短跑运动员在跑动中摆动腿前摆动作迟缓,主要表现在两个方面:一是支撑腿后蹬转换为前摆的时间较长;二是摆动腿前摆速度缓慢。支撑与摆动是短跑中相互交替的两个动作,而摆动腿前摆的速度是人体获得向前运动的重要动力。在教学与训练中,大都采用抗阻力摆腿的练习方法,增大髋屈肌群的收缩力量,以达到提高摆动腿前摆速度的目的。从训练实践中我们得知,髋屈肌群力量的增长并非与前摆的速度成正比,摆动腿前摆的速度不仅与髋屈肌群收缩力量有关,而且 Sprinter swing in the running swing leg slow, mainly in two aspects: First, the support leg back to swing before the conversion of a long time; second swing swing legs slow speed. Support and swinging are two movements alternating with each other in the sprint. The speed at which the swinging leg is placed beforehand is an important motivation for the human body to obtain forward movement. In teaching and training, most of the practice of anti-resistance leg swing exercise, increase the contractility of the hip flexor group, in order to achieve the purpose of increasing the swing swing leg speed. From the training practice, we learned that the growth of hip flexor strength is not proportional to the speed of the anterior pendulum, the speed of swinging the anterior leg is not only related to the contractile strength of the hip flexor muscles, but also