A theory of metabolic costs for bipedal gaits
A theory of metabolic costs for bipedal gaits
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DOI：
10.1006/jtbi.1997.0407
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发表时间：
1997-06-21
影响因子：
2
通讯作者：
Alexander, RM
中科院分区：
文献类型：
--
作者：
Minetti, AE;Alexander, RM
一个简单的模型预测的能量成本的双足运动给定的速度，步长，占空比和形状因素。(The占空因数是脚在地面上的步幅持续时间的分数，形状因数描述施加在地面上的力的模式）。改变参数以找到对于每个速度最小化代谢能量成本的步态。亚历山大先前的模型计算了肌肉必须做的工作，但代谢成本（本文计算）更可能是步态选择的主要标准，该模型对人类步幅和跑步速度做出了很好的预测。它预测较低的占空比和较高的形状因子比通常使用的，但这些步态参数和速度之间的关系平行的经验关系。(C)出版社：Academic Press Limited。
A simple model predicts the energy cost of bipedal locomotion for given speed, stride length, duty factor and shape factor. (The duty factor is the fraction of stride duration, for which a foot is on the ground, and the shape factor describes the pattern of force exerted on the ground). The parameters are varied to find the gait that minimizes metabolic energy cost, for each speed. A previous model by Alexander calculated the work that the muscles have to do, but the metabolic cost (calculated in this paper) is more likely to be the principal criterion for gait selection.The model gives good predictions of human stride lengths, and of the speed at which we break into a run. It predicts lower duty factors and higher shape factors than are normally used, but the relationships between these gait parameters and speed parallel the empirical relationships. (C) 1997 Academic Press Limited.