performed 3D-MOT pre- and post-60 minutes of induced mental fatigue; in the CON condition, they watched a documentary. After each condition, B participants performed the National Aeronautics and Space Administration Task Load Index (NASA-TLX). 3D-MOT performance measures were the "score" and "fastest trial score success." The response time on the Stroop tasks increased throughout the mental fatigue inducement in the experimental condition (p = .0037). The NASA-TLX responses were higher following the EXP condition than following the CON condition for mental demand, temporal demand, and performance (all ps < .05). Still, there were no significant EXP versus CON differences on the 3D-MOT performance indicators.
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Affiliation(s)
- Heloiana Faro
- Associated Gratuate Program of Physical Education, Federal University of Paraíba, João Pessoa, Brazil
| | - Douglas Cavalcante Silva
- Associated Gratuate Program of Physical Education, Federal University of Paraíba, João Pessoa, Brazil
| | - Bruno Teixeira Barbosa
- Associated Gratuate Program of Physical Education, Federal University of Paraíba, João Pessoa, Brazil
| | - Yago Pessoa da Costa
- Cognitive Neuroscience and Behavior Postgraduate Program, Federal University of Paraíba, João Pessoa, Brazil
| | | | | | | | - Leonardo de Sousa Fortes
- Associated Gratuate Program of Physical Education, Federal University of Paraíba, João Pessoa, Brazil
- Cognitive Neuroscience and Behavior Postgraduate Program, Federal University of Paraíba, João Pessoa, Brazil
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HOLGADO DARÍAS, JOLIDON LÉO, BORRAGÁN GUILLERMO, SANABRIA DANIEL, PLACE NICOLAS. Individualized Mental Fatigue Does Not Impact Neuromuscular Function and Exercise Performance. Med Sci Sports Exerc 2023; 55:1823-1834. [PMID: 37227196 PMCID: PMC10487395 DOI: 10.1249/mss.0000000000003221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
INTRODUCTION Recent studies have questioned previous empirical evidence that mental fatigue negatively impacts physical performance. The purpose of this study was to investigate the critical role of individual differences in mental fatigue susceptibility by analyzing the neurophysiological and physical responses to an individualized mental fatigue task. METHODS In a preregistered ( https://osf.io/xc8nr/ ), randomized, within-participant design experiment, 22 recreational athletes completed a time to failure test at 80% of their peak power output under mental fatigue (individual mental effort) or control (low mental effort). Before and after the cognitive tasks, subjective feeling of mental fatigue, neuromuscular function of the knee extensors, and corticospinal excitability were measured. Sequential Bayesian analysis until it reached strong evidence in favor of the alternative hypothesis (BF 10 > 6) or the null hypothesis (BF 10 < 1/6) were conducted. RESULTS The individualized mental effort task resulted in a higher subjective feeling of mental fatigue in the mental fatigue condition (0.50 (95% confidence interval (CI), 0.39-0.62)) arbitrary units compared with control (0.19 (95% CI, 0.06-0.339)) arbitrary unit. However, exercise performance was similar in both conditions (control: 410 (95% CI, 357-463) s vs mental fatigue: 422 (95% CI, 367-477) s, BF 10 = 0.15). Likewise, mental fatigue did not impair knee extensor maximal force-generating capacity (BF 10 = 0.928) and did not change the extent of fatigability or its origin after the cycling exercise. CONCLUSIONS There is no evidence that mental fatigue adversely affects neuromuscular function or physical exercise; even if mental fatigue is individualized, computerized tasks seem not to affect physical performance.
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Affiliation(s)
- DARÍAS HOLGADO
- Mind, Brain & Behavior Research Center, University of Granada, SPAIN
- Department of Experimental Psychology, University of Granada, SPAIN
- Institute of Sport Sciences, University of Lausanne, Quartier UNIL-Centre, Bâtiment Synathlon, Lausanne, SWITZERLAND
| | - LÉO JOLIDON
- Institute of Sport Sciences, University of Lausanne, Quartier UNIL-Centre, Bâtiment Synathlon, Lausanne, SWITZERLAND
| | - GUILLERMO BORRAGÁN
- UR2NF, Neuropsychology and Functional Neuroimaging Research Unit at CRCN, Centre de Recherches en Cognition et Neurosciences and UNI—ULB Neurosciences Institute, Université Libre de Bruxelles (ULB), Belgium, Brussels, BELGIUM
| | - DANIEL SANABRIA
- Mind, Brain & Behavior Research Center, University of Granada, SPAIN
- Department of Experimental Psychology, University of Granada, SPAIN
| | - NICOLAS PLACE
- Institute of Sport Sciences, University of Lausanne, Quartier UNIL-Centre, Bâtiment Synathlon, Lausanne, SWITZERLAND
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Piche E, Gerus P, Zory R, Jaafar A, Guerin O, Chorin F. Effects of muscular and mental fatigue on spatiotemporal gait parameters in dual task walking in young, non-frail and frail older adults. Aging Clin Exp Res 2023; 35:2109-2118. [PMID: 37535312 DOI: 10.1007/s40520-023-02506-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 07/12/2023] [Indexed: 08/04/2023]
Abstract
BACKGROUND Dual-task (DT) walking is of great interest in clinical evaluation to evaluate frailty or cognitive declines in older adults. Frail older adults are known to adopt different walking strategy to overcome fatigue. However, no studies evaluated the effect of muscular or mental fatigue on dual-task walking strategy and the difference between frail and non-frail older adults. AIMS Evaluate the effect of mental and muscular fatigue on spatio-temporal parameters in dual-task walking in young, non-frail and frail older adults. METHODS 59 participants divided into 20 young (Y) (24.9 ± 3 years old), 20 non-frail (NF) (75.8 ± 4.9 years old) and 19 frail older adults (F) (81 ± 4.7 years old) performed single-task (ST) walking, single-task cognitive (serial subtraction of 3), and dual-task (subtraction + walking) for 1 min at their fast pace. Gait speed, step length, step length variability, stance and swing phase time, single and double support time, cadence, gait speed variability were recorded in single- and dual-task walking. The dual-task effect (DTE) was calculated as ((DT - ST)/ST) × 100). Generalized linear mixed models (GLMM) were used to compare the effects of mental and muscular fatigue on gait and cognitive variables between the groups. RESULTS The DTE walking parameters were worse in F compared to NF or Y but no significant effect of fatigue were highlighted except for swing time and single support time DTEs. CONCLUSIONS The results were mitigated but a clear difference in dual-task spatio-temporal parameters was found between F and NF which brings hope into the capacity of DT to better reveal frailty.
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Affiliation(s)
- Elodie Piche
- Université Côte d'Azur, LAMHESS, Nice, France.
- Université Côte d'Azur, Centre Hospitalier Universitaire de Nice, Clinique Gériatrique du Cerveau et du Mouvement, Nice, France.
| | | | - Raphaël Zory
- Université Côte d'Azur, LAMHESS, Nice, France
- Institut Universitaire de France, Paris, France
| | - Amyn Jaafar
- Université Côte d'Azur, Centre Hospitalier Universitaire de Nice, Clinique Gériatrique du Cerveau et du Mouvement, Nice, France
| | - Olivier Guerin
- Université Côte d'Azur, Centre Hospitalier Universitaire de Nice, Clinique Gériatrique du Cerveau et du Mouvement, Nice, France
- Université Côte d'Azur, CNRS UMR 7284/INSERM U108, Institute for Research on Cancer and Aging Nice (IRCAN), Faculté de médecine, Nice, France
| | - Frédéric Chorin
- Université Côte d'Azur, LAMHESS, Nice, France
- Université Côte d'Azur, Centre Hospitalier Universitaire de Nice, Clinique Gériatrique du Cerveau et du Mouvement, Nice, France
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Hatsukawa H, Ishikawa M. Psychological states affecting initial pupil size changes after olfactory stimulation in healthy participants. Sci Rep 2023; 13:16050. [PMID: 37749199 PMCID: PMC10520065 DOI: 10.1038/s41598-023-43004-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 09/18/2023] [Indexed: 09/27/2023] Open
Abstract
Odor perception affects physiological and psychological states. Pupillary light reflex (PLR) parameters can be affected by olfactory stimulation and psychological states, although it remains unclear whether the olfactory stimulation-induced psychological changes can associate with PLR parameter changes. This study aimed to investigate effects of olfactory stimulation-induced psychological changes on PLR parameter changes with repeated measurements. We collected data on six mood subscales of the profile of mood states, and on five PLR parameter measurements from 28 healthy participants. Participants underwent a 10-min olfactory stimulation on different days with six odorants available with the T&T olfactometer. As obtained data were clustered, we used linear mixed-effects models for statistical analyses. The olfactory stimulation using the no-odor liquid did not affect mood states and the initial pupil size (INIT). The sweat odorant worsened all mood subscales including fatigue-inertia (Fatigue)/Vigor-Activity (Vigor), and decreased INIT compared to the no-odor liquid. When comparing INIT responses related to changes in mood subscales between the no-odor liquid and the sweat odorant, worsened states of Fatigue/Vigor were associated with decreased INIT in the sweat odorant. Fatigue/Vigor can be used as mental fatigue indicators. Thus, mental fatigue can be associated with decreased INIT in the olfactory stimulation.
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Affiliation(s)
- Hiroatsu Hatsukawa
- Department of Otolaryngology, Head and Neck Surgery, Hyogo Prefectural Amagasaki General Medical Center, 2-17-77 Higashinaniwachou, Amagasaki, Hyogo Prefecture, 660-8550, Japan
| | - Masaaki Ishikawa
- Department of Otolaryngology, Head and Neck Surgery, Hyogo Prefectural Amagasaki General Medical Center, 2-17-77 Higashinaniwachou, Amagasaki, Hyogo Prefecture, 660-8550, Japan.
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Eggart M, Valdés-Stauber J, Müller-Oerlinghausen B, Heinze M. Dysfunctional self-reported interoception predicts residual symptom burden of fatigue in major depressive disorder: an observational study. BMC Psychiatry 2023; 23:667. [PMID: 37700276 PMCID: PMC10498532 DOI: 10.1186/s12888-023-05168-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 09/05/2023] [Indexed: 09/14/2023] Open
Abstract
BACKGROUND Fatigue is a core symptom of major depressive disorder (MDD) and is frequently refractory to antidepressant treatment, leading to unfavorable clinical/psychosocial outcomes. Dysfunctional self-reported interoception (i.e., maladaptive focus on the body's physiological condition) is prevalent in MDD and could contribute to residual symptom burden of fatigue. Therefore, we explored (a.) cross-sectional correlations between both dimensions and investigated (b.) prospective associations between interoceptive impairments at admission and symptom severity of fatigue at the end of hospitalization. METHODS This observational, exploratory study included 87 patients suffering from MDD who completed self-rating scales, the Multidimensional Assessment of Interoceptive Awareness, Version 2 (MAIA-2), and the Multidimensional Fatigue Inventory (MFI-20), at the beginning and end of hospitalization. Bivariate correlations (r) and hierarchical regression analyses were performed. RESULTS The cross-sectional analysis showed moderate to large negative correlations between the MAIA-2 and MFI-20 dimensions except for the Not-Distracting scale. Symptoms of general, physical, and mental fatigue at the end of hospitalization were predicted by reduced body Trusting (β = -.31, p = .01; β = -.28, p = .02; β = -.31, p = .00, respectively). Increased Body Listening (β = .37, p = .00), Not-Worrying (β = .26, p = .02), and diminished Attention Regulation (β = -.32, p = .01) predicted higher mental fatigue. CONCLUSIONS Diminished body confidence at baseline identified patients at risk for post-treatment fatigue and could therefore serve as a target for improving antidepressant therapy. Body-centered, integrative approaches could address treatment-resistant fatigue in MDD. However, clinicians may also consider the potential adverse effect of increased Body Listening and Not-Worrying on mental fatigue in psychotherapeutic and counselling approaches. Due to the exploratory nature of this study, the results are preliminary and need to be replicated in pre-registered trials with larger sample sizes.
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Affiliation(s)
- Michael Eggart
- Faculty of Health Sciences, Brandenburg Medical School Theodor Fontane, Neuruppin, 16816, Germany.
- Department of Psychiatry and Psychotherapy I, Ulm University and Center for Psychiatry Südwürttemberg, Ravensburg, 88214, Germany.
- Faculty Social Work, Health and Nursing, Ravensburg-Weingarten University of Applied Sciences, Weingarten, 88250, Germany.
| | - Juan Valdés-Stauber
- Department of Psychiatry and Psychotherapy I, Ulm University and Center for Psychiatry Südwürttemberg, Ravensburg, 88214, Germany
| | - Bruno Müller-Oerlinghausen
- Faculty of Medicine and Psychology, Brandenburg Medical School Theodor Fontane, Neuruppin, 16816, Germany
- Charité - Universitätsmedizin Berlin, Berlin, 10117, Germany
| | - Martin Heinze
- Faculty of Health Sciences, Brandenburg Medical School Theodor Fontane, Neuruppin, 16816, Germany
- Faculty of Medicine and Psychology, Brandenburg Medical School Theodor Fontane, Neuruppin, 16816, Germany
- Department of Psychiatry and Psychotherapy, Brandenburg Medical School Theodor Fontane, Immanuel Klinik Rüdersdorf, Rüdersdorf, 15562, Germany
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45
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Lam HKN, Sproule J, Turner AP, Phillips SM. The impact of sprint, middle-distance, and long-distance orienteering races on perceived mental fatigue in national level orienteers. J Sports Sci 2023; 41:1423-1436. [PMID: 37885048 DOI: 10.1080/02640414.2023.2273097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 10/12/2023] [Indexed: 10/28/2023]
Abstract
Experiencing mental fatigue (MF) before an orienteering race can lead to a slower completion time. This study aimed to explore the changes in perceived MF, mood and other psychological responses during an orienteering competition. Sixteen national level orienteering athletes (20.8 ± 4.9 years) provided informed consent and completed the online surveys, before and immediately after each race, and 24- and 48-hours post competition (48POST). This study measured MF, physical fatigue, stress, tiredness and motivation using 0-100 Visual Analogue Scale, and the mood was assessed using The Brunel Mood Scale (BRUMS). A moderate to large increase in MF (ES = 0.93 [0.54 to 1.31]), BRUMS fatigue (ES = 0.61 [0.3 to 0.92]), and PF (ES = 1.21 [0.81 to 1.61]) was reported following orienteering races. A small increase in tiredness and BRUMS confusion, and a small decrease in motivation, stress and BRUMS vigour was also reported. There was a delay in recovering from the MF elicited by competition, with a small increase in MF (ES = 0.54 [0.08 to 1.15]) at 48POST compared to the pre-competition value. This study found that orienteers experience MF during competition and have a delayed recovery that can last up to two days after the competition.
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Affiliation(s)
- Hui Kwan Nicholas Lam
- Human Performance Science Research Group, The University of Edinburgh, Edinburgh, UK
| | - John Sproule
- Human Performance Science Research Group, The University of Edinburgh, Edinburgh, UK
| | - Anthony P Turner
- Human Performance Science Research Group, The University of Edinburgh, Edinburgh, UK
| | - Shaun M Phillips
- Human Performance Science Research Group, The University of Edinburgh, Edinburgh, UK
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Bark L, Larsson IM, Wallin E, Simrén J, Zetterberg H, Lipcsey M, Frithiof R, Rostami E, Hultström M. Central nervous system biomarkers GFAp and NfL associate with post-acute cognitive impairment and fatigue following critical COVID-19. Sci Rep 2023; 13:13144. [PMID: 37573366 PMCID: PMC10423244 DOI: 10.1038/s41598-023-39698-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 07/29/2023] [Indexed: 08/14/2023] Open
Abstract
A high proportion of patients with coronavirus disease 2019 (COVID-19) experience post-acute COVID-19, including neuropsychiatric symptoms. Objective signs of central nervous system (CNS) damage can be investigated using CNS biomarkers such as glial fibrillary acidic protein (GFAp), neurofilament light chain (NfL) and total tau (t-tau). We have examined whether CNS biomarkers can predict fatigue and cognitive impairment 3-6 months after discharge from the intensive care unit (ICU) in critically ill COVID-19 patients. Fifty-seven COVID-19 patients admitted to the ICU were included with analysis of CNS biomarkers in blood at the ICU and at follow up. Cognitive dysfunction and fatigue were assessed with the Montreal Cognitive Assessment (MoCA) and the Multidimensional Fatigue inventory (MFI-20). Elevated GFAp at follow-up 3-6 months after ICU discharge was associated to the development of mild cognitive dysfunction (p = 0.01), especially in women (p = 0.005). Patients who experienced different dimensions of fatigue at follow-up had significantly lower GFAp in both the ICU and at follow-up, specifically in general fatigue (p = 0.009), physical fatigue (p = 0.004), mental fatigue (p = 0.001), and reduced motivation (p = 0.001). Women showed a more pronounced decrease in GFAp compared to men, except for in mental fatigue where men showed a more pronounced GFAp decrease compared to women. NfL concentration at follow-up was lower in patients who experienced reduced motivation (p = 0.004). Our findings suggest that GFAp and NfL are associated with neuropsychiatric outcome after critical COVID-19.Trial registration The study was registered à priori (clinicaltrials.gov: NCT04316884 registered on 2020-03-13 and NCT04474249 registered on 2020-06-29).
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Affiliation(s)
- Lovisa Bark
- Anaesthesiology and Intensive Care Medicine, Department of Surgical Sciences, Uppsala University Hospital, Uppsala University, Entr. 70, Floor 2, 75185, Uppsala, Sweden.
| | - Ing-Marie Larsson
- Anaesthesiology and Intensive Care Medicine, Department of Surgical Sciences, Uppsala University Hospital, Uppsala University, Entr. 70, Floor 2, 75185, Uppsala, Sweden
| | - Ewa Wallin
- Anaesthesiology and Intensive Care Medicine, Department of Surgical Sciences, Uppsala University Hospital, Uppsala University, Entr. 70, Floor 2, 75185, Uppsala, Sweden
| | - Joel Simrén
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden
- Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| | - Henrik Zetterberg
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden
- Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
- Department of Neurodegenerative Disease, UCL Institute of Neurology, Queen Square, London, UK
- UK Dementia Research Institute at UCL, London, UK
- Hong Kong Center for Neurodegenerative Diseases, Clear Water Bay, Hong Kong, China
| | - Miklos Lipcsey
- Anaesthesiology and Intensive Care Medicine, Department of Surgical Sciences, Uppsala University Hospital, Uppsala University, Entr. 70, Floor 2, 75185, Uppsala, Sweden
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - Robert Frithiof
- Anaesthesiology and Intensive Care Medicine, Department of Surgical Sciences, Uppsala University Hospital, Uppsala University, Entr. 70, Floor 2, 75185, Uppsala, Sweden
| | - Elham Rostami
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Michael Hultström
- Anaesthesiology and Intensive Care Medicine, Department of Surgical Sciences, Uppsala University Hospital, Uppsala University, Entr. 70, Floor 2, 75185, Uppsala, Sweden
- Integrative Physiology, Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montréal, QC, Canada
- Lady Davis Institute of Medical Research, Jewish General Hospital, Montréal, QC, Canada
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Ishikura T, Nakano T, Kitano T, Tokuda T, Sumi-Akamaru H, Naka T. Serum ferritin level during hospitalization is associated with Brain Fog after COVID-19. Sci Rep 2023; 13:13095. [PMID: 37567939 PMCID: PMC10421912 DOI: 10.1038/s41598-023-40011-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 08/03/2023] [Indexed: 08/13/2023] Open
Abstract
The coronavirus disease 2019 (COVID-19) remains an epidemic worldwide. Most patients suffer residual symptoms, the so-called "Long COVID," which includes respiratory and neuropsychiatric symptoms. Brain Fog, one of the symptoms of Long COVID, is a major public health issue because it can impair patients' quality of life even after recovery from the disease. However, neither the pathogenesis nor the treatment of this condition remains unknown. We focused on serum ferritin levels in this study and collected information on the onset of Brain Fog through questionnaires and found that high ferritin levels during hospitalization were associated with the occurrence of Brain Fog. In addition, we excluded confounders as far as possible using propensity score analyses and found that ferritin was independently associated with Brain Fog in most of the models. We conducted phase analysis and evaluated the interaction of each phase with ferritin levels and Brain Fog. We found a positive correlation between serum ferritin levels during hospitalization and Brain Fog after COVID-19. High ferritin levels in patients with Brain Fog may reflect the contribution of chronic inflammation in the development of Brain Fog. This study provides a novel insight into the pathogenic mechanism of Brain Fog after COVID-19.
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Affiliation(s)
- Teruyuki Ishikura
- Department of Neurology, Higashiosaka City Medical Center, 3-4-5 Nishiiwata, Higashiosaka, Osaka, 578-8588, Japan.
- Department of Molecular Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.
| | - Tomohito Nakano
- Department of Neurology, Higashiosaka City Medical Center, 3-4-5 Nishiiwata, Higashiosaka, Osaka, 578-8588, Japan
| | - Takaya Kitano
- Department of Neurology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- Krembil Research Institute, Toronto Western Hospital, University Health Network, Toronto, ON, Canada
| | - Takechiyo Tokuda
- Department of Neurology, Higashiosaka City Medical Center, 3-4-5 Nishiiwata, Higashiosaka, Osaka, 578-8588, Japan
| | - Hisae Sumi-Akamaru
- Department of Neurology, Higashiosaka City Medical Center, 3-4-5 Nishiiwata, Higashiosaka, Osaka, 578-8588, Japan
| | - Takashi Naka
- Department of Neurology, Higashiosaka City Medical Center, 3-4-5 Nishiiwata, Higashiosaka, Osaka, 578-8588, Japan
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48
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Alix-Fages C, Jiménez-Martínez P, de Oliveira DS, Möck S, Balsalobre-Fernández C, Del Vecchio A. Mental fatigue impairs physical performance but not the neural drive to the muscle: a preliminary analysis. Eur J Appl Physiol 2023; 123:1671-1684. [PMID: 36988671 DOI: 10.1007/s00421-023-05189-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 03/22/2023] [Indexed: 03/30/2023]
Abstract
Mental fatigue (MF) does not only affect cognitive but also physical performance. This study aimed to explore the effects of MF on muscle endurance, rate of perceived exertion (RPE), and motor units' activity. Ten healthy males participated in a randomised crossover study. The subjects attended two identical experimental sessions separated by 3 days with the only difference of a cognitive task (incongruent Stroop task [ST]) and a control condition (watching a documentary). Perceived MF and motivation were measured for each session at baseline and after each cognitive task. Four contractions at 20% of maximal voluntary contraction (MVIC) were performed at baseline, after each cognitive and after muscle endurance task while measuring motor units by high-density surface electromyography. Muscle endurance until failure at 50% of MVIC was measured after each cognitive task and the RPE was measured right after failure. ST significantly increased MF (p = 0.001) reduced the motivation (p = 0.008) for the subsequent physical task and also impaired physical performance (p = 0.044). However, estimates of common synaptic inputs and motor unit discharge rates as well as RPE were not affected by MF (p > 0.11). In conclusion, MF impairs muscle endurance and motivation for the physical task but not the neural drive to the muscle at any frequency bands. Although it is physiologically possible for mentally fatigued subjects to generate an optimal neuromuscular function, the altered motivation seems to limit physical performance. Preliminarily, our results suggest that the corticospinal pathways are not affected by MF.
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Affiliation(s)
- Carlos Alix-Fages
- Applied Biomechanics and Sport Technology Research Group, Autonomous University of Madrid, C/ Fco Tomas Y Valiente 3, Cantoblanco, 28049, Madrid, Spain.
- ICEN Institute, Madrid, Spain.
- Research Group in Prevention and Health in Exercise and Sport (PHES), University of Valencia, Valencia, Spain.
| | - Pablo Jiménez-Martínez
- ICEN Institute, Madrid, Spain
- Research Group in Prevention and Health in Exercise and Sport (PHES), University of Valencia, Valencia, Spain
| | - Daniela Souza de Oliveira
- Department Artificial Intelligence in Biomedical Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestraße 91, 91052, Erlangen, Germany
| | - Sebastian Möck
- Department of Exercise Science, Olympic Training and Testing Center of Hessen, Frankfurt Am Main, Germany
| | - Carlos Balsalobre-Fernández
- Applied Biomechanics and Sport Technology Research Group, Autonomous University of Madrid, C/ Fco Tomas Y Valiente 3, Cantoblanco, 28049, Madrid, Spain
| | - Alessandro Del Vecchio
- Department Artificial Intelligence in Biomedical Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestraße 91, 91052, Erlangen, Germany.
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Bloomfield PM, Fisher JP, Shaw DM, Gant N. Cocoa flavanols protect cognitive function, cerebral oxygenation, and mental fatigue during severe hypoxia. J Appl Physiol (1985) 2023; 135:475-484. [PMID: 37471213 DOI: 10.1152/japplphysiol.00219.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 07/06/2023] [Accepted: 07/06/2023] [Indexed: 07/22/2023] Open
Abstract
We tested the hypothesis that ingestion of cocoa flavanols would improve cognition during acute hypoxia equivalent to 5,500 m altitude (partial pressure of end-tidal oxygen = 45 mmHg). Using placebo-controlled double-blind trials, 12 participants ingested 15 mg·kg-1 of cocoa flavanols 90 min before completing cognitive tasks during normoxia and either poikilocapnic or isocapnic hypoxia (partial pressure of end-tidal carbon dioxide uncontrolled or maintained at the baseline value, respectively). Cerebral oxygenation was measured using functional near-infrared spectroscopy. Overall cognition was impaired by poikilocapnic hypoxia (main effect of hypoxia, P = 0.008). Cocoa flavanols improved a measure of overall cognitive performance by 4% compared with placebo (effect of flavanols, P = 0.033) during hypoxia, indicating a change in performance from "low average" to "average." The hypoxia-induced decrease in cerebral oxygenation was two-fold greater with placebo than with cocoa flavanols (effect of flavanols, P = 0.005). Subjective fatigue was increased by 900% with placebo compared with flavanols during poikilocapnic hypoxia (effect of flavanols, P = 0.004). Overall cognition was impaired by isocapnic hypoxia (effect of hypoxia, P = 0.001) but was not improved by cocoa flavanols (mean improvement = 1%; effect of flavanols, P = 0.72). Reaction time was impaired by 8% with flavanols during normoxia and further impaired by 11% during isocapnic hypoxia (effect of flavanols, P = 0.01). Our findings are the first to show that flavanol-mediated improvements in cognition and mood during normoxia persist during severe oxygen deprivation, conferring a neuroprotective effect.NEW & NOTEWORTHY We show for the first time that cocoa flavanols exert a neuroprotective effect during severe hypoxia. Following acute cocoa flavanol ingestion, we observed improvements in cognition, cerebral oxygenation, and subjective fatigue during normoxia and severe poikilocapnic hypoxia. Cocoa flavanols did not improve cognition during severe isocapnic hypoxia, suggesting a possible interaction with carbon dioxide.
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Affiliation(s)
- Peter M Bloomfield
- Exercise Neurometabolism Laboratory, University of Auckland, Auckland, New Zealand
| | - James P Fisher
- Department of Physiology, Faculty of Medical & Health Sciences, Manaaki Mānawa - The Centre for Heart Research, University of Auckland, Auckland, New Zealand
| | - David M Shaw
- Aviation Medicine Unit, Royal New Zealand Air Force Base Auckland, Whenuapai, Auckland, New Zealand
| | - Nicholas Gant
- Exercise Neurometabolism Laboratory, University of Auckland, Auckland, New Zealand
- Centre for Brain Research, University of Auckland, Auckland, New Zealand
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50
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Daub BD, McLean BD, Heishman AD, Peak KM, Coutts AJ. Impacts of mental fatigue and sport specific film sessions on basketball shooting tasks. Eur J Sport Sci 2023; 23:1500-1508. [PMID: 36584309 DOI: 10.1080/17461391.2022.2161421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
PURPOSE The aim of this investigation was to examine the impact of mental fatigue on basketball specific shooting performance, utilising the newly developed basketball Standardized Shooting Task (SST). METHODS Fifteen male elite NCAA Division 1 collegiate basketball players (Age 20.2 ± 1.2 y, height 199.3 ± 7.1 cm, body mass 93.1 ± 8.6 kg) volunteered to participate in a randomised, counterbalanced crossover design undergoing three conditions (Control, Stroop, and Film). The task, performed on three consecutive days, was comprised of 60 free throw attempts followed by a 4-minute spot-to-spot shooting. RESULTS Visual Analog Scales revealed significantly higher levels of mental fatigue following the Stroop (54.2 ± 24.5) condition compared to the Control (24.5 ± 16.2) and higher levels of mental effort in the Stroop (61.0 ± 31.3) and Film (49.9 ± 27.7) compared to the Control (14.0 ± 18.5). No significant differences were observed for Motivation among groups (p > 0.05). There was a significant decrease (p = 0.006) in number of shots made in 4-minutes (MAKE4MIN; control = 49.5 ± 10.2, Stroop = 44.0 ± 10.6, and Film = 45.1 ± 11.7) and shots missed in 4-minutes (MISS4MIN; control = 27.3 ± 7.0, Stroop = 30.9 ± 7.1, and Film = 30.9 ± 7.6). No significant differences were detected for any other performance variables. CONCLUSION These data demonstrate that mental fatigue negatively impacts basketball shooting performance in elite collegiate basketball players. We suggest that practitioners and coaches encourage athletes to abstain from cognitively demanding tasks prior to basketball competition.
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Affiliation(s)
- Bryce D Daub
- University of Technology Sydney, School of Sport, Exercise and Rehabilitation, Sydney, Australia
- Department of Athletics, Basketball Strength and Performance, University of Oklahoma, Norman, OK, USA
| | - Blake D McLean
- University of Technology Sydney, School of Sport, Exercise and Rehabilitation, Sydney, Australia
- Oklahoma City Thunder Professional Basketball Club, Human and Player Performance, Oklahoma City, OK, USA
| | - Aaron D Heishman
- Department of Athletics, Basketball Strength and Performance, University of Oklahoma, Norman, OK, USA
- Vegas Golden Knights Professional Hockey Club, Las Vegas, USA
| | - Keldon M Peak
- Department of Athletics, Basketball Strength and Performance, University of Oklahoma, Norman, OK, USA
| | - Aaron J Coutts
- University of Technology Sydney, School of Sport, Exercise and Rehabilitation, Sydney, Australia
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