Your hands control the tension in your upper body, while your arm swing works in conjunction with your leg stride to drive you forward.
你的手控制着你上半身的紧张程度,而你的手臂随着步伐的来回摆动则能给你向前的动力。
Exhale and extend your left arm back to starting position, keeping tension on the towel with your right arm.
呼气同时把你的左臂伸直,右手同时拉直浴巾。
A large tension spring which is unfolded in the curved arm.
曲臂内有将遮阳篷展开的大拉力弹簧。
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