Tai Chi Chih acutely decreases sympathetic nervous system activity in older adults

被引:75
作者
Motivala, Sarosh J.
Sollers, John
Thayer, Julian
Irwin, Michael R.
机构
[1] Univ Calif Los Angeles, Semel Inst Neurosci & Human Behav, Cousins Ctr Psychoneuroimmunol, Los Angeles, CA 90095 USA
[2] NIA, Emot & Quantitat Psychophysiol Sect, Gerontol Res Ctr, Baltimore, MD 21224 USA
来源
JOURNALS OF GERONTOLOGY SERIES A-BIOLOGICAL SCIENCES AND MEDICAL SCIENCES | 2006年 / 61卷 / 11期
关键词
D O I
10.1093/gerona/61.11.1177
中图分类号
R592 [老年病学]; C [社会科学总论];
学科分类号
03 ; 0303 ; 100203 ;
摘要
Background. Aging is associated with increases of sympathetic nervous system activation implicated in the onset of hypertension and cardiovascular disease. The purpose of this study was to examine whether the practice of Tai Chi Chih (TCC), a movement-based relaxation practice, would acutely promote decreases of sympathetic activity in elderly persons. Method. The sample included two groups of older men and women (age >= 60 years): TCC practitioners (n = 19) and TCC-naive participants (n = 13). Participants were recruited after completing a 25-week randomized trial of TCC or health education. TCC practitioners performed TCC for 20 minutes, and TCC-naive participants passively rested. Preejection period, blood pressure, and heart rate were measured before and after the task. A subsample (n = 8) returned for a second evaluation and performed videotape-guided stretching for 20 minutes to evaluate the effects of slow-moving physical activity on sympathetic activity. Results. Results showed that TCC performance significantly. decreased sympathetic activity as indexed by preejection period (p =.01). In contrast, there was no change in preejection period following passive rest or slow-moving physical activity. Neither blood pressure nor heart rate changed after TCC performance. Discussion. This study is the first to our knowledge to assess the acute effects of TCC practice on sympathetic activity in older adults. TCC performance led to acute decreases in sympathetic activity, which could not be explained by physical activity alone. Further study is needed to determine whether the acute salutary effects of TCC on autonomic functioning are sustained with ongoing practice in older adults.
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收藏
页码:1177 / 1180
页数:4
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