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选择步行速度、步频和步长以优化头部和骨盆加速度的稳定性。

Walking speed, cadence and step length are selected to optimize the stability of head and pelvis accelerations.

作者信息

Latt Mark D, Menz Hylton B, Fung Victor S, Lord Stephen R

机构信息

Department of Geriatric Medicine, Westmead Hospital, Westmead, NSW, Australia.

出版信息

Exp Brain Res. 2008 Jan;184(2):201-9. doi: 10.1007/s00221-007-1094-x. Epub 2007 Aug 24.

Abstract

The aim of this study was to evaluate the hypothesis that an individual's preferred or usual walking speed, step length and cadence optimize the stability of head and pelvic accelerations in vertical (V), anterior-posterior (AP) and medio-lateral (ML) planes when walking. Acceleration patterns of the head and pelvis were recorded in ten healthy young adults as they walked on a level surface in three separate experiments: (1) walking at five different speeds, ranging from very slow to very fast; (2) walking in time to a metronome set at five different cadences, ranging from 33 to 167% of subjects' usual cadence; and (3) walking at five different step lengths varying from very short to very long while keeping in time with a metronome set at cadences 67, 100 and 125% of usual cadence. The results indicated that acceleration patterns in the V and AP planes were most stable when subjects walked at their usual cadence and step length. In the ML plane, stability was suboptimal, but still adequate, with the usual cadence and step length. The findings suggest that healthy young people walk in a manner that maximizes V and AP stability while maintaining adequate, though suboptimal ML stability.

摘要

本研究的目的是评估这样一种假设

个体偏好的或通常的步行速度、步长和步频能在行走时优化头部和骨盆在垂直(V)、前后(AP)和内外侧(ML)平面上加速度的稳定性。在三项独立实验中,记录了10名健康年轻成年人在水平面上行走时头部和骨盆的加速度模式:(1)以五种不同速度行走,从非常慢到非常快;(2)随着节拍器以五种不同步频行走,步频范围为受试者通常步频的33%至167%;(3)以五种不同步长行走,从非常短到非常长,同时随着节拍器以受试者通常步频的67%、100%和125%行走。结果表明,当受试者以其通常的步频和步长行走时,V平面和AP平面上的加速度模式最稳定。在ML平面上,稳定性次优,但在通常的步频和步长下仍足够。研究结果表明,健康的年轻人行走方式能在保持足够(尽管次优)的ML稳定性的同时,使V和AP稳定性最大化。

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