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Polizzi J, Tosto-Mancuso J, Tabacof L, Wood J, Putrino D. Resonant breathing improves self-reported symptoms and wellbeing in people with Long COVID. FRONTIERS IN REHABILITATION SCIENCES 2024; 5:1411344. [PMID: 39071772 PMCID: PMC11272651 DOI: 10.3389/fresc.2024.1411344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Accepted: 06/25/2024] [Indexed: 07/30/2024]
Abstract
Introduction Long COVID involves debilitating symptoms, many of which mirror those observed with dysautonomia, and care must be taken with rehabilitation for autonomic dysfunction to avoid post-exertional malaise/post-exertional symptom exacerbation. Resonant breathing (breathing slowly at a defined rate of breaths per minute) requires less exertion and can potentially improve autonomic function. The objective of this work was to report on the impact of a resonant breathing program on self-reported symptoms and wellbeing in people with Long COVID. Methods A retrospective analysis of de-identified data was completed in a convenience sample of people with Long COVID, who participated in the Meo Health (formerly known as Stasis HP) resonant breathing program. Participants completed baseline and follow up surveys. Results Data were available for 99 participants. Most measures of symptoms and wellbeing improved at follow up, with the largest differences per participant seen in sense of wellness (47.3%, p < 0.0001), ability to focus (57.5%, p < 0.0001), ability to breathe (47.5%, p < 0.0001), ability to control stress (61.8%, p < 0.0001) and sleep quality (34.9%, p = 0.0002). Most (92%) participants reported improvement at follow up on the Patient Global Impression of Change Scale. Conclusion Self-reported symptoms and wellbeing improved in people with Long COVID completing resonant breathing. Resonant breathing can be considered as an option within the broader treatment plan of people with Long COVID.
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Affiliation(s)
| | | | | | | | - David Putrino
- Cohen Center for Recovery from Complex Chronic Illnesses, Icahn School of Medicine at Mount Sinai, New York, NY, United States
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Kwa EK, Cheong SK, Ong LK, Lee PF. Development of audio-guided deep breathing and auditory Go/No-Go task on evaluating its impact on the wellness of young adults: a pilot study. BIOMED ENG-BIOMED TE 2024; 69:141-150. [PMID: 37856824 DOI: 10.1515/bmt-2023-0410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 10/08/2023] [Indexed: 10/21/2023]
Abstract
OBJECTIVES Numerous studies indicate that deep breathing (DB) enhances wellbeing. Multiple deep breathing methods exist, but few employ audio to reach similar results. This study developed audio-guided DB and evaluated its immediate impacts on healthy population via self-created auditory Go/No-Go task, tidal volume changes, and psychological measures. METHODS Audio-guided DB with natural sounds to guide the DB was developed. Meanwhile, audio-based Go/No-Go paradigm with Arduino was built to measure the attention level. Thirty-two healthy young adults (n=32) were recruited. Psychological questionnaires (Rosenberg's Self-Esteem Scale (RSES), Cognitive and Affective Mindfulness Scale-Revised (CAMS-R), Perceived Stress Scale (PSS)), objective measurements with tidal volume and attention level with auditory Go/No-Go task were conducted before and after 5 min of DB. RESULTS Results showed a significant increment in tidal volume and task reaction time from baseline (p=0.003 and p=0.033, respectively). Significant correlations were acquired between (1) task accuracy with commission error (r=-0.905), (2) CAMS-R with task accuracy (r=-0.425), commission error (r=0.53), omission error (r=0.395) and PSS (r=-0.477), and (3) RSES with task reaction time (r=-0.47), task accuracy (r=-0.362), PSS (r=-0.552) and CAMS-R (r=0.591). CONCLUSIONS This pilot study suggests a link between it and young adults' wellbeing and proposes auditory Go/No-Go task for assessing attention across various groups while maintaining physical and mental wellness.
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Affiliation(s)
- Eng Keat Kwa
- Lee Kong Chian Faculty of Engineering & Science, University Tunku Abdul Rahman, Kajang, Selangor, Malaysia
| | - Soon Keng Cheong
- M. Kandiah Faculty of Medicine and Health Sciences, University Tunku Abdul Rahman, Kajang, Selangor, Malaysia
| | - Lin Kooi Ong
- School of Health and Medical Sciences, University of Southern Queensland, Toowoomba, QLD, Australia
- School of Pharmacy, Monash University Malaysia, Subang Jaya, Selangor, Malaysia
- School of Biomedical Sciences and Pharmacy, The University of Newcastle, Callaghan, NSW, Australia
| | - Poh Foong Lee
- Lee Kong Chian Faculty of Engineering & Science, University Tunku Abdul Rahman, Kajang, Selangor, Malaysia
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Hasuo H, Mori K, Matsuoka H, Sakuma H, Ishikawa H. An Estimation Formula for Resonance Frequency Using Sex and Height for Healthy Individuals and Patients with Incurable Cancers. Appl Psychophysiol Biofeedback 2024; 49:125-132. [PMID: 37702816 PMCID: PMC10869367 DOI: 10.1007/s10484-023-09602-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/25/2023] [Indexed: 09/14/2023]
Abstract
Resonance frequency breathing is a technique that involves breathing that maximizes heart rate variability. It is specific to individuals and is determined through a procedure taking approximately 30 min, using a procedure that is often best carried out at specialized medical institutions. This is a physical and time-consuming burden because of hospital visits and measurements, particularly for patients with cancer. Therefore it would be beneficial if a procedure can be found to determine resonance frequency from the patient's physical characteristics, without the need for special assessment procedures. This exploratory cross-sectional study examined the correlation between individual characteristics and resonance frequency in healthy volunteers. Multiple regression analysis was performed with the measured resonance frequency as the target variable and individual characteristic parameters as explanatory variables. The study aims to build an estimation formula for resonance frequency with some of these parameters and assess its validity. In addition, the validity of the formula's applicability to patients with incurable cancers is assessed. A total of 122 healthy volunteers and 32 patients with incurable cancers were recruited as participants. The median resonance frequency of 154 participants was six breaths per min. Sex and height were selected as explanatory variables associated with the measured resonance frequency in the volunteers. The estimation formula for resonance frequency using individual characteristics was 17.90-0.07 × height for men and 15.88-0.06 × height for women. Adjusted R-squared values were 0.55 for men and 0.47 for women. When the measured resonance frequency in patients with incurable cancers was six breaths per minute or less, the resonance frequency estimated by this formula was slightly larger than the measured ones. Information on individual characteristics, such as sex and height, which can be easily obtained, was useful to construct an estimation formula for resonance frequency.
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Affiliation(s)
- Hideaki Hasuo
- Department of Psychosomatic Medicine, Kansai Medical University, Shinmachi 2-5-1, Hirakata, Osaka, 573-1090, Japan.
| | - Keita Mori
- Clinical Research Support Center, Shizuoka Cancer Center, Shizuoka, Japan
| | - Hiromichi Matsuoka
- Department of Psycho-Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Hiroko Sakuma
- Department of Psychosomatic Medicine, Kansai Medical University, Shinmachi 2-5-1, Hirakata, Osaka, 573-1090, Japan
| | - Hideki Ishikawa
- Department of Molecular-Targeting Prevention, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Ooi JH, Lim R, Seng H, Tan MP, Goh CH, Lovell NH, Argha A, Beh HC, Md Sari NA, Lim E. Non-invasive parameters of autonomic function using beat-to-beat cardiovascular variations and arterial stiffness in hypertensive individuals: a systematic review. Biomed Eng Online 2024; 23:23. [PMID: 38378540 PMCID: PMC10880234 DOI: 10.1186/s12938-024-01202-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 01/04/2024] [Indexed: 02/22/2024] Open
Abstract
PURPOSE Non-invasive, beat-to-beat variations in physiological indices provide an opportunity for more accessible assessment of autonomic dysfunction. The potential association between the changes in these parameters and arterial stiffness in hypertension remains poorly understood. This systematic review aims to investigate the association between non-invasive indicators of autonomic function based on beat-to-beat cardiovascular signals with arterial stiffness in individuals with hypertension. METHODS Four electronic databases were searched from inception to June 2022. Studies that investigated non-invasive parameters of arterial stiffness and autonomic function using beat-to-beat cardiovascular signals over a period of > 5min were included. Study quality was assessed using the STROBE criteria. Two authors screened the titles, abstracts, and full texts independently. RESULTS Nineteen studies met the inclusion criteria. A comprehensive overview of experimental design for assessing autonomic function in terms of baroreflex sensitivity and beat-to-beat cardiovascular variabilities, as well as arterial stiffness, was presented. Alterations in non-invasive indicators of autonomic function, which included baroreflex sensitivity, beat-to-beat cardiovascular variabilities and hemodynamic changes in response to autonomic challenges, as well as arterial stiffness, were identified in individuals with hypertension. A mixed result was found in terms of the association between non-invasive quantitative autonomic indices and arterial stiffness in hypertensive individuals. Nine out of 12 studies which quantified baroreflex sensitivity revealed a significant association with arterial stiffness parameters. Three studies estimated beat-to-beat heart rate variability and only one study reported a significant relationship with arterial stiffness indices. Three out of five studies which studied beat-to-beat blood pressure variability showed a significant association with arterial structural changes. One study revealed that hemodynamic changes in response to autonomic challenges were significantly correlated with arterial stiffness parameters. CONCLUSIONS The current review demonstrated alteration in autonomic function, which encompasses both the sympathetic and parasympathetic modulation of sinus node function and vasomotor tone (derived from beat-to-beat cardiovascular signals) in hypertension, and a significant association between some of these parameters with arterial stiffness. By employing non-invasive measurements to monitor changes in autonomic function and arterial remodeling in individuals with hypertension, we would be able to enhance our ability to identify individuals at high risk of cardiovascular disease. Understanding the intricate relationships among these cardiovascular variability measures and arterial stiffness could contribute toward better individualized treatment for hypertension in the future. SYSTEMATIC REVIEW REGISTRATION PROSPERO ID: CRD42022336703. Date of registration: 12/06/2022.
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Affiliation(s)
- Jia Hui Ooi
- Department of Biomedical Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
- Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, NSW, Australia
| | - Renly Lim
- Quality Use of Medicines and Pharmacy Research Centre, UniSA Clinical and Health Sciences, University of South Australia, Adelaide, 5000, Australia
| | - Hansun Seng
- South West Sydney (SWS), School of Clinical Medicine, UNSW Sydney, Sydney, NSW, Australia
- Woolcock Vietnam Research Group, Woolcock Institute of Medical Research, Sydney, Australia
| | - Maw Pin Tan
- Ageing and Age‑Associated Disorders Research Group, Department of Medicine, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Choon Hian Goh
- Department of Mechatronics and BioMedical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Bandar Sungai Long, Kajang, 43200, Selangor, Malaysia
| | - Nigel H Lovell
- Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, NSW, Australia
- Tyree Institute of Health Engineering (IHealthE), UNSW Sydney, Sydney, NSW, Australia
| | - Ahmadreza Argha
- Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, NSW, Australia
- Tyree Institute of Health Engineering (IHealthE), UNSW Sydney, Sydney, NSW, Australia
| | - Hooi Chin Beh
- Department of Primary Care Medicine, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Nor Ashikin Md Sari
- Division of Cardiology, Department of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Einly Lim
- Department of Biomedical Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
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Birk JL, Cumella R, Lopez-Veneros D, Agarwal S, Kronish IM. Feasibility of a remote heart rate variability biofeedback intervention for reducing anxiety in cardiac arrest survivors: A pilot trial. Contemp Clin Trials Commun 2024; 37:101251. [PMID: 38312473 PMCID: PMC10837694 DOI: 10.1016/j.conctc.2023.101251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 04/12/2023] [Accepted: 12/22/2023] [Indexed: 02/06/2024] Open
Abstract
Background Heart rate variability biofeedback (HRVB) is a promising non-pharmacologic approach for reducing anxiety. This intervention's feasibility needs testing in psychologically distressed cardiac patients for whom heart-related anxiety is a core concern. To enhance scalability and convenience, remote delivery of HRVB also needs to be assessed. Accordingly, we evaluated the feasibility of remote HRVB in survivors of cardiac arrest (CA) with elevated CA-related psychological distress. Methods The intervention was comprised of daily sessions of diaphragmatic paced breathing and real-time monitoring of cardiac activity guided by a smartphone app and heart rate monitor. This single-arm feasibility trial assessed the percentage of eligible contacted patients who consented and engaged in the study and the self-reported acceptability, feasibility, appropriateness, and usability of the intervention. Exploratory analyses assessed pre-to-post changes in trait anxiety, negative affect, cardiac-related interoceptive fear, and resting-state HRV. Results Of 12 eligible CA survivors contacted, 10 enrolled. All 10 patients completed the virtual study visits and the majority (>50 %) of prescribed training sessions. Ninety percent reported good scores for intervention acceptability and feasibility, and 80 % reported good scores for its appropriateness and usability for reducing fear. Trait anxiety decreased significantly pre-to-post intervention. There were no changes in negative affect, interoceptive fear, or resting state HRV. Conclusion A remotely delivered HRVB intervention was acceptable, feasible, and useable for cardiac patients with CA-related psychological distress. A phase 2 randomized controlled trial evaluating the efficacy of HRVB on cardiac patients' psychological distress, health behaviors, and autonomic dysfunction may be warranted.
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Affiliation(s)
- Jeffrey L. Birk
- Center for Behavioral Cardiovascular Health, Department of Medicine, Columbia University Irving Medical Center, 622 West 168th Street, New York, 10032, United States
| | - Robin Cumella
- Center for Behavioral Cardiovascular Health, Department of Medicine, Columbia University Irving Medical Center, 622 West 168th Street, New York, 10032, United States
| | - David Lopez-Veneros
- Center for Behavioral Cardiovascular Health, Department of Medicine, Columbia University Irving Medical Center, 622 West 168th Street, New York, 10032, United States
| | - Sachin Agarwal
- Department of Neurology, Division of Critical Care & Hospitalist Neurology, Columbia University Irving Medical Center, 177 Fort Washington Avenue, Milstein Hospital, 8GS-300, New York, 10032, United States
| | - Ian M. Kronish
- Center for Behavioral Cardiovascular Health, Department of Medicine, Columbia University Irving Medical Center, 622 West 168th Street, New York, 10032, United States
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Vondrasek JD, Riemann BL, Grosicki GJ, Flatt AA. Validity and Efficacy of the Elite HRV Smartphone Application during Slow-Paced Breathing. SENSORS (BASEL, SWITZERLAND) 2023; 23:9496. [PMID: 38067869 PMCID: PMC10708620 DOI: 10.3390/s23239496] [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: 07/27/2023] [Revised: 10/25/2023] [Accepted: 11/23/2023] [Indexed: 12/18/2023]
Abstract
Slow-paced breathing is a clinical intervention used to increase heart rate variability (HRV). The practice is made more accessible via cost-free smartphone applications like Elite HRV. We investigated whether Elite HRV can accurately measure and augment HRV via its slow-paced breathing feature. Twenty young adults completed one counterbalanced cross-over protocol involving 10 min each of supine spontaneous (SPONT) and paced (PACED; 6 breaths·min-1) breathing while RR intervals were simultaneously recorded via a Polar H10 paired with Elite HRV and reference electrocardiography (ECG). Individual differences in HRV between devices were predominately skewed, reflecting a tendency for Elite HRV to underestimate ECG-derived values. Skewness was typically driven by a limited number of outliers as median bias values were ≤1.3 ms and relative agreement was ≥very large for time-domain parameters. Despite no significant bias and ≥large relative agreement for frequency-domain parameters, limits of agreement (LOAs) were excessively wide and tended to be wider during PACED for all HRV parameters. PACED significantly increased low-frequency power (LF) for Elite HRV and ECG, and between-condition differences showed very large relative agreement. Elite HRV-guided slow-paced breathing effectively increased LF values, but it demonstrated greater precision during SPONT and in computing time-domain HRV.
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Affiliation(s)
- Joseph D. Vondrasek
- Biodynamics and Human Performance Center, Department of Health Sciences and Kinesiology, Georgia Southern University (Armstrong), 11935 Abercorn St., Savannah, GA 31419, USA; (B.L.R.); (G.J.G.); (A.A.F.)
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Weibel RP, Kerr JI, Naegelin M, Ferrario A, Schinazi VR, La Marca R, Hoelscher C, Nater UM, von Wangenheim F. Virtual reality-supported biofeedback for stress management: Beneficial effects on heart rate variability and user experience. COMPUTERS IN HUMAN BEHAVIOR 2022. [DOI: 10.1016/j.chb.2022.107607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Laborde S, Allen MS, Borges U, Dosseville F, Hosang TJ, Iskra M, Mosley E, Salvotti C, Spolverato L, Zammit N, Javelle F. Effects of voluntary slow breathing on heart rate and heart rate variability: A systematic review and a meta-analysis. Neurosci Biobehav Rev 2022; 138:104711. [PMID: 35623448 DOI: 10.1016/j.neubiorev.2022.104711] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 05/20/2022] [Accepted: 05/21/2022] [Indexed: 10/18/2022]
Abstract
Voluntary slow breathing (VSB) is used as a prevention technique to support physical and mental health, given it is suggested to influence the parasympathetic nervous system (PNS). However, to date, no comprehensive quantitative review exists to support or refute this claim. We address this through a systematic review and meta-analysis of the effects of VSB on heart rate variability (HRV). Specifically, we focus on HRV parameters indexing PNS activity regulating cardiac functioning, referred to as vagally-mediated (vm)HRV: (1) during the breathing session (i.e., DURING), (2) immediately after one training session (i.e., IM-AFTER1), as well as (3) after a multi-session intervention (i.e., AFTER-INT). From the 1842 selected abstracts, 223 studies were suitable for inclusion (172 DURING, 16 IM-AFTER1, and 49 AFTER-INT). Results indicate increases in vmHRV with VSB, DURING, IM-AFTER1, and AFTER-INT. Given the involvement of the PNS in a large range of health-related outcomes and conditions, VSB exercises could be advised as a low-tech and low-cost technique to use in prevention and adjunct treatment purposes, with few adverse effects expected.
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Affiliation(s)
- S Laborde
- Department of Performance Psychology, Institute of Psychology, German Sport University Cologne, Germany; EA 4260, UFR STAPS, Normandie Université Caen, France.
| | - M S Allen
- Department of Psychology, University of Wollongong, Wollongong, Australia
| | - U Borges
- Department of Performance Psychology, Institute of Psychology, German Sport University Cologne, Germany; Department of Social & Health Psychology, Institute of Psychology, German Sport University Cologne, Germany
| | - F Dosseville
- INSERM, UMR-S 1075 COMETE, Normandie Université Caen, France
| | - T J Hosang
- Experimental Psychology Unit, Helmut Schmidt University, Hamburg, Germany
| | - M Iskra
- Department of Performance Psychology, Institute of Psychology, German Sport University Cologne, Germany
| | - E Mosley
- Solent University, Southampton, UK
| | - C Salvotti
- Department of Performance Psychology, Institute of Psychology, German Sport University Cologne, Germany
| | - L Spolverato
- Department of Performance Psychology, Institute of Psychology, German Sport University Cologne, Germany
| | - N Zammit
- Department of Performance Psychology, Institute of Psychology, German Sport University Cologne, Germany
| | - F Javelle
- Department for Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sport University Cologne,Germany
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Evaluation of Heart Rate Variability and Application of Heart Rate Variability Biofeedback: Toward Further Research on Slow-Paced Abdominal Breathing in Zen Meditation. Appl Psychophysiol Biofeedback 2022; 47:345-356. [PMID: 35579767 DOI: 10.1007/s10484-022-09546-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/27/2022] [Indexed: 11/02/2022]
Abstract
This review summarizes my own involvement in heart rate variability (HRV) and HRV biofeedback studies, as a tribute to the late Dr. Evgeny Vaschillo. I first review psychophysiological studies on behavioral stress and relaxation performed in my laboratory using an assessment of cardiac parasympathetic activity. Although magnitude of high-frequency (HF) component of HRV corresponding respiratory sinus arrhythmia (RSA) is widely used as an index of cardiac parasympathetic function, a respiratory confound during stress or relaxation may have interfered with the proper assessment of the HF HRV. An enhanced method under frequency-controlled respiration at 0.25 Hz provided a reliable assessment of cardiac parasympathetic activity. I then review findings from HRV biofeedback research in my laboratory. Based on the hypothesis that RSA measured as an HF component of HRV represents cardiorespiratory resting function, it was demonstrated that HRV biofeedback before sleep enhanced the magnitude of HF HRV during sleep, a cardiorespiratory resting function. Moreover, by focusing on the spectral peak of the low-frequency (LF) component of HRV, paced breathing at the LF-peak frequency was shown to increase baroreflex sensitivity. Finally, I describe the potential of slow-paced abdominal breathing (i.e., Tanden breathing) performed in Zen meditation. The concept of Tanden breathing as described in a regimen from early modern Japan is introduced, and recent research findings on slow-paced abdominal breathing are summarized. Future research directions of slow-paced abdominal breathing are also discussed.
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Bolin LP, Saul AD, Bethune Scroggs LL, Horne C. A pilot study investigating the relationship between heart rate variability and blood pressure in young adults at risk for cardiovascular disease. Clin Hypertens 2022; 28:2. [PMID: 35031077 PMCID: PMC8760819 DOI: 10.1186/s40885-021-00185-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 11/07/2021] [Indexed: 12/30/2022] Open
Abstract
Background Cardiovascular disease is one of the leading causes of death globally with hypertension being a primary cause of premature death from this disease process. Individuals with a family history of cardiovascular disease and hypertension are at a greater risk for developing the same sequela. Autonomic cardiac control is important in the level of cardiac function. One intervention that is effective in improving cardiovascular function is heart rate variability biofeedback training. The purpose of our study was to determine the effectiveness of heart rate biofeedback training on HRV and blood pressure in individuals with a family history of cardiovascular disease. Methods Thirty-four participants (76.5% female, 22.7 ± 4.3 years) completed a baseline assessment and training using an established short-term HRV protocol followed by two weeks of at-home paced breathing employing a smartphone application. The participants were then reassessed in a biofeedback clinic. Results The participants physiological measures showed a significant increase in means between pre and post intervention of SDNN (t (32) = 2.177, p =.037) and TP, (t (32) = 2.327 p = .026). Correlation noted a medium effect on diastolic blood pressure and high frequency heart rate variability, F, r = .41, n =33, p < .05. A multiple regression with all predictor variables in the model found no significance with diastolic and systolic blood pressure. Conclusions The findings from this pilot study demonstrated that a two-week paced breathing intervention may assist in reducing heart rate and diastolic blood pressure while improving heart rate variability. Supplementary Information The online version contains supplementary material available at 10.1186/s40885-021-00185-z.
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Affiliation(s)
- Linda P Bolin
- College of Nursing, East Carolina University, Greenville, United States.
| | - Amelia D Saul
- Department of Addiction and Rehabilitation Studies, East Carolina University, Greenville, United States
| | - Lauren L Bethune Scroggs
- Department of Addiction and Rehabilitation Studies, East Carolina University, Greenville, United States
| | - Carolyn Horne
- College of Nursing, East Carolina University, Greenville, United States
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Park SM, Jung HY. Respiratory sinus arrhythmia biofeedback alters heart rate variability and default mode network connectivity in major depressive disorder: A preliminary study. Int J Psychophysiol 2020; 158:225-237. [DOI: 10.1016/j.ijpsycho.2020.10.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 10/06/2020] [Accepted: 10/20/2020] [Indexed: 12/12/2022]
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Shaffer F, Meehan ZM. A Practical Guide to Resonance Frequency Assessment for Heart Rate Variability Biofeedback. Front Neurosci 2020; 14:570400. [PMID: 33117119 PMCID: PMC7578229 DOI: 10.3389/fnins.2020.570400] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 09/10/2020] [Indexed: 12/13/2022] Open
Abstract
Heart rate variability (HRV) represents fluctuations in the time intervals between successive heartbeats, which are termed interbeat intervals. HRV is an emergent property of complex cardiac-brain interactions and non-linear autonomic nervous system (ANS) processes. A healthy heart is not a metronome because it exhibits complex non-linear oscillations characterized by mathematical chaos. HRV biofeedback displays both heart rate and frequently, respiration, to individuals who can then adjust their physiology to improve affective, cognitive, and cardiovascular functioning. The central premise of the HRV biofeedback resonance frequency model is that the adult cardiorespiratory system has a fixed resonance frequency. Stimulation at rates near the resonance frequency produces large-amplitude blood pressure oscillations that can increase baroreflex sensitivity over time. The authors explain the rationale for the resonance frequency model and provide detailed instructions on how to monitor and assess the resonance frequency. They caution that patterns of physiological change must be compared across several breathing rates to evaluate candidate resonance frequencies. They describe how to fine-tune the resonance frequency following an initial assessment. Furthermore, the authors critically assess the minimum epochs required to measure key HRV indices, resonance frequency test-retest reliability, and whether rhythmic skeletal muscle tension can replace slow paced breathing in resonance frequency assessment.
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Affiliation(s)
- Fred Shaffer
- Center for Applied Psychophysiology, Truman State University, Kirksville, MO, United States
| | - Zachary M. Meehan
- Department of Psychological and Brain Sciences, University of Delaware, Newark, DE, United States
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