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根据着地缓冲时，从脚着地开始到人体质心投影点移到着地点的上方止，支撑腿踝关节角度的变化和脚的运动特点，论证着地缓冲时，从脚着地开始到人体质心投影点移到着地点的上方止，人体有减速运动时期和加速运动时期。得出：着地缓冲开始瞬间的“扒地式”着地技术的好坏对减小人体在着地缓冲时受到与人体运动方向相反的支撑反作用力的水平分力大小和增大步长起着关键性作用。通过对着地缓冲时的生物学特点的分析，解释短跑运动实践中流传的“脚弓越高，着地缓冲速度越快”的感性经验。
According to the ground buffer, starting from the foot began to move the human body center of mass projection point above the stop, support leg ankle angle changes and foot movement characteristics, demonstrated that the buffer, starting from the foot to the body center of mass projection Moved to the top of the place only, the body has a deceleration period and accelerated movement period. Draws the conclusion that the ground-penetrating technology of ground-breaking at the beginning of the ground-cushioning is crucial to reducing the horizontal component of force and increasing the step-length of the counter-reaction force that is opposite to the direction of human body movement when the human body is buffered in the ground effect. Through the analysis of the biological characteristics of the buffer against the ground, explain the perceptual experience of “the higher the arch of the foot, the faster the ground buffer speed” circulating in the practice of the sprint movement.