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首页> 外文期刊>Journal of Biomechanics >Locomotor stability and adaptation during perturbed walking across the adult female lifespan
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Locomotor stability and adaptation during perturbed walking across the adult female lifespan

机译：在成年女性寿命中的步行过程中运动稳定性和适应性

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The aim of this work was to examine locomotor stability and, adaptation across the adult female lifespan during perturbed walking on the treadmill. 11 young, 11 middle and 14 older-aged female adults (mean and SD: 25.5(2.1), 50.6(6.4) and 69.0(4.7) years old respectively) walked on a treadmill. We applied a sustained perturbation to the swing phase of the right leg for 18 consecutive gait cycles, followed by a step with the resistance unexpectedly removed, via an ankle strap connected to a break-and-release system. The margin of stability (MoS) at foot touchdown was calculated as the difference between the anterior boundary of the base of support (BoS) and extrapolated center of mass. Older participants showed lower MoS adaptation magnitude in the early adaptation phase (steps 1-3) compared to the young and middle-aged groups. However, in the late adaptation phase (steps 16-18) there were no significant differences in adaptation magnitude between the three age groups. After removing the resistance, all three age groups showed similar aftereffects (i.e. increased BoS). The current results suggest that in old age, the ability to recalibrate locomotion to control stability is preserved, but the rate of adaptive improvement in locomotor stability is diminished. (C) 2016 Elsevier Ltd. All rights reserved.
机译：这项工作的目的是检查在跑步机上受干扰的步行过程中运动稳定性以及成年女性寿命的适应性。在跑步机上行走的分别是11名年轻，11名中年和14名老年女性（平均和标准年龄分别为25.5（2.1），50.6（6.4）和69.0（4.7）岁）。我们连续18个步态周期对右腿的摆动阶段施加持续的扰动，然后通过连接至断裂和释放系统的脚踝绑带，意外地消除了阻力。脚着地时的稳定裕度（MoS）计算为支撑基底（BoS）的前边界与外推质心之间的差。与年轻和中年组相比，年龄较大的参与者在早期适应阶段（​​步骤1-3）显示出较低的MoS适应程度。但是，在适应后期（步骤16-18），三个年​​龄组之间的适应程度没有显着差异。消除抵抗力后，所有三个年龄组都显示出类似的后效应（即BoS增加）。当前的结果表明，在老年人中，保留了重新校准运动以控制稳定性的能力，但是运动稳定性的适应性改善率却降低了。 （C）2016 Elsevier Ltd.保留所有权利。

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