Tai Chi Chih acutely decreases sympathetic nervous system activity in older adults
Tai Chi Chih acutely decreases sympathetic nervous system activity in older adults
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DOI：
10.1093/gerona/61.11.1177
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发表时间：
2006-11-01
影响因子：
5.1
通讯作者：
Irwin, Michael R.
中科院分区：
文献类型：
--
作者：
Motivala, Sarosh J.;Sollers, John;Irwin, Michael R.
背景资料。衰老与交感神经系统激活增加有关，交感神经系统激活与高血压和心血管疾病的发病有关。本研究旨在探讨太极拳(TCC)这一以运动为基础的放松练习是否能显著促进老年人交感神经活动的减少。样本包括两组年龄较大的男性和女性(年龄=60岁)：TCC从业者(n=19)和TCC幼稚参与者(n=13)。参与者是在完成为期25周的TCC或健康教育随机试验后被招募的。TCC实践者进行了20分钟的TCC，TCC天真的参与者被动休息。在任务前后测量射血前期、血压和心率。一组样本(n=8)返回进行第二次评估，并在录像带引导下进行20分钟的伸展，以评估缓慢运动的体力活动对交感神经活动的影响。结果表明，TCC的性能显著。以射血前时间为指标的交感神经活性降低(p=0.01)。相反，在被动休息或缓慢运动的体力活动后，射血前期没有变化。TCC手术后血压和心率均无变化。据我们所知，这项研究是第一次评估TCC练习对老年人交感神经活动的急性影响。TCC的表现导致交感神经活性的急剧下降，这不能仅用体力活动来解释。需要进一步的研究来确定TCC对自主神经功能的急性有益影响是否在老年人中持续存在。
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.