在非常慢的人类步行速度下,钟摆能量交换的减少揭示了简单步行模型的偏差。

IF 2.8 2区 生物学 Q2 BIOLOGY
Journal of Experimental Biology Pub Date : 2025-06-15 Epub Date: 2025-06-26 DOI:10.1242/jeb.250042
Timothy K Byles-Ho, Aaron N Best, Amy R Wu
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引用次数: 0

摘要

行走可以建模为一个简单的倒立摆,人体利用动能和重力势能的交换来保持运动。这种交换在正常速度下有很好的记录,但在非常慢的速度下可能会中断。我们通过人体在大范围速度(0.1-2.0 m/s)下行走时势能和动能之间的相移来检测能量转导,特别是捕捉非常慢的速度(
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Reduction of pendular energy exchange at very slow human walking speeds reveals deviations from simple walking models.

Walking can be modelled as a simple inverted pendulum, where the human body takes advantage of exchanging kinetic and gravitational potential energy to remain in motion. This exchange is well documented at normal speeds but could break down at very slow speeds. We examined energy transduction through the phase shift between potential and kinetic energy in human walking at a wide range of speeds (0.1-2.0 m s-1), specifically capturing very slow speeds (<0.6 m s-1). We measured phase shift with two different methods. One method used two classical phase shifts of α and β from ( Cavagna and Legramandi, 2020). The second method utilized cross-correlation across each stride. We calculated phase shift from a human gait study and from two simple inverted pendulum-type walking models ( Srinivasan and Ruina, 2006; Rebula and Kuo, 2015). Participants walked at 13 prescribed speeds between 0.1 and 2.0 m s-1 on a split belt instrumented treadmill. We found that phase shifts increased as speed decreased. However, at speeds slower than 0.3 m s-1, the phase shifts approached zero. The simple walking models were unable to demonstrate phase shift behaviour at any speed. Our study demonstrates that as speed slows, humans walk less similarly to the inverted pendulum models, and more complex models may be required to characterize walking at very slow speeds.

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来源期刊
CiteScore
5.50
自引率
10.70%
发文量
494
审稿时长
1 months
期刊介绍: Journal of Experimental Biology is the leading primary research journal in comparative physiology and publishes papers on the form and function of living organisms at all levels of biological organisation, from the molecular and subcellular to the integrated whole animal.
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