Energetics and mechanics for partial gravity locomotion.
Energetics and mechanics for partial gravity locomotion.
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部分重力运动的能量学和力学。
DOI：
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发表时间：
1994
影响因子：
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通讯作者：
B. Webbon
中科院分区：
文献类型：
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作者：
D. Newman;H. Alexander;B. Webbon
重力加速度对人类运动的作用还不清楚。据推测，运动的力学和能量学取决于当时的重力水平。使用独特的人类水下跑步机和可调节的压载背带来模拟部分重力环境。本研究包括生物力学和能量学两个方面的研究。受试者施加在安装在跑步机上的分离板测力平台上的垂直力显示，随着重力水平的降低，峰值垂直力和步频显著降低（p < 0.05），而地面接触时间与重力水平无关。在宽范围的速度（约1.5米/秒至约2.3米/秒）内采用跳跃步态，这表明月球（1/6 G）和火星（3/8 G）运动的力学发生了变化。正如理论预测的那样，部分重力水平下的运动能量需求明显低于1G（p < 0.05）。
The role of gravitational acceleration on human locomotion is not clearly understood. It is hypothesized that the mechanics and energetics of locomotion depend upon the prevailing gravity level. A unique human-rated underwater treadmill and an adjustable ballasting harness were used to stimulate partial gravity environments. This study has two research aspects, biomechanics and energetics. Vertical forces which are exerted by subjects on the treadmill-mounted, split-plate force platform show that peak vertical force and stride frequency significantly decrease (p < 0.05) as the gravity level is reduced, while ground contact time is independent of gravity level. A loping gait is employed over a wide range of speeds (approximately 1.5 m/s to approximately 2.3 m/s) suggesting a change in the mechanics for lunar (1/6 G) and Martian (3/8 G) locomotion. As theory predicts, locomotion energy requirements for partial gravity levels are significantly less than at 1 G (p < 0.05).