对沙地跳跃练习提高弹跳力作用的动力学机制进行了试验研究 ,结果表明 ,经过一定时期的沙地跳跃训练 ,实验对象硬地原地纵跳高度显著提高 ;沙地跳跃练习提高弹跳力作用的动力学机制表现为 :起跳动作过程中缓冲后期和蹬伸后期的时值延长 ;缓冲后期制动动作幅度增大 ;蹬伸后期蹬伸动作幅度增大 ;蹬伸前期和蹬伸后期峰值力和蹬伸冲量显著提高 The experimental study on the dynamic mechanism of sand jumping to improve the jumping force shows that after a certain period of sand jumping training, the jumping height of the original hard ground is significantly increased; sand jumping exercises improve the jumping force The kinetic mechanism is as follows: the duration of the post-stroke and the post-stroke extension is prolonged during the take-off; the amplitude of the late-stroke braking action is increased; the amplitude of the kick-out motion at the late stage of kicking and stretching is increased; And pedal stretch significantly increased