Ohsato Y
Department of Orthopaedic Surgery, Nagasaki University School of Medicine, Japan.
Nihon Seikeigeka Gakkai Zasshi. 1993 May;67(5):440-8.
In order to correlate the trunk rotation and arm swing with walking, the angular change of the horizontal rotation of the shoulder and pelvic girdle, and of the arm swing during one stride were recorded simultaneously in connection with the ground reaction force (GRF). The pelvic girdle rotated clockwise early in the left stance phase and then described a counter-clockwise rotation, while the shoulder girdle rotated in an opposite direction to the pelvic girdle. The shoulder girdle rotation, however, stopped transiently in accordance with the acceleration phase in the GRF. The maximum extension of the arm swing was coincident with the immobility period of the shoulder girdle. From above findings, it may be concluded that the arm swing is affected by the acceleration force of the contralateral through counter-rotation of the trunk, and that the stability of the upper body is maintained by stopping of the shoulder girdle rotation.
为了将躯干旋转和手臂摆动与步行相关联，在记录地面反作用力（GRF）的同时，同步记录了一个步幅中肩部和骨盆带水平旋转的角度变化以及手臂摆动的角度变化。骨盆带在左侧支撑期早期顺时针旋转，然后逆时针旋转，而肩胛带的旋转方向与骨盆带相反。然而，肩胛带的旋转会根据GRF中的加速阶段短暂停止。手臂摆动的最大伸展与肩胛带的静止期一致。从上述发现可以得出结论，手臂摆动受对侧通过躯干反向旋转产生的加速力影响，并且上半身的稳定性通过肩胛带旋转的停止得以维持。
