男子二级跳远运动员起跳阶段摆动腿技术的运动学分析

摘要

The use of literature, mathematical statistics and research methods of image analysis, two long jump kinematic studies. The results show that:(1)Second Level Jumpers average 0.130s buffer time average of 0.048s, kicking average time of 0.082s. Buffer time, kicking the time of the take-off time is too long. There is a great relationship with the two athletes physical fitness and the pros and cons of the action; (2)Second Level athletes with the board the moment, the swinging of the swinging leg angular velocity average of 451.72°/s to 87.14° knee angle on board speed of 8.58m/s, and is different from the previous studies;(3)Second Level athletes speed utilization rate of 76.30%, speed utilization is significantly lower than the rate of utilization of the excellent sports. The average flight angle to 26.66°, significantly higher than the elite athletes of the 18°-25°; (4)The maximum angular velocity swing kicking a significant positive correlation with the flight angle and achievements.%文章运用文献资料、数理统计和图像解析的研究方法，对二级跳远运动员的运动学指标进行研究。结果表明：（1）二级运动员起跳时间平均值是0.130s，缓冲时间平均值为0.048s，蹬伸时间平均值0.082s。缓冲时间、蹬伸时间与整个起跳时间过长。这与二级运动员本身身体素质和技术动作的优劣存在很大关系；（2）二级运动员着板瞬间，摆动腿的摆动角速度平均值为451.72°/s，膝关节角度平均为87.14°上板速度为8.58m/s，与前人的研究有出入；（3）二级运动员速度利用率为76.30%，速度利用率明显低于优秀运动的速度利用率。腾起角平均为26.66°，明显高于优秀运动员的18°~25°；（4）在蹬伸阶段摆动角速度的最大值与腾起角和成绩明显正相关。