1
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Coudert S, Jacq R, Bas AC. The evaluation of oral and dental health and behavioural risk among ultra-endurance athletes: a cross-sectional epidemiological study. Res Sports Med 2023; 31:802-810. [PMID: 35199625 DOI: 10.1080/15438627.2022.2042296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 02/09/2022] [Indexed: 10/19/2022]
Abstract
This study assessed for the first time the oral and dental health of ultra-trail athletes. We also confirmed and quantified the scale of their exposure to oral health risk factors. This was a cross-sectional study using data from a survey among runners who enlisted in the 2020 edition of the UT4M races (Ultra-Trail des 4 Massifs). The dental health of 84% of the participants was "good" or "very good". The nutritional intake during effort comprised foods liable to induce tooth decay (energy bars (55%), sugar-rich gels and fruit confectionary (40%)) and snacking was frequent (39%). More than 3/5 of runners saw a dentist for preventive check-ups. The more runners participate in races the more likely they are to have oral hygiene strategies during competitions (aOR = 1.85, p ≤ 0.05). The oral health of ultra-trail runners is better than that of the average French adult population. Regular dental hygiene and preventive dental consultations appear to counterbalance the risks that we evidenced.
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Affiliation(s)
- Suzanne Coudert
- Public Health Department, Faculty of Dentistry, Paris Cité University, Paris, France
| | - Romain Jacq
- APHP, Louis Mourier Hospital, Assistance Publique Des Hôpitaux de Paris, Colombes, France
| | - Anne-Charlotte Bas
- Public Health Department, Faculty of Dentistry, Paris Cité University, Paris, France
- Centre for Research in Epidemiology and Population Health, French National Institute of Health and Medical Research (INSERM U 1018), University Versailles Saint-Quentin en Yvelines, University Paris-Sud, Villejuif, France
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2
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Longman DP, Dolan E, Wells JCK, Stock JT. Patterns of energy allocation during energetic scarcity; evolutionary insights from ultra-endurance events. Comp Biochem Physiol A Mol Integr Physiol 2023; 281:111422. [PMID: 37031854 DOI: 10.1016/j.cbpa.2023.111422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 04/06/2023] [Accepted: 04/06/2023] [Indexed: 04/11/2023]
Abstract
Exercise physiologists and evolutionary biologists share a research interest in determining patterns of energy allocation during times of acute or chronic energetic scarcity.. Within sport and exercise science, this information has important implications for athlete health and performance. For evolutionary biologists, this would shed new light on our adaptive capabilities as a phenotypically plastic species. In recent years, evolutionary biologists have begun recruiting athletes as study participants and using contemporary sports as a model for studying evolution. This approach, known as human athletic palaeobiology, has identified ultra-endurance events as a valuable experimental model to investigate patterns of energy allocation during conditions of elevated energy demand, which are generally accompanied by an energy deficit. This energetic stress provokes detectable functional trade-offs in energy allocation between physiological processes. Early results from this modelsuggest thatlimited resources are preferentially allocated to processes which could be considered to confer the greatest immediate survival advantage (including immune and cognitive function). This aligns with evolutionary perspectives regarding energetic trade-offs during periods of acute and chronic energetic scarcity. Here, we discuss energy allocation patterns during periods of energetic stress as an area of shared interest between exercise physiology and evolutionary biology. We propose that, by addressing the ultimate "why" questions, namely why certain traits were selected for during the human evolutionary journey, an evolutionary perspective can complement the exercise physiology literature and provide a deeper insight of the reasons underpinning the body's physiological response to conditions of energetic stress.
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Affiliation(s)
- Daniel P Longman
- School of Sport, Health and Exercise Sciences, Loughborough University, Loughborough LE11 3TU, United Kingdom.
| | - Eimear Dolan
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Rheumatology Division, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Jonathan C K Wells
- Childhood Nutrition Research Centre, UCL Institute of Child Health, London WC1N 1EH, United Kingdom
| | - Jay T Stock
- Department of Archaeology, University of Cambridge, Cambridge CB2 3QG, United Kingdom; Department of Anthropology, University of Western Ontario, Ontario, Canada
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3
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Borchers J, Merle CL, Schöneborn DD, Lyko LR, Thouet T, Wolfarth B, Kottmann T, Scheibenbogen C, Zimmer J, Diederich S, Bauer K, Sack U, Schmalz G, Ziebolz D, Wüstenfeld J. Salivary Diagnostic for Monitoring Strenuous Exercise-A Pilot Study in a Cohort of Male Ultramarathon Runners. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:16110. [PMID: 36498185 PMCID: PMC9737684 DOI: 10.3390/ijerph192316110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/22/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
Intense physical stress, such as that in ultramarathon running, affects the immune system. For monitoring in sports medicine, non-invasive methods, e.g., salivary analysis, are of interest. This pilot cohort study aimed to assess changes in salivary parameters in response to an ultramarathon. The results were compared to blood parameters. Male, healthy finishers (n = 9, mean age: 48 ± 8.8 years, mean height: 1.8 ± 0.1 m, mean weight: 72.5 ± 7.2 kg, mean BMI: 23.5 ± 1.9 kg/cm²) of a 160 km ultramarathon were included. Saliva and blood samples were collected at three time points: T1 (baseline), T2 (shortly after the ultramarathon) and T3 (after recovery). In saliva, cortisol, testosterone, IL-1β, IL-6, IL-8, IL-10, TNF-α, albumin, IgA, α-amylase, aMMP-8, and neopterin were assessed via ELISA. In blood, cortisol, testosterone, IL-1β, IL-6, IL-8, IL-10, TNF-α, blood cell counts, procalcitonin, CRP, osmolality, albumin, and α-amylase were analyzed. The statistical evaluation comprised longitudinal testing and cross-sectional testing between saliva and blood using ratios of T2 and T3 to baseline values. Various parameters in saliva and blood changed in response to the ultramarathon. Comparing blood and saliva, the longitudinal changes of testosterone (p = 0.02) and α-amylase (p = 0.03) differed significantly. Despite the limitations of the study, it underlines that saliva is an interesting option for comprehensive monitoring in sports medicine and necessitates further studies.
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Affiliation(s)
- Josephin Borchers
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany
| | - Cordula Leonie Merle
- Department of Prosthetic Dentistry, UKR University Hospital Regensburg, 93053 Regensburg, Germany
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany
| | | | - Lea Ronja Lyko
- Department of Sports Medicine, Charité University Medicine, 10115 Berlin, Germany
| | - Thomas Thouet
- Department of Sports Medicine, Charité University Medicine, 10115 Berlin, Germany
| | - Bernd Wolfarth
- Department of Sports Medicine, Charité University Medicine, 10115 Berlin, Germany
- Department of Sports Medicine, Institute for Applied Scientific Training, 04109 Leipzig, Germany
- Institute of Sports Science, Humboldt University, 10115 Berlin, Germany
| | | | - Carmen Scheibenbogen
- Institute for Medical Immunology, Charité University Medicine, 13353 Berlin, Germany
| | - Jeannot Zimmer
- SYNLAB Medizinisches Versorgungszentrum Berlin GmbH, 10828 Berlin, Germany
| | | | - Katrin Bauer
- Institute of Clinical Immunology, Medical Faculty, University of Leipzig, 04103 Leipzig, Germany
| | - Ulrich Sack
- Institute of Clinical Immunology, Medical Faculty, University of Leipzig, 04103 Leipzig, Germany
| | - Gerhard Schmalz
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany
| | - Dirk Ziebolz
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany
| | - Jan Wüstenfeld
- Department of Sports Medicine, Charité University Medicine, 10115 Berlin, Germany
- Department of Sports Medicine, Institute for Applied Scientific Training, 04109 Leipzig, Germany
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Cheng L, Wang H, Han Y. Effects of caffeinated beverage ingestion on salivary antimicrobial proteins responses to acute exercise in the heat. Front Nutr 2022; 9:973003. [DOI: 10.3389/fnut.2022.973003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Accepted: 10/21/2022] [Indexed: 11/16/2022] Open
Abstract
Caffeine is commonly used by athletes as an energy supplement, but studies on its effects on salivary antimicrobial proteins (sAMPs) in humans during exercise are rare with ambiguous findings. It is also still controversial whether hot environments affect sAMPs. Using a double-blind, randomized crossover design, we examined 12 endurance-trained male collegiate athletes who completed the following two experiments: a caffeine experiment (CAF) and a placebo experiment (PLA). The participants acutely consumed caffeine-containing (6 mg/kg body weight) sports drink (3 ml/kg body weight) or an equivalent amount of placebo sports drink and subsequently performed cycling exercise for 40 min in the heat (33 ± 0.24°C, 64 ± 2.50% relative humidity) at 50% of maximum output power, maintaining a pedal frequency of 60 rpm. Saliva was collected at 60 min pre-exercise (T–60), the start of exercise (T0), 20 min of exercise (T20), and the end of the exercise (T40), and salivary α-amylase (sAA) and lactoferrin (sLac) were tested. The rating of perceived exertion (RPE) was measured at T0–T40, while core body temperature (Tre) and heart rate (HR) were monitored continuously. Tre, HR, and RPE increased with time during the exercise (p < 0.01), with no difference in Tre and HR between the CAF and PLA (p > 0.05), but RPE was higher in the PLA than in the CAF (p < 0.05). sLac concentrations were significantly higher at T20 and T40 than at T–60 (p < 0.01) and higher at T40 than at T0 and T20 (p < 0.01), with no difference between the CAF and PLA (p > 0.05). Compared with T–60, sAA activity was significantly increased at T0, T20, and T40 (p < 0.01). sAA activity was significantly higher at T40 than at T0 and T20 (p < 0.01), at T20 than at T0 (p < 0.05), and in the CAF than in the PLA (p < 0.01). Heat stress caused by acute exercise in hot environments did not impair the sAMPs parameters of the participants. Instead, the participants showed transient increase in sAA activity and unchanged sLac concentrations. Caffeine may increase salivary markers related to immune response during exercise.
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Baker C, Hunt J, Piasecki J, Hough J. Lymphocyte and dendritic cell response to a period of intensified training in young healthy humans and rodents: A systematic review and meta-analysis. Front Physiol 2022; 13:998925. [PMID: 36439269 PMCID: PMC9691956 DOI: 10.3389/fphys.2022.998925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 10/14/2022] [Indexed: 01/25/2023] Open
Abstract
Background: Intensified training coupled with sufficient recovery is required to improve athletic performance. A stress-recovery imbalance can lead to negative states of overtraining. Hormonal alterations associated with intensified training, such as blunted cortisol, may impair the immune response. Cortisol promotes the maturation and migration of dendritic cells which subsequently stimulate the T cell response. However, there are currently no clear reliable biomarkers to highlight the overtraining syndrome. This systematic review and meta-analysis examined the effect of intensified training on immune cells. Outcomes from this could provide insight into whether these markers may be used as an indicator of negative states of overtraining. Methods: SPORTDiscus, PUBMED, Academic Search Complete, Scopus and Web of Science were searched until June 2022. Included articles reported on immune biomarkers relating to lymphocytes, dendritic cells, and cytokines before and after a period of intensified training, in humans and rodents, at rest and in response to exercise. Results: 164 full texts were screened for eligibility. Across 57 eligible studies, 16 immune biomarkers were assessed. 7 were assessed at rest and in response to a bout of exercise, and 9 assessed at rest only. Included lymphocyte markers were CD3+, CD4+ and CD8+ T cell count, NK cell count, NK Cytolytic activity, lymphocyte proliferation and CD4/CD8 ratio. Dendritic cell markers examined were CD80, CD86, and MHC II expression. Cytokines included IL-1β, IL-2, IL-10, TNF-α and IFN-γ. A period of intensified training significantly decreased resting total lymphocyte (d= -0.57, 95% CI -0.30) and CD8+ T cell counts (d= -0.37, 95% CI -0.04), and unstimulated plasma IL-1β levels (d= -0.63, 95% CI -0.17). Resting dendritic cell CD86 expression significantly increased (d = 2.18, 95% CI 4.07). All other biomarkers remained unchanged. Conclusion: Although some biomarkers alter after a period of intensified training, definitive immune biomarkers are limited. Specifically, due to low study numbers, further investigation into the dendritic cell response in human models is required.
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Affiliation(s)
- Carla Baker
- SHAPE Research Centre, Department of Sport Science, Nottingham Trent University, Nottingham, United Kingdom,*Correspondence: Carla Baker,
| | - John Hunt
- Medical Technologies Innovation Facility, Nottingham Trent University, Nottingham, United Kingdom
| | - Jessica Piasecki
- SHAPE Research Centre, Department of Sport Science, Nottingham Trent University, Nottingham, United Kingdom
| | - John Hough
- SHAPE Research Centre, Department of Sport Science, Nottingham Trent University, Nottingham, United Kingdom
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Assessment of Exercise-Associated Gastrointestinal Perturbations in Research and Practical Settings: Methodological Concerns and Recommendations for Best Practice. Int J Sport Nutr Exerc Metab 2022; 32:387-418. [PMID: 35963615 DOI: 10.1123/ijsnem.2022-0048] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 05/26/2022] [Accepted: 07/07/2022] [Indexed: 12/14/2022]
Abstract
Strenuous exercise is synonymous with disturbing gastrointestinal integrity and function, subsequently prompting systemic immune responses and exercise-associated gastrointestinal symptoms, a condition established as "exercise-induced gastrointestinal syndrome." When exercise stress and aligned exacerbation factors (i.e., extrinsic and intrinsic) are of substantial magnitude, these exercise-associated gastrointestinal perturbations can cause performance decrements and health implications of clinical significance. This potentially explains the exponential growth in exploratory, mechanistic, and interventional research in exercise gastroenterology to understand, accurately measure and interpret, and prevent or attenuate the performance debilitating and health consequences of exercise-induced gastrointestinal syndrome. Considering the recent advancement in exercise gastroenterology research, it has been highlighted that published literature in the area is consistently affected by substantial experimental limitations that may affect the accuracy of translating study outcomes into practical application/s and/or design of future research. This perspective methodological review attempts to highlight these concerns and provides guidance to improve the validity, reliability, and robustness of the next generation of exercise gastroenterology research. These methodological concerns include participant screening and description, exertional and exertional heat stress load, dietary control, hydration status, food and fluid provisions, circadian variation, biological sex differences, comprehensive assessment of established markers of exercise-induced gastrointestinal syndrome, validity of gastrointestinal symptoms assessment tool, and data reporting and presentation. Standardized experimental procedures are needed for the accurate interpretation of research findings, avoiding misinterpreted (e.g., pathological relevance of response magnitude) and overstated conclusions (e.g., clinical and practical relevance of intervention research outcomes), which will support more accurate translation into safe practice guidelines.
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7
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Derman W, Badenhorst M, Eken MM, Ezeiza-Gomez J, Fitzpatrick J, Gleeson M, Kunorozva L, Mjosund K, Mountjoy M, Sewry N, Schwellnus M. Incidence of acute respiratory illnesses in athletes: a systematic review and meta-analysis by a subgroup of the IOC consensus on 'acute respiratory illness in the athlete'. Br J Sports Med 2022; 56:630-638. [PMID: 35260411 DOI: 10.1136/bjsports-2021-104737] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/16/2022] [Indexed: 12/25/2022]
Abstract
OBJECTIVE To determine the incidence of acute respiratory illness (ARill) in athletes and by method of diagnosis, anatomical classification, ages, levels of performance and seasons. DESIGN Systematic review and meta-analysis. DATA SOURCES Electronic databases: PubMed-Medline, EbscoHost and Web of Science. ELIGIBILITY CRITERIA Original research articles published between January 1990 and July 2020 in English reporting the incidence of ARill in athletes, at any level of performance (elite/non-elite), aged 15-65 years. RESULTS Across all 124 studies (n=1 28 360 athletes), the incidence of ARill, estimated by dividing the number of cases by the total number of athlete days, was 4.7 (95% CI 3.9 to 5.7) per 1000 athlete days. In studies reporting acute respiratory infections (ARinf; suspected and confirmed) the incidence was 4.9 (95% CI 4.0 to 6.0), which was similar in studies reporting undiagnosed ARill (3.7; 95% CI 2.1 to 6.7). Incidences of 5.9 (95% CI 4.8 to 7.2) and 2.8 (95% CI 1.8 to 4.5) were found for studies reporting upper ARinf and general ARinf (upper or lower), respectively. The incidence of ARinf was similar across the different methods to diagnose ARinf. A higher incidence of ARinf was found in non-elite (8.7; 95% CI 6.1 to 12.5) vs elite athletes (4.2; 95% CI 3.3 to 5.3). SUMMARY/CONCLUSIONS These findings suggest: (1) the incidence of ARill equates to approximately 4.7 per athlete per year; (2) the incidence of upper ARinf was significantly higher than general (upper/lower) ARinf; (3) elite athletes have a lower incidence of ARinf than non-elite athletes; (4) if pathogen identification is not available, physicians can confidently use validated questionnaires and checklists to screen athletes for suspected ARinf. For future studies, we recommend that a clear diagnosis of ARill is reported. PROSPERO REGISTRATION NUMBER CRD42020160472.
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Affiliation(s)
- Wayne Derman
- Institute of Sport and Exercise Medicine, Department of Sport Science, Faculty of Medicine and Health Sciences, Stellenbosch University, Stellenbosch, South Africa .,International Olympic Committee Research Centre, Pretoria, South Africa
| | - Marelise Badenhorst
- Institute of Sport and Exercise Medicine, Department of Sport Science, Faculty of Medicine and Health Sciences, Stellenbosch University, Stellenbosch, South Africa.,Sports Performance Research Institute New Zealand (SPRINZ), Auckland University of Technology, Auckland, New Zealand
| | - Maaike Maria Eken
- Institute of Sport and Exercise Medicine, Department of Sport Science, Faculty of Medicine and Health Sciences, Stellenbosch University, Stellenbosch, South Africa
| | - Josu Ezeiza-Gomez
- Institute of Sport and Exercise Medicine, Department of Sport Science, Faculty of Medicine and Health Sciences, Stellenbosch University, Stellenbosch, South Africa.,International Olympic Committee Research Centre, Pretoria, South Africa
| | - Jane Fitzpatrick
- Centre for Health and Exercise Sports Medicine, Faculty of Medicine Dentistry and Health Science, University of Melbourne, Parkville, Victoria, Australia
| | - Maree Gleeson
- School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, University of Newcastle, Callaghan, New South Wales, Australia
| | - Lovemore Kunorozva
- Institute of Sport and Exercise Medicine, Department of Sport Science, Faculty of Medicine and Health Sciences, Stellenbosch University, Stellenbosch, South Africa
| | - Katja Mjosund
- Paavo Nurmi Centre, Sport and Exercise Medicine Unit, University of Turku, Turku, Finland
| | - Margo Mountjoy
- Department of Family Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Nicola Sewry
- International Olympic Committee Research Centre, Pretoria, South Africa.,Sport, Exercise Medicine and Lifestyle Institute, University of Pretoria, Faculty of Health Sciences, Pretoria, South Africa
| | - Martin Schwellnus
- International Olympic Committee Research Centre, Pretoria, South Africa.,Sport, Exercise Medicine and Lifestyle Institute, University of Pretoria, Faculty of Health Sciences, Pretoria, South Africa
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Potential Long-Term Health Problems Associated with Ultra-Endurance Running: A Narrative Review. Sports Med 2021; 52:725-740. [PMID: 34542868 PMCID: PMC8450723 DOI: 10.1007/s40279-021-01561-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/03/2021] [Indexed: 12/14/2022]
Abstract
It is well established that physical activity reduces all-cause mortality and can prolong life. Ultra-endurance running (UER) is an extreme sport that is becoming increasingly popular, and comprises running races above marathon distance, exceeding 6 h, and/or running fixed distances on multiple days. Serious acute adverse events are rare, but there is mounting evidence that UER may lead to long-term health problems. The purpose of this review is to present the current state of knowledge regarding the potential long-term health problems derived from UER, specifically potential maladaptation in key organ systems, including cardiovascular, respiratory, musculoskeletal, renal, immunological, gastrointestinal, neurological, and integumentary systems. Special consideration is given to youth, masters, and female athletes, all of whom may be more susceptible to certain long-term health issues. We present directions for future research into the pathophysiological mechanisms that underpin athlete susceptibility to long-term issues. Although all body systems can be affected by UER, one of the clearest effects of endurance exercise is on the cardiovascular system, including right ventricular dysfunction and potential increased risk of arrhythmias and hypertension. There is also evidence that rare cases of acute renal injury in UER could lead to progressive renal scarring and chronic kidney disease. There are limited data specific to female athletes, who may be at greater risk of certain UER-related health issues due to interactions between energy availability and sex-hormone concentrations. Indeed, failure to consider sex differences in the design of female-specific UER training programs may have a negative impact on athlete longevity. It is hoped that this review will inform risk stratification and stimulate further research about UER and the implications for long-term health.
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Zaplatosch ME, Adams WM. The Effect of Acute Hypohydration on Indicators of Glycemic Regulation, Appetite, Metabolism and Stress: A Systematic Review and Meta-Analysis. Nutrients 2020; 12:nu12092526. [PMID: 32825404 PMCID: PMC7551868 DOI: 10.3390/nu12092526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 08/09/2020] [Accepted: 08/18/2020] [Indexed: 12/22/2022] Open
Abstract
Evidence synthesizing the effects of acute body water losses on various markers of glycemic regulation, appetite, metabolism, and stress is lacking. Thus, the purpose of this review was to summarize the response of various hormonal changes involved in these physiologic functions to dehydration. A comprehensive literature search for peer-reviewed research in the databases PubMed, Scopus, CINAHL, and SportDiscus was conducted. Studies were included if they contained samples of adults (>18 years) and experimentally induced dehydration as measured by acute body mass loss. Twenty-one articles were eligible for inclusion. Findings suggested cortisol is significantly elevated with hypohydration (standard mean difference [SMD] = 1.12, 95% CI [0.583, 1.67], p < 0.0001). Testosterone was significantly lower in studies where hypohydration was accompanied by caloric restriction (SMD= -1.04, 95% CI [-1.93, -0.14], p = 0.02), however, there were no changes in testosterone in studies examining hypohydration alone (SMD = -0.17, 95% CI [-0.51 0.16], p = 0.30). Insulin and ghrelin were unaffected by acute total body water losses. Acute hypohydration increases markers of catabolism but has a negligible effect on markers of glycemic regulation, appetite, anabolism and stress. Given the brevity of existing research, further research is needed to determine the impact of hydration on glucagon, leptin, peptide YY and the subsequent outcomes relevant to both health and performance.
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10
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Lopes RF, Minuzzi LG, Figueiredo AJ, Gonçalves C, Tessitore A, Capranica L, Teixeira AM, Rama L. Upper respiratory symptoms (URS) and salivary responses across a season in youth soccer players: A useful and non-invasive approach associated to URS susceptibility and occurrence in young athletes. PLoS One 2020; 15:e0236669. [PMID: 32750092 PMCID: PMC7402496 DOI: 10.1371/journal.pone.0236669] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 07/10/2020] [Indexed: 11/18/2022] Open
Abstract
This study examined the effect of a competitive season on salivary responses [cortisol (sC), testosterone (sT), Testosterone/Cortisol ratio (sT/C), Immunoglobulin A (sIgA), sIgA secretion rate (srIgA), alpha-amylase (sAA)] and upper respiratory symptoms (URS) occurrence in three teams of male soccer players (Under-15, Under-17 and Under-19 yrs.). Training and competition volumes, salivary biomarkers and URS were determined monthly. No differences were found for monthly training volume between teams. Incidence of URS was higher for the U15 (44.9% of the total cases). Higher sT and srIgA were observed for the U19, lower sC were found for the U17 and sAA showed higher values for the U15 throughout the season. In the U15, significant difference (p = .023) was found for sIgA concentration with higher concentration values in January compared to December (-42.7%; p = .008) and the sT showed seasonal variation (p < .001) with the highest value in January significantly different from October (-40.2%; p = .035), November (-38.5%; p = 0.022) and December (-51.6%; p = .008). The U19 presented an increase in sC in March compared to February (-66.1%, p = .018), sT/C were higher in February compared to March (-58.1%; p = .022) and sAA increased in March compared to September (-20.5%; p = .037). Negative correlations, controlled for age group, were found between URS occurrence and srIgA (r = -0.170, p = .001), sAA (r = -0.179, p = .001) and sT (r = -0.107, p = .047). Monitoring salivary biomarkers provides information on mucosal immunity with impact in URS occurrence. Coaches could manipulate training loads to attenuate the physical stressors imposed on athletes, especially at demanding and stressful periods.
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Affiliation(s)
- Renata Fiedler Lopes
- Research Center for Sport and Physical Activity, University of Coimbra, Faculty of Sport Sciences and Physical Education, Coimbra, Portugal
| | - Luciele Guerra Minuzzi
- Research Center for Sport and Physical Activity, University of Coimbra, Faculty of Sport Sciences and Physical Education, Coimbra, Portugal
- Exercise and Immunometabolism Research Group, Department of Physical Education, Faculty of Sciences and Technology, São Paulo State University, Presidente Prudente, São Paulo, Brazil
| | - António José Figueiredo
- Research Center for Sport and Physical Activity, University of Coimbra, Faculty of Sport Sciences and Physical Education, Coimbra, Portugal
| | - Carlos Gonçalves
- Research Center for Sport and Physical Activity, University of Coimbra, Faculty of Sport Sciences and Physical Education, Coimbra, Portugal
| | - Antonio Tessitore
- Department of Movement, Human and Health Sciences, University of Rome “Foro Italico”, Rome, Italy
| | - Laura Capranica
- Department of Movement, Human and Health Sciences, University of Rome “Foro Italico”, Rome, Italy
| | - Ana Maria Teixeira
- Research Center for Sport and Physical Activity, University of Coimbra, Faculty of Sport Sciences and Physical Education, Coimbra, Portugal
| | - Luis Rama
- Research Center for Sport and Physical Activity, University of Coimbra, Faculty of Sport Sciences and Physical Education, Coimbra, Portugal
- * E-mail:
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11
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Vaisberg M, Paixão V, Almeida EB, Santos JMB, Foster R, Rossi M, Pithon-Curi TC, Gorjão R, Momesso CM, Andrade MS, Araujo JR, Garcia MC, Cohen M, Perez EC, Santos-Dias A, Vieira RP, Bachi ALL. Daily Intake of Fermented Milk Containing Lactobacillus casei Shirota (Lcs) Modulates Systemic and Upper Airways Immune/Inflammatory Responses in Marathon Runners. Nutrients 2019; 11:nu11071678. [PMID: 31336570 PMCID: PMC6682935 DOI: 10.3390/nu11071678] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 07/14/2019] [Accepted: 07/19/2019] [Indexed: 12/23/2022] Open
Abstract
Background. Although Lactobacillus casei Shirota (LcS) can benefit the immune status, the effects of LcS in the immune/inflammatory responses of marathon runners has never been evaluated. Therefore, here we evaluated the effect of daily ingestion of fermented milk containing or not LcS in the systemic and upper airway immune/inflammatory responses before and after a marathon. Methods. Forty-two male marathon runners ingested a fermented milk containing 40 billion of LcS/day (LcS group, n = 20) or placebo (unfermented milk, n = 22) during 30 days pre-marathon. Immune/inflammatory parameters in nasal mucosa and serum, as well as concentrations of secretory IgA (SIgA) and antimicrobial peptides in saliva, were evaluated before and after fermented milk ingestion, immediately, 72 h, and 14 d post-marathon. Results. Higher proinflammatory cytokine levels in serum and nasal mucosa, and also lower salivary levels of SIgA and antimicrobial peptides, were found immediately post-marathon in the placebo group compared to other time points and to LcS group. In opposite, higher anti-inflammatory levels and reduced neutrophil infiltration on nasal mucosa were found in the LcS group compared to other time points and to the placebo group. Conclusion. For the first time, it is shown that LcS is able to modulate the systemic and airways immune responses post-marathon.
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Affiliation(s)
- Mauro Vaisberg
- Department of Otorhinolaryngology, Federal University of São Paulo (UNIFESP), São Paulo-SP 04039-032, Brazil
| | - Vitoria Paixão
- Department of Otorhinolaryngology, Federal University of São Paulo (UNIFESP), São Paulo-SP 04039-032, Brazil
| | - Ewin B Almeida
- Department of Otorhinolaryngology, Federal University of São Paulo (UNIFESP), São Paulo-SP 04039-032, Brazil
| | - Juliana M B Santos
- Department of Otorhinolaryngology, Federal University of São Paulo (UNIFESP), São Paulo-SP 04039-032, Brazil
| | - Roberta Foster
- Department of Otorhinolaryngology, Federal University of São Paulo (UNIFESP), São Paulo-SP 04039-032, Brazil
| | - Marcelo Rossi
- Department of Otorhinolaryngology, Federal University of São Paulo (UNIFESP), São Paulo-SP 04039-032, Brazil
| | - Tania C Pithon-Curi
- Institute of Physical Activity Science and Sport, Cruzeiro of Sul University, São Paulo-SP 01506-000, Brazil
| | - Renata Gorjão
- Institute of Physical Activity Science and Sport, Cruzeiro of Sul University, São Paulo-SP 01506-000, Brazil
| | - Cesar M Momesso
- Institute of Physical Activity Science and Sport, Cruzeiro of Sul University, São Paulo-SP 01506-000, Brazil
| | - Marília S Andrade
- Department of Physiology, Federal University of São Paulo (UNIFESP), São Paulo-SP 04023-062, Brazil
| | - José R Araujo
- Department of Morphology, Federal University of São Paulo (UNIFESP), São Paulo-SP 04023-900, Brazil
| | - Maurício C Garcia
- Department of Orthopaedics and Traumatology, Federal University of São Paulo (UNIFESP), São Paulo-SP 04024-002, Brazil
| | - Moises Cohen
- Department of Orthopaedics and Traumatology, Federal University of São Paulo (UNIFESP), São Paulo-SP 04024-002, Brazil
| | - Elisabeth C Perez
- Environmental and Experimental Pathology, Paulista University (UNIP), São Paulo-SP 04043-200, Brazil
| | - Alana Santos-Dias
- Children´s Institute, Faculty of Medicine, University of São Paulo, São Paulo-SP 05403-000, Brazil
| | - Rodolfo P Vieira
- Post-graduation Program in Bioengineering and in Biomedical Engineering, Universidade Brasil, São Paulo-SP 08230-030, Brazil
- Post-graduation Program in Sciences of Human Movement and Rehabilitation, Federal University of São Paulo (UNIFESP), Santos-SP 11060-001, Brazil
- Brazilian Institute of Teaching and Research in Pulmonary and Exercise Immunology (IBEPIPE), São José Dos Campos-SP 12245-520, Brazil
- School of Medicine, Anhembi Morumbi University, São José dos Campos-SP 12230-002, Brazil
| | - André L L Bachi
- Department of Otorhinolaryngology, Federal University of São Paulo (UNIFESP), São Paulo-SP 04039-032, Brazil.
- Brazilian Institute of Teaching and Research in Pulmonary and Exercise Immunology (IBEPIPE), São José Dos Campos-SP 12245-520, Brazil.
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12
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Hanstock HG, Edwards JP, Walsh NP. Tear Lactoferrin and Lysozyme as Clinically Relevant Biomarkers of Mucosal Immune Competence. Front Immunol 2019; 10:1178. [PMID: 31231369 PMCID: PMC6558391 DOI: 10.3389/fimmu.2019.01178] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 05/09/2019] [Indexed: 01/01/2023] Open
Abstract
Tears have attracted interest as a minimally-invasive biological fluid from which to assess biomarkers. Lactoferrin (Lf) and lysozyme (Lys) are abundant in the tear fluid and have antimicrobial properties. Since the eye is a portal for infection transmission, assessment of immune status at the ocular surface may be clinically relevant. Therefore, the aim of this series of studies was to investigate the tear fluid antimicrobial proteins (AMPs) Lf and Lys as biomarkers of mucosal immune status. To be considered biomarkers of interest, we would expect tear AMPs to respond to stressors known to perturb immunity but be robust to confounding variables, and to be lower in participants with heightened risk or incidence of illness. We investigated the relationship between tear AMPs and upper respiratory tract infection (URTI; study 1) as well as the response of tear AMPs to prolonged treadmill exercise (study 2) and dehydration (study 3). Study 1 was a prospective cohort study conducted during the common cold season whereas studies 2 and 3 used repeated-measures crossover designs. In study 1, tear Lys concentration (C) as well as tear AMP secretion rates (SRs) were lower in individuals who reported pathogen-confirmed URTI (n = 9) throughout the observation period than in healthy, pathogen-free controls (n = 17; Lys-C, P = 0.002, d = 0.85; Lys-SR, P < 0.001, d = 1.00; Lf-SR, P = 0.018, d = 0.66). Tear AMP secretion rates were also lower in contact lens wearers. In study 2, tear AMP SRs were 42-49% lower at 30 min-1 h post-exercise vs. pre-exercise (P < 0.001, d = 0.80-0.93). Finally, in study 3, tear AMPs were not influenced by dehydration, although tear AMP concentrations (but not secretion rates) displayed diurnal variation. We conclude that Lf and Lys have potential as biomarkers of mucosal immune competence; in particular, whether these markers are lower in infection-prone individuals warrants further investigation.
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Affiliation(s)
- Helen G Hanstock
- Extremes Research Group, School of Sport, Health and Exercise Sciences, College of Health and Human Sciences, Bangor University, Bangor, United Kingdom.,Swedish Winter Sports Research Centre, Department of Health Sciences, Mid Sweden University, Östersund, Sweden
| | - Jason P Edwards
- Extremes Research Group, School of Sport, Health and Exercise Sciences, College of Health and Human Sciences, Bangor University, Bangor, United Kingdom
| | - Neil P Walsh
- Extremes Research Group, School of Sport, Health and Exercise Sciences, College of Health and Human Sciences, Bangor University, Bangor, United Kingdom
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Salivary immunity and lower respiratory tract infections in non-elite marathon runners. PLoS One 2018; 13:e0206059. [PMID: 30462646 PMCID: PMC6248899 DOI: 10.1371/journal.pone.0206059] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 10/06/2018] [Indexed: 01/19/2023] Open
Abstract
Rationale Respiratory infections are common after strenuous exercise, when salivary immunity may be altered. We aim to investigate changes in salivary immunity after a marathon and its relationship with lower respiratory tract infections (LRTI) in healthy non-elite marathon runners. Methods Forty seven healthy marathon runners (28 males and 19 females) who completed the 42.195 km of the 2016 Barcelona marathon were studied. Saliva and blood samples were collected the day before the marathon and two days after the end of the race. Salivary IgA, antimicrobial proteins (lactoferrin, lysozyme) and chemokines (Groα, Groβ, MCP-1) were determined using ELISA kits in saliva supernatant. Blood biochemistry and haemogram were analyzed in all participants. The presence of LRTI was considered in those runners who reported infectious lower respiratory tract symptoms during a minimum of 3 consecutive days in the 2 weeks after the race. Results Eight participants (17%) presented a LRTI during the 2 weeks of follow-up. Higher lysozyme levels were detected after the race in runners with LRTI when compared with those without infection. A decrease in salivary lysozyme, Groα and Groβ levels after the race were observed in those runners who did not develop a LRTI when compared to basal levels. Salivary Groα levels correlated with basophil blood counts, and salivary lysozyme levels correlated with leukocyte blood counts. Conclusions LRTI are common after a marathon race in non-elite healthy runners. Changes in salivary antimicrobial proteins and chemokines are related to the presence of LRTI and correlate with systemic defense cells, which suggest an important role of salivary immunity in the development of LRTI in non-elite marathon runners.
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Lindsay A, Costello JT. Realising the Potential of Urine and Saliva as Diagnostic Tools in Sport and Exercise Medicine. Sports Med 2018; 47:11-31. [PMID: 27294353 DOI: 10.1007/s40279-016-0558-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Accurate monitoring of homeostatic perturbations following various psychophysiological stressors is essential in sports and exercise medicine. Various biomarkers are routinely used as monitoring tools in both clinical and elite sport settings. Blood collection and muscle biopsies, both invasive in nature, are considered the gold standard for the analysis of these biomarkers in exercise science. Exploring non-invasive methods of collecting and analysing biomarkers that are capable of providing accurate information regarding exercise-induced physiological and psychological stress is of obvious practical importance. This review describes the potential benefits, and the limitations, of using saliva and urine to ascertain biomarkers capable of identifying important stressors that are routinely encountered before, during, or after intense or unaccustomed exercise, competition, over-training, and inappropriate recovery. In particular, we focus on urinary and saliva biomarkers that have previously been used to monitor muscle damage, inflammation, cardiovascular stress, oxidative stress, hydration status, and brain distress. Evidence is provided from a range of empirical studies suggesting that urine and saliva are both capable of identifying various stressors. Although additional research regarding the efficacy of using urine and/or saliva to indicate the severity of exercise-induced psychophysiological stress is required, it is likely that these non-invasive biomarkers will represent "the future" in sports and exercise medicine.
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Affiliation(s)
- Angus Lindsay
- Program in Physical Therapy and Rehabilitation Sciences, School of Medicine, University of Minnesota, 420 Delaware Street SE, Minneapolis, MN, 55455, USA.
| | - Joseph T Costello
- Extreme Environments Laboratory, Department of Sport and Exercise Science, University of Portsmouth, Spinnaker Building, Cambridge Road, Portsmouth, PO1 2ER, UK
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15
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Knechtle B, Nikolaidis PT. Physiology and Pathophysiology in Ultra-Marathon Running. Front Physiol 2018; 9:634. [PMID: 29910741 PMCID: PMC5992463 DOI: 10.3389/fphys.2018.00634] [Citation(s) in RCA: 152] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 05/11/2018] [Indexed: 12/31/2022] Open
Abstract
In this overview, we summarize the findings of the literature with regards to physiology and pathophysiology of ultra-marathon running. The number of ultra-marathon races and the number of official finishers considerably increased in the last decades especially due to the increased number of female and age-group runners. A typical ultra-marathoner is male, married, well-educated, and ~45 years old. Female ultra-marathoners account for ~20% of the total number of finishers. Ultra-marathoners are older and have a larger weekly training volume, but run more slowly during training compared to marathoners. Previous experience (e.g., number of finishes in ultra-marathon races and personal best marathon time) is the most important predictor variable for a successful ultra-marathon performance followed by specific anthropometric (e.g., low body mass index, BMI, and low body fat) and training (e.g., high volume and running speed during training) characteristics. Women are slower than men, but the sex difference in performance decreased in recent years to ~10–20% depending upon the length of the ultra-marathon. The fastest ultra-marathon race times are generally achieved at the age of 35–45 years or older for both women and men, and the age of peak performance increases with increasing race distance or duration. An ultra-marathon leads to an energy deficit resulting in a reduction of both body fat and skeletal muscle mass. An ultra-marathon in combination with other risk factors, such as extreme weather conditions (either heat or cold) or the country where the race is held, can lead to exercise-associated hyponatremia. An ultra-marathon can also lead to changes in biomarkers indicating a pathological process in specific organs or organ systems such as skeletal muscles, heart, liver, kidney, immune and endocrine system. These changes are usually temporary, depending on intensity and duration of the performance, and usually normalize after the race. In longer ultra-marathons, ~50–60% of the participants experience musculoskeletal problems. The most common injuries in ultra-marathoners involve the lower limb, such as the ankle and the knee. An ultra-marathon can lead to an increase in creatine-kinase to values of 100,000–200,000 U/l depending upon the fitness level of the athlete and the length of the race. Furthermore, an ultra-marathon can lead to changes in the heart as shown by changes in cardiac biomarkers, electro- and echocardiography. Ultra-marathoners often suffer from digestive problems and gastrointestinal bleeding after an ultra-marathon is not uncommon. Liver enzymes can also considerably increase during an ultra-marathon. An ultra-marathon often leads to a temporary reduction in renal function. Ultra-marathoners often suffer from upper respiratory infections after an ultra-marathon. Considering the increased number of participants in ultra-marathons, the findings of the present review would have practical applications for a large number of sports scientists and sports medicine practitioners working in this field.
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Affiliation(s)
- Beat Knechtle
- Institute of Primary Care, University of Zurich, Zurich, Switzerland
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16
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Abstract
Zusammenfassung. Wir stellen die wichtigsten Erkenntnisse zu Organschädigungen durch einen Ultramarathon zusammen. Nach einem Ultramarathon können kardiale Biomarker wie CK, CK-MB, kardiales Troponin I (cTnI) und N-terminales pro-Brain Natriuretic Peptide (NT-pro BNP) erhöht sein. Bis 80 % und mehr der Finisher klagen über Verdauungsprobleme, die einer der Hauptgründe sind, einen Ultramarathon nicht zu finishen. Bis zu 90 % der Läufer, die einen Ultramarathon aufgeben, klagen über Übelkeit. Nach einem Ultramarathon steigen die Leberwerte oft an, schwerwiegende Konsequenzen bleiben meist aus. Risikofaktoren für eine Einschränkung der Nierenfunktion sind eine ausgeprägte Muskelschädigung mit Rhabdomyolyse, Dehydratation, Hypotonie, Hyperurikämie, Hyponatriämie, geringe Wettkampferfahrung sowie die Einnahme von NSARs. Ultraläufer leiden nach einem Ultramarathon oft an Infekten der oberen Atemwege.
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Affiliation(s)
- Beat Knechtle
- 1 Medbase St. Gallen
- 2 Institut für Hausarztmedizin, Universität Zürich
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Effects of prolonged running in the heat and cool environments on selected physiological parameters and salivary lysozyme responses. J Exerc Sci Fit 2018. [PMID: 29541134 PMCID: PMC5812877 DOI: 10.1016/j.jesf.2017.08.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Introduction Lysozyme is one of the salivary antimicrobial proteins which act as the “first line of defence” at the mucosal surface. The effects of prolonged exercise in the hot and cool environments among recreational athletes on salivary lysozyme responses are very limited in the literature, especially in the Asian countries. Objective To determine the effects of prolonged running in the hot and cool environments on selected physiological parameters and salivary lysozyme responses among recreational athletes. Methods Randomised and cross-over study design. Thirteen male recreational athletes (age: 20.9 ± 1.3 years old) from Universiti Sains Malaysia participated in this study. They performed two separate running trials; 90 min running at 60% of their respective maximum oxygen uptake (V˙O2max) One running trial was performed in the hot (31ºC) while the other was in the cool (18ºC) environment and this sequence was randomised. Each running trial was started with a 5 min warm-up at 50% of participant's respective V˙O2max Recovery period between these two trials was one week. In the both trials, saliva samples, blood samples, heart rate, ratings of perceived exertion, skin and tympanic temperatures, oxygen consumption, nude body weight, room temperature, and relative humidity were collected. Results Participants' skin temperature, tympanic temperature, body weight changes, heart rate, ratings of perceived exertion, and plasma volume changes were significantly higher (p < 0.05) in the hot trial compared to the cool trial. Saliva flow rate was not significantly (p = 0.949) different between the hot (0.32 ± 0.08 ml/min) and cool (0.27 ± 0.05 ml/min) trials. However, in each trial, it significantly decreased (p < 0.05) at post-exercise as compared to pre-exercise but it returned to baseline value at 1 h post-exercise. In addition, there were no significant differences between and within hot and cool trials in salivary lysozyme concentration (p = 0.925; 4.79 ± 1.37 and 4.44 ± 1.11 μg/ml respectively) and secretion rate (p = 0.843; 1.67 ± 1.1 and 1.17 ± 1.0 μg/min respectively). Conclusion This study found similar lysozyme responses between both hot and cool trials. Thus, room/ambient temperature did not affect lysozyme responses among recreational athletes. Nevertheless, the selected physiological parameters were significantly affected by room temperature.
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18
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Simultaneous measurement of salivary cortisol and alpha-amylase: Application and recommendations. Neurosci Biobehav Rev 2017; 83:657-677. [DOI: 10.1016/j.neubiorev.2017.08.015] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 07/16/2017] [Accepted: 08/21/2017] [Indexed: 01/20/2023]
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Born DP, Zinner C, Sperlich B. The Mucosal Immune Function Is Not Compromised during a Period of High-Intensity Interval Training. Is It Time to Reconsider an Old Assumption? Front Physiol 2017; 8:485. [PMID: 28744226 PMCID: PMC5504186 DOI: 10.3389/fphys.2017.00485] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 06/23/2017] [Indexed: 11/13/2022] Open
Abstract
Purpose: The aim of the study was to evaluate the mucosal immune function and circadian variation of salivary cortisol, Immunoglobin-A (sIgA) secretion rate and mood during a period of high-intensity interval training (HIIT) compared to long-slow distance training (LSD). Methods: Recreational male runners (n = 28) completed nine sessions of either HIIT or LSD within 3 weeks. The HIIT involved 4 × 4 min of running at 90-95% of maximum heart rate interspersed with 3 min of active recovery while the LSD comprised of continuous running at 70-75% of maximum heart rate for 60-80 min. The psycho-immunological stress-response was investigated with a full daily profile of salivary cortisol and immunoglobin-A (sIgA) secretion rate along with the mood state on a baseline day, the first and last day of training and at follow-up 4 days after the last day of training. Before and after the training period, each athlete's running performance and peak oxygen uptake (V·O2peak) was determined with an incremental exercise test. Results: The HIIT resulted in a longer time-to-exhaustion (P = 0.02) and increased V·O2peak compared to LSD (P = 0.01). The circadian variation of sIgA secretion rate showed highest values in the morning immediately after waking up followed by a decrease throughout the day in both groups (P < 0.05). With HIIT, the wake-up response of sIgA secretion rate was higher on the last day of training (P < 0.01) as well as the area under the curve (AUCG) higher on the first and last day of training and follow-up compared to the LSD (P = 0.01). Also the AUCG for the sIgA secretion rate correlated with the increase in V·O2peak and running performance. The AUCG for cortisol remained unaffected on the first and last day of training but increased on the follow-up day with both, HIIT and LSD (P < 0.01). Conclusion: The increased sIgA secretion rate with the HIIT indicates no compromised mucosal immune function compared to LSD and shows the functional adaptation of the mucosal immune system in response to the increased stress and training load of nine sessions of HIIT.
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Affiliation(s)
- Dennis-Peter Born
- Integrative and Experimental Exercise Science, Institute for Sport Sciences, University of WuerzburgWuerzburg, Germany
| | - Christoph Zinner
- Integrative and Experimental Exercise Science, Institute for Sport Sciences, University of WuerzburgWuerzburg, Germany
| | - Billy Sperlich
- Integrative and Experimental Exercise Science, Institute for Sport Sciences, University of WuerzburgWuerzburg, Germany
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Gill SK, Price M, Costa RJS. Measurement of saliva flow rate in healthy young humans: influence of collection time and mouthrinse water temperature. Eur J Oral Sci 2016; 124:447-453. [PMID: 27671982 DOI: 10.1111/eos.12294] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/11/2016] [Indexed: 01/20/2023]
Abstract
The aim of the current study was to determine if unstimulated saliva flow (measured in μl min-1 ) is affected by different durations of sample collection and by temperatures of mouthrinse water used before sample collection. In randomized order, participants provided 10 samples of unstimulated saliva at time points ranging from 1 to 6 min after rinsing with different temperatures of water (10, 20, and 30°C). Data were analysed by one-way anova with post-hoc tests. Test-retest reliability was assessed using Bland-Altman plots and correlation coefficients. A larger volume of saliva was obtained over a longer collection time. No significant difference in saliva flow rate was observed between collection times [mean: 364 (95% CI: 332-397) μl min-1 ]. Although rinsing with different temperatures of mouthrinse water resulted in no significant difference in saliva flow rates as a result of the mouthrinse water temperatures, 60% of the participants had a higher saliva flow rate after rinsing with mouthrinse water at a temperature of 10°C compared with mouthrinse water at 20 and 30°C, suggesting large individual variation (range: 24-420 μl min-1 ). These findings provide justification for using saliva collection times of 1-6 min during sampling of unstimulated saliva. The large individual variations in saliva flow rate in response to different mouthrinse water temperatures suggest that standardization, control, and reporting of mouthrinse water temperature is warranted.
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Affiliation(s)
- Samantha K Gill
- Education and Professional Development, British Dietetic Association, Birmingham, UK
| | - Mike Price
- Applied Biology and Exercise Sciences Research Centre, School of Life Sciences, Coventry University, Coventry, UK
| | - Ricardo J S Costa
- Department of Nutrition & Dietetics, Monash University, Notting Hill, Vic., Australia.
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Strahler J, Fuchs R, Nater UM, Klaperski S. Impact of physical fitness on salivary stress markers in sedentary to low-active young to middle-aged men. Psychoneuroendocrinology 2016; 68:14-9. [PMID: 26939084 DOI: 10.1016/j.psyneuen.2016.02.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 02/08/2016] [Accepted: 02/22/2016] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Salivary cortisol (sCort) and alpha-amylase (sAA) are popular measurement tools for investigating hypothalamic-pituitary-adrenal and autonomic functioning, respectively. Despite their widespread use, only little is known about whether lifestyle factors such as regular exercise and physical fitness impact these two salivary stress markers. The lack of an objectively assessed fitness status is a major drawback of nearly all previous studies in this area. Our main objective was therefore to examine the impact of fitness status on sCort and sAA responses to a validated stressor. METHOD Sedentary to low-active men (N=115, 45.7±10.1 years, 26.7±3.4kg/m(2)) were exposed to the Trier Social Stress Test for Groups and provided saliva samples before and repeatedly after the stressor. An ergometer lactate exercise test provided information on physical fitness, that is, power achieved at the individual anaerobic threshold relative to body weight. From age-specific percentiles, a 2- (n=65 low fitness, n=50 high fitness) and a 3-group (n=37 low fitness, n=49 moderate fitness, n=29 high fitness) solution were calculated to elucidate the impact of different fitness levels. RESULTS Prior to stress testing, sCort and sAA levels were similar in all groups. While both markers increased significantly due to stress exposure, fitness effects appeared rather small. When applying the 3-group solution, we observed attenuated sCort slopes in high- and moderate-fit men. Although sAA response slopes were pronounced in high-fit men, they failed to reach statistical significance. Mean stress reactivity (area under the curve with respect to ground, baseline, and response maximum) did not differ between groups and no association with fitness level was found. DISCUSSION Our findings suggest only a weak effect of objectively assessed physical fitness on biological stress responses with attenuated hypothalamic-pituitary-adrenal but (non-significantly) higher autonomic responses in fitter men. Physical fitness is a factor that should not be neglected in future studies employing salivary stress markers, especially in studies interested in acute stress responses.
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Affiliation(s)
- Jana Strahler
- Clinical Biopsychology, Dept. of Psychology, University of Marburg, Germany.
| | - Reinhard Fuchs
- Institute of Sport and Sport Science, University of Freiburg, Freiburg, Germany
| | - Urs M Nater
- Clinical Biopsychology, Dept. of Psychology, University of Marburg, Germany
| | - Sandra Klaperski
- Sport and Exercise Psychology, Dept. of Life Sciences, University of Roehampton, London, United Kingdom
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