Pack, S.H., Park, M.K., Kang, H.S. The effect of yoga training on the automatic cardiac nerve activity. Exercise Science. 19(3): 331-338, 2010. The purpose of the study is comparing changes of the autonomic nervous system by measuring the pre and post autonomic nerve activity of between trained and non-trained yoga. By using Nerve Express 2.2(HEART RHYTHM INSTRUMENTS, INC. USA), we operated Ortho Test to measure an autonomic nervous system. The results in brief are, autonomic nerve changes by yoga training were no significant difference but was little decrease at supine condition of SN of YG and were significant decrease at upright condition of YG. At supine and upright condition of PNS were increase significantly after complete yoga training. No significant differences were found between pre and post yoga training in SN and PSN of CG at supine and upright condition. The significant differences between two groups at supine condition of SN were not found but the significant difference at upright condition of SN, supine and upright condition of PNS were found statistically. In conclusion, an automatic nerve activity was affected positively by yoga training because of decrease in sympathetic nerve tension and increase in parasympathetic nerve tension. Therefore, yoga training should be the appropriate exercise to improve cardiac function.
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