我国优秀女子跳远运动员摆动腿在助跑与起跳阶段的运动学诊断

Kinematics Diagnosis Of Swinging Leg Of Elite Female Long Jumpers During Process Of Taking-Off Phase

运用录像解析的运动学研究方法对8名我国优秀女子跳远运动员和10名美国运动员有关运动学特征进行对比、诊断.研究表明,我优秀女子跳远运动员摆动腿在助跑最后一步蹬伸阶段的伸髋平均水平速度和着板时摆动角速度两项指标上有一定的差距;在助跑最后一步中,摆动腿支撑扇角较大,因此在此阶段不能保持较高水平速度;在助跑最后一步蹬伸阶段中,'屈蹬'技术形成的不够理想,推迟了摆动腿摆动的时机;起跳过程的缓冲阶段是获得垂直速度的主要阶段,加快摆动腿的摆动速度是水平速度损失较小、获得较大垂直的有效途径.

By applying video analyzing method, the article made a contrast and diagnosis between eight Chinese elite female long jumpers and ten American elite female long jumpers. The study revealed that the former exposed a mount of deficiency in the horizontal hip stretching velocity in the pushing phase of last approaching stride and the swinging angular velocity in the take off phase compared with the latter. The reason leading to the deficiency of horizontal velocity is the relatively larger supporting fan shaped angle of the swinging leg in the last approaching stride.