Dynamic stability differences in fall-prone and healthy adults
Dynamic stability differences in fall-prone and healthy adults
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DOI：
10.1016/j.jelekin.2007.06.008
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发表时间：
2008-04-01
影响因子：
2.5
通讯作者：
Lockhart, Thurmon E.
中科院分区：
文献类型：
--
作者：
Granata, Kevin P.;Lockhart, Thurmon E.
尽管大多数福尔斯跌倒发生在动态活动（如行走）期间，但典型的稳定性评估表征了站立平衡的性能。本研究的目的是确定动态稳定性之间的差异跌倒倾向的老年人，健康的年龄匹配的成年人，和年轻的成年人。三维视频运动分析运动学数据被记录为35个连续的步骤，而受试者走在跑步机上以三种速度。根据这些数据，我们估计了每次脚撞击时从质心到压力中心的矢量。步行的动态稳定性计算的方法庞加莱分析这些向量。结果表明，跌倒倾向组表现出较差的动态稳定性比健康的老年人和年轻的成年人组。稳定性不受步行速度的影响，表明步行速度的组间差异不能完全解释稳定性的差异。这项试点研究支持未来的调查需要使用更大的人口样本，研究跌倒倾向的个人使用非线性动态分析的运动运动学。(C)2007年由Elsevier Ltd.出版
Typical stability assessments characterize performance in standing balance despite the fact that most falls occur during dynamic activities such as walking. The objective of this study was to identify dynamic stability differences between fall-prone elderly individuals, healthy age-matched adults, and young adults. Three-dimensional video-motion analysis kinematic data were recorded for 35 contiguous steps while subjects walked on a treadmill at three speeds. From this data, we estimated the vector from the center-of-mass to the center of pressure at each foot-strike. Dynamic stability of walking was computed by methods of Poincare analyses of these vectors. Results revealed that the fall-prone group demonstrated poorer dynamic stability than the healthy elderly and young adult groups. Stability was not influenced by walking velocity, indicating that group differences in walking speed could not fully explain the differences in stability. This pilot study supports the need for future investigations using larger population samples to study fall-prone individuals using nonlinear dynamic analyses of movement kinematics. (C) 2007 Published by Elsevier Ltd.