Vinay A V, Venkatesh D, Ambarish V
Department of Physiology, PES Institute of Medical Science and Research, Kuppam, Andhra Pradesh, India.
Department of Physiology, M. S. Ramaiah Medical College, Bengaluru, Karnataka, India.
Int J Yoga. 2016 Jan-Jun;9(1):62-6. doi: 10.4103/0973-6131.171714.
Yoga is a science that facilitates homeostasis, an ancient way of life intended to improve the quality of life of an individual. Practice of yoga is proposed to alter the autonomic nervous system and affect the cardiovascular functioning. This study was intended to assess the influence of short-term practice of yoga for a month on heart rate variability (HRV).
Totally, 40 healthy male volunteers in the age group of 30-60 years willing to practice yoga for a month were included in the study. HRV was assessed using HRV device (RMS Vagus, India). Preinterventional assessment of HRV was done in these subjects. Practice of yoga that included a set of physical postures (asanas), breathing techniques (pranayama), and meditation (dhyana) were performed for an hour daily for 1 month under the guidance of a certified yoga instructor. Postinterventional assessment of HRV was done. The values were expressed in median and their interquartile range, and statistical analysis was done to compare the changes using Wilcoxon Signed Rank Test.
Thirty-two of 40 subjects recruited for yoga practice completed the study protocol. Analysis of HRV revealed that in time domain parameters, SDNN increased from 33.60 (31.41-44.82) to 42.11 (34.43-57.51), RMSSD increased from 22.00 (16.00-33.80) to 25.6 (17.0-34.8), and PNN50 increased from 2.45 (0.80-15.38) to 7.35 (1.40-18.57) after intervention. In the frequency domain parameters, the low-frequency (LF) power spectrum reduced from 39.30 (25.1-46.25) to 30.40 (22.75-40.62) and LF/high-frequency ratio was reduced from 2.62 (1.91-4.07) to 2.28 (1.4-3.07) after 1 month practice of yoga. P < 0.05 was considered statistically significant.
Autonomic balance tilts toward parasympathetic predominance after 1 month practice of yoga.
瑜伽是一门促进体内平衡的科学，是一种旨在提高个人生活质量的古老生活方式。有人提出，练习瑜伽可改变自主神经系统并影响心血管功能。本研究旨在评估为期一个月的短期瑜伽练习对心率变异性（HRV）的影响。
本研究共纳入40名年龄在30至60岁之间、愿意练习瑜伽一个月的健康男性志愿者。使用HRV设备（印度RMS Vagus）评估HRV。对这些受试者进行干预前的HRV评估。在一名认证瑜伽教练的指导下，每天进行一小时、为期1个月的瑜伽练习，包括一系列体式（asanas）、呼吸技巧（pranayama）和冥想（dhyana）。干预后进行HRV评估。数值以中位数及其四分位间距表示，并使用Wilcoxon符号秩检验进行统计分析以比较变化。
招募参加瑜伽练习的40名受试者中有32名完成了研究方案。HRV分析显示，在时域参数方面，干预后标准偏差（SDNN）从33.60（31.41 - 44.82）增加到42.11（34.43 - 57.51），连续差值均方根（RMSSD）从22.00（16.00 - 33.80）增加到25.6（17.0 - 34.8），50%相邻RR间期差值大于50 ms的心搏数百分比（PNN50）从2.45（0.80 - 15.38）增加到7.35（1.40 - 18.57）。在频域参数方面，低频（LF）功率谱在瑜伽练习一个月后从39.30（25.1 - 46.25）降至30.40（22.75 - 40.62），低频/高频比值从2.62（1.91 - 4.07）降至2.28（1.4 - 3.07）。P < 0.05被认为具有统计学意义。
瑜伽练习1个月后，自主神经平衡倾向于副交感神经占优势。
