Athletic skill level is reflected in body sway: A test case for accelometry in combination with stochastic dynamics
Athletic skill level is reflected in body sway: A test case for accelometry in combination with stochastic dynamics
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DOI：
10.1016/j.gaitpost.2008.12.006
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发表时间：
2009-06-01
期刊：
影响因子：
2.4
通讯作者：
Beek, Peter J.
中科院分区：
文献类型：
--
作者：
Lamoth, Claudine J. C.;van Lummel, Rob C.;Beek, Peter J.
最近的姿势控制研究表明，在安静的站立身体摇摆的变化可能提供有价值的信息来表征由于年龄，病理，技能和任务的姿势控制的变化。本研究的目的是确定-作为可能的临床应用的基础工作-在躯干处用三轴加速度计测量的身体摇摆是否可以区分运动技能水平不同的三个健康年轻人群。研究对象为普通本科生、体育系学生和体育系体操专修学生，每组22人。数据记录在串联的立场与眼睛打开或关闭，而站在泡沫。对加速度时间序列进行前后和内外向分析。姿势控制的差异在可变性、光谱特性和随机动力学测量方面进行了量化，即，规律性（样本熵，长程相关性）和局部稳定性（最大李雅普诺夫指数）。结果很明显。闭上眼睛站着和站在泡沫上会增加变异性。与睁着眼睛站立相比，闭着眼睛站立导致不太规则的摇摆模式，但具有更大的局部稳定性，而站在泡沫上则具有相反的效果。随着体操技巧的提高，加速度时间序列的变化更少，规则性更低，更稳定。这些结果意味着，量化的随机动态结构的姿势摇摆使用流动加速度计可能会提供一个有用的诊断工具。(C)2008 Elsevier B. V.保留所有权利。
Recent studies on postural control have shown that the variability of body sway during quiet standing may provide valuable information to characterize changes in postural control due to age, pathology, skill and task. The aim of the present study was to determine - as spade work for possible clinical applications - whether body sway measured with a three-axial accelerometer at the trunk can differentiate between three healthy young populations that differ in athletic skill level. The three groups in question (group size: n = 22) consisted of regular bachelor students, physical education students and physical education students specialized in gymnastics. Data were recorded during tandem stance with eyes open or closed and while standing on foam. The acceleration time-series were analysed in anteriorposterior and mediolateral direction. Differences in postural control were quantified in terms of variability, spectral properties and stochastic dynamical measures, i.c., regularity (sample entropy, long-range correlations) and local stability (largest Lyapunov exponent). The results were clear-cut. Standing with eyes closed and on foam increased variability. Compared to standing with eyes open, standing with eyes closed resulted in less regular sway patterns but with greater local stability, whereas standing on foam had an opposite effect. With greater gymnastic skills, acceleration time-series were less variable, less regular and more stable. These results imply that quantifying the stochastic-dynamical structure of postural sway using ambulant accelerometry may provide a useful diagnostic tool. (C) 2008 Elsevier B.V. All rights reserved.