Upright standing can be approximated to a single inverted pendulum with high demand on the multi-muscle coordination of trunk hips thighs and calves to counter gravity请润色上述句子
The act of standing upright can be likened to that of a single inverted pendulum, which requires a high level of multi-muscle coordination in the trunk, hips, thighs, and calves to counteract the force of gravity.
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