期刊
PLOS ONE
卷 9, 期 12, 页码 -出版社
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0114731
关键词
-
资金
- National Center for Complementary and Alternative Medicine (NCCAM) at the National Institutes of Health (NIH) [R21 AT005501-01A1]
- Harvard Clinical and Translational Science Center, from the National Center for Research Resourses (NCRR) [UL1 RR025758]
- National Institute on Aging (NIA) [R37-AG25037]
- NIH-National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) [5R21-DK-084463-02]
- National Institutes of Health (NIH)-National Institute on Aging (NIA) [1R01-AG-0287601-A2]
- Harvard Catalyst \ The Harvard Clinical and Translational Science Center (National Center for Research Resources)
- Harvard Catalyst \ The Harvard Clinical and Translational Science Center (National Center for Advancing Translational Sciences)
- Harvard Catalyst \ The Harvard Clinical and Translational Science Center (National Institutes of Health Award) [8UL1TR000170-05]
- Harvard Catalyst \ The Harvard Clinical and Translational Science Center (Harvard University)
- Irving and Edyth S. Usen and Family Chair in Geriatric Medicine at Hebrew SeniorLife
Background: Diminished control of standing balance, traditionally indicated by greater postural sway magnitude and speed, is associated with falls in older adults. Tai Chi (TC) is a multisystem intervention that reduces fall risk, yet its impact on sway measures vary considerably. We hypothesized that TC improves the integrated function of multiple control systems influencing balance, quantifiable by the multi-scale complexity'' of postural sway fluctuations. Objectives: To evaluate both traditional and complexity-based measures of sway to characterize the short- and potential long-term effects of TC training on postural control and the relationships between sway measures and physical function in healthy older adults. Methods: A cross-sectional comparison of standing postural sway in healthy TC-nalve and TC-expert (24.5 +/- 12 yrs experience) adults. TC-nalve participants then completed a 6-month, two-arm, wait-list randomized clinical trial of TC training.Postural sway was assessed before and after the training during standing on a force-plate with eyes-open (EO) and eyes-closed (EC). Anterior-posterior (AP) and medio-lateral (ML) sway speed, magnitude, and complexity (quantified by multiscale entropy) were calculated. Single- legged standing time and Timed-Up-and- Go tests characterized physical function. Results: At baseline, compared to TC-nalve adults (n=60, age 64.5 +/- 7.5 yrs), TC-experts (n=27, age 62.8 +/- 7.5 yrs) exhibited greater complexity of sway in the AP EC (P=0.023), ML EO (P, 0.001), and ML EC (P, 0.001) conditions. Traditional measures of sway speed and magnitude were not significantly lower among TC-experts. Intention-to-treat analyses indicated no significant effects of short-term TC training; however, increases in AP EC and ML EC complexity amongst those randomized to TC were positively correlated with practice hours (P=0.044, P=0.018). Long- and short-term TC training were positively associated with physical function. Conclusion: Multiscale entropy offers a complementary approach to traditional COP measures for characterizing sway during quiet standing, and may be more sensitive to the effects of TC in healthy adults.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据