scholarly journals Acute Effects of Heart Rate Variability Biofeedback on H-reflex and Maximal Voluntary Isometric Strength

2020 ◽  
Author(s):  
Jeffrey Pagaduan ◽  
Sam SX Wu ◽  
James W. Fell ◽  
Yung-Sheng Chen
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Soleus Muscle ◽  
Repeated Measures ◽  
H Reflex ◽  
Visually Guided ◽  
Plantar Flexors ◽  
Maximal Voluntary Isometric Contraction ◽  
Heart Rate Variability Biofeedback ◽  
Significant Difference

Abstract Background Heart rate variability biofeedback (HRV BFB) is a visually-guided paced breathing scheme that stimulates resonance in the cardiovascular system. Up to date, the influence of HRV BFB on neuromuscular function remains unknown. The purpose of this study was to investigate the effects of a single-session HRV BFB on Hoffman reflex (H-reflex) of the soleus muscle and maximal voluntary isometric contraction (MVC) of plantar flexors. Methods Eleven male healthy participants (height: 173.6 ± 7.5 cm; weight: 74.5 ± 17.3 kg; age: 24.6 ± 4.8 yrs) volunteered to undergo a randomized-crossover intervention involving a 10-minute HRV BFB and normal breathing (CON), separated by 48-hours. Pre and post indices for H-reflex, and post-only MVC in HRV BFB were evaluated using two-way repeated measures ANOVA and independent T-test respectively. Results No significant differences in H-reflex markers between HRV BFB and CON were found. Both groups posted non-significant difference in MVC. Conclusion An acute HRV BFB was not sufficient in eliciting significant changes in motoneuron excitability of the soleus muscle and maximal muscle strength of plantar flexors.

Heart Rate Variability Biofeedback in Grandmothers Raising Grandchildren: Effects on Stress, Emotions, and Cognitions

Biofeedback ◽  
2013 ◽  
Vol 41 (3) ◽  
pp. 144-149 ◽  
Author(s):  
Jaclene A. Zauszniewski ◽  
Tsay-Yi Au ◽  
Carol M. Musil
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Perceived Stress ◽  
Repeated Measures ◽  
Negative Emotions ◽  
Pilot Trial ◽  
Heart Rate Variability Biofeedback ◽  
Grandmothers Raising Grandchildren ◽  
Depressive Cognitions ◽  
Reducing Stress

Over one million American grandmothers raise grandchildren, and many experience stress that may be alleviated by biofeedback. This pilot trial of 20 grandmothers used a pretest-posttest design with repeated measures to test the effects of heart rate variability (HRV) biofeedback on perceived stress, negative emotions, and depressive cognitions. Significant decreases in stress, negative emotions, and depressive cognitions were found. Biofeedback is thus potentially effective for reducing stress and depressive thoughts and feelings in grandmothers raising grandchildren, and the intervention warrants further testing.

scholarly journals Non-invasive assessment of short and ultra-short heart rate variability during different physical and physiological tests

Kinesiology ◽  
2021 ◽  
Vol 53 (1) ◽  
pp. 122-130
Author(s):  
Tuncay Alparslan ◽  
Ramiz Arabaci ◽  
Recep Gorgulu
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Test Performance ◽  
Repeated Measures ◽  
Short Term ◽  
High Performing ◽  
Non Invasive ◽  
Significant Difference ◽  
Physiological Tests ◽  
Data Collection Procedure

The main aim of the present study was to determine the short- and ultra-short-term heart rate variability (HRV) during different physical and physiological tests and to compare HRV to different performance levels. The latter aim was to compare participants’ short- and ultra-short-term heart rate variability before-during-post-tests. Our hypothesis was that there would be a significant difference between test performance and HRV parameters, and the high performing group would have significantly higher HRV parameters than the low performing group. Fifty-three healthy men (Mage=26.9±4 years, Mheight=177.9±5.7 cm; Mweight =77.8±8.7 kg) were recruited in the current study. We completed the data collection procedure for each participant in four consecutive days. On day-1, anthropometric measurements were conducted and then participants performed isokinetic tests. On day-2, participants performed anaerobic tests; on day-3 equilibrium tests, and on day-4 aerobic capacity tests. The HRV records of all participants were obtained before, during and after all these tests. Based on the participants’ performance, they were divided into two groups: participants in G1 had lower performance and those in G2 higher performance. A two-way repeated measures ANOVA yielded significant differences in HRV values obtained in the four different tests. There was a significant difference between fitness test performance and the variation of short- and ultra-short-term HRV parameters. Also, significant differences in HRV values before, during, and after the testing were observed.

scholarly journals Effect of Acute Heart Rate Variability Biofeedback on H-reflex Modulation: A Pilot Study

2021 ◽  
Vol 76 (1) ◽  
pp. 83-88
Author(s):  
Jeffrey Cayaban Pagaduan ◽  
Sam Shi Xuan Wu ◽  
James William Fell ◽  
Yung-Sheng Chen
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Motor Neurons ◽  
H Reflex ◽  
Reflex Modulation ◽  
Single Session ◽  
Heart Rate Variability Biofeedback ◽  
Normal Breathing ◽  
Afferent Activation ◽  
Hoffman Reflex

Abstract Heart rate variability biofeedback (HRV BFB) is paced breathing scheme that stimulates resonance in the cardiovascular system. This study aimed to investigate the effect of a single-session HRV BFB on Hoffman reflex (H-reflex) of the soleus muscle. Twelve healthy males (height: 173.7 ± 7.18 cm; weight: 72.7 ± 17.7 kg; age: 24.0 ± 5.02 yrs) completed a randomized-crossover intervention involving a 10-minute HRV BFB and normal breathing (CON) separated by 48 hours. Results revealed significantly lower 1a afferent activation after HRV BFB. Similarly, the HRV BFB also demonstrated lower proportion of activated motor neurons from 1a afferents. In conclusion, an acute HRV BFB influenced the reduction in motoneuron excitability at resting condition.

scholarly journals Impact of shorter MDR tuberculosis regimen drugs on heart rate variability in MDR tuberculosis patients at tertiary care hospital

2021 ◽  
Vol 10 (7) ◽  
pp. 813
Author(s):  
Disha S. Patel ◽  
Chetankumar R. Acharya
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Nervous System ◽  
Repeated Measures ◽  
Tertiary Care ◽  
Low Frequency ◽  
Care Hospital ◽  
Active Pulmonary Tuberculosis ◽  
Significant Difference ◽  
Mdr Tb

Background: Tuberculosis is major cause of death in India. Analysis of heart rate variability is one of the most popular methods of autonomic nervous system evaluation. Shorter MDR-TB regimen drugs affect both central nervous system as well as peripheral nervous system. Existing research suggests that active pulmonary tuberculosis causes ANS dysfunction. So, by HRV measurement impact of shorter MDR-TB regimen drugs on autonomic dysfunction can be correlated. Aim of the current investigation was to evaluate effect of shorter MDR-TB regimen drugs on cardiac autonomic regulation in MDR-TB patients with respect to heart rate variability as a parameter.Methods: Fifty newly diagnosed MDR-TB patients of either gender on shorter MDR- TB regimen were enrolled in this study after taking consent. After 20 minutes rest, ECG was taken by “physiopac digital polygraph” software for 5 minutes. Two follow-up HRV assessments were done on 2nd month and 4th or 6th month of treatment. HRV was calculated by root mean square deviation of successive differences between adjacent RR intervals (RMSSD) and low frequency and high frequency ratio.Results: Repeated measures ANOVA showed no statistically significant difference in HRV parameters between baseline, 2 months and 6 months groups. So, sympathetic and parasympathetic modulation in terms of HRV remains unchanged during treatment of MDR-TB with shorter MDR-TB regimen drugs.Conclusions: Shorter MDR-TB regimen drugs don’t have any significant impact on HRV in MDR- TB patients, No correlation was observed between HRV and heart rate in MDR-TB patients.

A preliminary systematic review and meta-analysis on the effects of heart rate variability biofeedback on heart rate variability and respiration of athletes

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jeffrey Cayaban Pagaduan ◽  
Yung-Sheng Chen ◽  
James William Fell ◽  
Sam Shi Xuan Wu
Keyword(s):  
Systematic Review ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Web Of Science ◽  
Meta Analysis ◽  
Academic Research ◽  
Experimental Studies ◽  
Quantitative Review ◽  
Heart Rate Variability Biofeedback ◽  
Randomized Control

Abstract To date, there is no quantitative review examining the influence of heart rate variability biofeedback (HRV BFB) on the athlete population. Such an undertaking may provide valuable information on the autonomic and respiration responses of athletes when performing HRV BFB. Thus, purpose of this preliminary systematic review and meta-analysis on the effects of HRV BFB on HRV and respiration of athletes. Searches of Springerlink, SportDiscus, Web of Science, PROQUEST Academic Research Library, Google Scholar, and ScienceDirect were conducted for studies that met the following criteria: (1) experimental studies involving athletes that underwent randomized control trial; (2) availability of HRV BFB as a treatment compared with a control (CON)/placebo (PLA); (3) any pre and post HRV variable and/or breathing frequency as dependent variable/s; and, (4) peer-reviewed articles written in English. Four out of 660 studies involving 115 athletes (25 females and 90 males) ages 16–30 years old were assessed in this review. Preliminary findings suggest the promising ability of HRV BFB to improve respiratory mechanics in athlete population. More work is needed to determine the autonomic modulatory effect of HRV BFB in athletes.

HRV Biofeedback and Addiction: Rehabbing Body, Mind and Spirit

Biofeedback ◽  
2021 ◽  
Vol 49 (1) ◽  
pp. 10-17
Author(s):  
Amy Hudson
Keyword(s):  
Heart Rate ◽  
Chronic Pain ◽  
Heart Rate Variability ◽  
The Body ◽  
Heart Rate Variability Biofeedback ◽  
The Mind

Addiction is a devastating disease of the body, the mind, and even the personality. Recent research shows that heart rate variability biofeedback can help the alcoholic/addict recover in three crucial ways, namely (1) treating the associated comorbidities (depression, anxiety, chronic pain), (2) treating the physiology around craving, and (3) returning to a loving and nurturing relationship with one's own body instead of an abusive and exploitive one.

The Promise of Heart Rate Variability Biofeedback: Evidence-Based Applications

Biofeedback ◽  
2013 ◽  
Vol 41 (3) ◽  
pp. 110-120 ◽  
Author(s):  
Richard Gevirtz
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Empirical Evidence ◽  
Point Of View ◽  
Evidence Based ◽  
Multiple Sources ◽  
Heart Rate Variability Biofeedback

Heart rate variability biofeedback has enjoyed increased popularity in recent years. In this review, empirical evidence from multiple sources is presented from the point of view of possible mechanisms of effect. While more research is clearly needed, the data thus far are certainly promising.

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