Spring-Like Properties of Muscles and Reflexes in Running
Spring-Like Properties of Muscles and Reflexes in Running
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跑步时肌肉的弹簧特性和反射
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
T. McMahon
中科院分区：
文献类型：
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作者：
T. McMahon
跑步本质上是弹跳的想法可能是一个古老的想法，但Cavagna等人（1976）提出了第一个好的定量证据。利用人体匀速行走和跑步的测力板，计算了人体质心的动能和重力势能的波动。在行走中，计算表明，向前动能的变化与重力势能的变化不相一致，因此在行走的整个步骤中，质心的总机械能几乎是稳定的。在跑步过程中，动能和引力能的波动被发现是同相的，因此在一个步骤中，两者的总和发生了很大的变化。简单地说，在走路时，身体在前进动力最小的时候是最高的，在步的中间（当臀部超过脚踝的时候）。在跑步时，从图37.1的频闪照片中可以看出，在中间阶段身体最低，此时正向动能最小。
The idea that running is essentially bouncing may be an ancient one, but the first good quantitative evidence for it was presented by Cavagna et al. (1976). Force-plate measurements of steady- speed human walking and running were used to calculate fluctuations of the kinetic energy and the gravitational potential energy of the body’s center of mass. In walking, the calculations showed that changes in forward kinetic energy were out of phase with changes in gravitational potential energy, so that the total mechanical energy of the center of mass was nearly steady throughout a walking step. In running, the kinetic and gravitational energy fluctuations were found to be in phase, so that large changes in the sum of the two took place during a step. A simple way to put this is to say that in walking, the body is highest at the moment the forward kinetic is least, in mid-step (when the hips pass over the ankles). In running, as may be seen in the strobe photograph in Figure 37.1, the body is lowest in mid-step, when the forward kinetic energy is least.
DOI：
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发表时间：
1988-09
期刊：
The Journal of experimental biology
影响因子：
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作者：
N. Heglund;C. Taylor
通讯作者：
N. Heglund;C. Taylor