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来自维基百科，自由的百科全书
平衡能力是指一个人维持自己身体的重力线（穿过质心且与地面垂直的线）与地面垂直的能力[1]。当一个人的平衡能力不佳，他的身体就会出现剧烈摇摆，即这个人即使静止不动，他的质心依然会相对于地面移动。受各种因素影响，人体会不可避免的出现一定程度的摇摆。[2]
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