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首页> 外文期刊>Gait & posture >The influence of age, muscle strength and speed of information processing on recovery responses to external perturbations in gait
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The influence of age, muscle strength and speed of information processing on recovery responses to external perturbations in gait

机译：年龄，肌肉力量和信息处理速度对步态对外部干扰的恢复反应的影响

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摘要

Dynamic imbalance caused by external perturbations to gait can successfully be counteracted by adequate recovery responses. The current study investigated how the recovery response is moderated by age, walking speed, muscle strength and speed of information processing. The gait pattern of 50 young and 45 elderly subjects was repeatedly perturbed at 20% and 80% of the first half of the swing phase using the Timed Rapid impact Perturbation (TRiP) set-up. Recovery responses were identified using 2D cameras. Muscular factors (dynamometer) and speed of information processing parameters (computer-based reaction time task) were determined. The stronger, faster reacting and faster walking young subjects recovered more often by an elevating strategy than elderly subjects. Twenty three per cent of the differences in recovery responses were explained by a combination of walking speed (B= -13.85), reaction time (B= -0.82), maximum extension strength (B= 0.01) and rate of extension moment development (B= 0.19). The recovery response that subjects employed when gait was perturbed by the TRiP set-up was modified by several factors; the individual contribution of walking speed, muscle strength and speed of information processing was small. Insight into remaining modifying factors is needed to assist and optimise fall prevention programmes.
机译：适当的恢复反应可以成功地抵消由外部干扰引起的步态动态不平衡。当前的研究调查了如何通过年龄，步行速度，肌肉力量和信息处理速度来调节恢复反应。使用定时快速冲击扰动（TRiP）设置，分别对50名年轻受试者和45名老年受试者的步态模式分别在挥杆阶段前半段的20％和80％处进行扰动。使用2D相机识别恢复响应。确定了肌肉因素（测功机）和信息处理参数的速度（基于计算机的反应时间任务）。与老年人相比，通过提升策略，更强壮，反应更快，走路更快的年轻受试者更容易康复。步行速度（B = -13.85），反应时间（B = -0.82），最大伸展力量（B = 0.01）和伸展力矩发展速度（B）的组合解释了恢复反应差异的23％ = 0.19）。 TRiP设置扰乱步态时受试者采用的恢复反应受到以下几个因素的影响：步行速度，肌肉力量和信息处理速度的个体贡献很小。需要深入了解剩余的修改因素，以帮助和优化跌倒预防计划。

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