Yoga may have a profound effect in improved heart rate regardless of patients precondition, some institution studies suggested
Yoga, the ancient technique practice for harmonized external and internal body well beings, through breath control, meditation, bodily movement, and gesture..... has been well known for people in the Western world and some parts in Asia due to health benefits reported by various respectable institutes' research and supported by health advocates.
According to the study to examine the effects of an 8-week yoga program on heart rate variability and mood in generally healthy women (n=52) randomly assigned to a yoga(comprised a 60-minute session twice a week. Each session consisted of breathing exercises, yoga pose practice, and supine meditation/relaxation) group or a control group, in compared to control, yoga group expressed insignificant change in heart rate.
But after taking into account of other confounders, researchers insisted that long term yoga lessons may have a positive effect in heart rate in women with higher levels of stress and trait anxiety.
Other researchers in the concern of the effect of yoga in reduced high blood pressure but not heart rate launched an investigation of 26 male volunteers assigned either in yoga with assessment taken at 3-time points: Pre (5 minutes), during (15 minutes; for ANYB or BAW) and Post (5 minutes)
1. Yoga group expressed a significant decrease (repeated measures ANOVA) in systolic BP and respiration rate
2. Breath rate was found to be the difference in all 3 intervals, measured by awareness (BAW) assay.
Further assessment, Dr. Telles S, the led author suggested that the vagal activity involved in heart rate regulation increased during and after ANYB, may contribute to the decrease in BP and changes in the HRV.
More importantly, in randomized clinical trials (RCTs) in compared yoga against any type of control intervention in healthy individuals or patients with any medical condition, through searching the literature published online database wit 14 studies satisfied the criteria selected, researchers found that
1. Yoga intervention expressed in Ten RCTs showed favorable effects of yoga on various domains of HRV,
2. The meta-analysis (MA) of two trials did not show the favourable effects of yoga compared to usual care.
After taking into account other influences, researchers suggested that there was no convincing evidence for the effectiveness of yoga in modulating HRV in patients or healthy subjects.
The finding, although showed contradictory results of yoga in improved heart rate, some researchers insisted that long term intervention may prove the differences
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Kyle J. Norton, Master of Nutrition
Health article writer and researcher; Over 10.000 articles and research papers have been written and published on line, including world wide health, ezine articles, article base, healthblogs, selfgrowth, best before it's news, the karate GB daily, etc.,.
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Some articles have been used as references in medical research, such as international journal Pharma and Bio science, ISSN 0975-6299.
(1) Effects of Yoga on Heart Rate Variability and Mood in Women: A Randomized Controlled Trial by Chu IH1, Lin YJ1, Wu WL1, Chang YK2, Lin IM3.(PubMed)
(2) Blood pressure and heart rate variability during yoga-based alternate nostril breathing practice and breath awareness by Telles S1, Sharma SK1, Balkrishna A1.(PubMed)
(3) Yoga for Heart Rate Variability: A Systematic Review and Meta-analysis of Randomized Clinical Trials.by Posadzki P1, Kuzdzal A, Lee MS, Ernst E.(PubMed)
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