Compensatory stepping: The biomechanics of a preferred response among older adults
Compensatory stepping: The biomechanics of a preferred response among older adults
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DOI：
10.1080/03610730109342354
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发表时间：
2001-10-01
影响因子：
1.8
通讯作者：
Woollacott, MH
中科院分区：
文献类型：
--
作者：
Jensen, JL;Brown, LA;Woollacott, MH
本研究的目的是评估与年龄相关的力学差异的补偿步进反应的平衡威胁。一个移动的平台被用来扰乱16个年轻人（21至35岁）和19个老年人（68至88岁）的平衡。向后平台平移包括15 cm位移，峰值加速度范围为9.4至15.2 m/s（2）。老年人更有可能使用一个步骤来恢复平衡，并在较低的扰动幅度比年轻的成年人走。组间差异没有发现在时间步启动或节段动量。缺乏群体差异的势头表明，情人扰动加速度创造了一个相等或更大幅度的身体运动在老年人相比，更高的加速度，年轻人经历的。老年人也表现出减弱输入加速度的能力降低，并经历了显着更大的线性加速度的头部。
The purpose of this study was to evaluate age-related differences in the mechanics of the compensatory stepping response to balance threats. A moving platform was used to disturb the balance of 16 younger (21 to 35 years) and 19 older (68 to 88 years) adults. Backward platform translations consisted of 15-cm displacements with peak accelerations ranging from 9.4 to 15.2 m/s(2). Older adults were more likely to use a step to recover balance and stepped at lower perturbation magnitudes than younger adults. Group differences were not found in time to step initiation or segmental momentum. The lack of group differences in momentum revealed that lover perturbation accelerations created an equivalent or greater magnitude of body motion in older adults compared to higher accelerations experienced by,younger adults. Older adults also showed a reduced ability to attenuate the input acceleration and experienced significantly greater linear acceleration of the head.