Through video analysis,this paper analyzes the changing feature of body gravity horizontal speed and vertical speed during the athelets＇ taking-off.The results show that the ratio of body gravity horizontal speed at the maximum buffer moment to body gravity horizontal speed at the board-leaving moment is an important index to evaluate the buffer capacity.However,the suitability degree of horizontal speed loss rate should depend on athelets＇ technique characteristics as well as their physical quality,which shouldn＇t be lumped together.%通过录像解析法对跳远运动员起跳过程中身体重心水平速度及垂直速度的变化特征进行分析。结果表明,最大缓冲瞬间身体重心垂直速度与离板瞬间身体重心垂直速度的比值是评价缓冲能力的一项重要指标。而水平速度损失率的适宜程度应根据运动员的技术特点以及其身体素质来决定,不能一概而论。
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