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在田径跳跃项目的教学与训练过程中,常常遇到运动员起跳时跳不起来。腿部力量差固然是跳不起来的重要因素,但有的运动员腿部力量并非差,而就是跳不起来。我认为,这主要与起跳时蹬接配合失调有关,即起跳腿蹬伸时机不对。蹬伸过早或过迟都会影响起跳效果。运动员做起跳动作时,起跳腿与摆动腿是同步进行的。当起跳腿着地时,摆动腿屈膝向上加速摆动。起跳腿具有较大的着地角和较小的两大腿间的夹角,从图1②和图2②可见着地瞬间两腿的剪绞动作是积极的。这时摆动腿在做加速
In the process of teaching and training of athletic jumping events, athletes often can not jump when jumping off. Poor leg strength is of course an important factor in jumping up, but some athletes do not have poor leg strength and can not jump. In my opinion, this is mainly related to the kick-off and kick-off maladjustment, ie the timing of kick-off and kick-out is wrong. Pedaling too early or too late will affect the take-off effect. When the athlete makes a jump action, the jump leg and the swing leg are synchronized. When the legs jump to the ground, swing leg knees upward acceleration swing. Jump leg with a larger ground angle and the smaller the angle between the two thighs, from Figure 1 ② and Figure 2 ② instantly visible legs twisting movements are positive. Then swing the legs to speed up