体育专业两类不同表现跳远运动员最后四步步长运动学分析

Kinematic Analysis on Stride Length of Last Four Strides of Two Different Types of Long Jumpers

本研究中我们对体育专业两类不同表现跳远专项学生最后四步步长进行了分析研究。通过两台摄像机对30名男子跳远专项学生的跳远过程进行记录。通过对两组不同表现运动员最后四步步长和重心速度水平的差异分析发现,两组运动员最后四步步长、运动员最后四步重心高度、最后第四步到最后一步的水平速度均存在显著差异(P<0.5)。两组运动员着地瞬间垂直速度和水平速度存在显著差异(P<0.5)。

Through recording the process of 30 male students＇ long jump by two cameras, the study analyzes stride length of last four strides of long jump students who major in sports and have two different types of performance. By analyzing the difference of stride length of last four strides of the two groups of athletes and the level of center of gravity and velocity, the paper finds out that significant difference （ P 〈 0.5 ） exist between the two groups of athletes in stride length of last four strides, height of center of gravity of last four strides and horizontal velocity from the fourth last stride to the last stride. Vertical and horizontal velocity of the moment athletes step on the ground also display significant difference （ P 〈 0.5 ）.