Upper extremity function in running II. Angular momentum considerations
Upper extremity function in running II. Angular momentum considerations
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跑步中的上肢功能二．
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
R. Hinrichs
中科院分区：
文献类型：
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作者：
R. Hinrichs
10名男性休闲跑步者在跑步机上以3.8 m/s、4.5 m/s和5.4 m/s的速度跑步时，使用三维电影摄影术进行拍摄。利用一个14段的数学模型，研究了手臂对通过身体质心的三个正交轴的全身角动量的贡献。结果表明，虽然身体具有不同数量的角动量对所有三个坐标轴，手臂作出了有意义的贡献，只有垂直分量（Hz）。发现臂在运行周期期间产生交替的正和负Hz模式。这往往会抵消腿的相反Hz模式。研究发现，躯干在这种角动量平衡中是一个积极的参与者，上躯干与手臂一起前后旋转，下躯干与腿一起旋转，但程度较轻。结果是在整个跑步周期中相对较小的全身Hz。上半身和下半身之间的反向关系..
Ten male recreational runners were filmed using three-dimensional cinematography while running on a treadmill at 3.8 m/s, 4.5 m/s, and 5.4 m/s. A 14-segment mathematical model was used to examine the contributions of the arms to the total-body angular momentum about three orthogonal axes passing through the body center of mass. The results showed that while the body possessed varying amounts of angular momentum about all three coordinate axes, the arms made a meaningful contribution to only the vertical component (Hz). The arms were found to generate an alternating positive and negative Hz pattern during the running cycle. This tended to cancel out an opposite Hz pattern of the legs. The trunk was found to be an active participant in this balance of angular momentum, the upper trunk rotating back and forth with the arms and, to a lesser extent, the lower trunk with the legs. The result was a relatively small total-body Hz throughout the running cycle. The inverse relationship between upper- and lower-body...