Three-dimensional Kinematic Mechanism Research on Women's Shot Put Technique of Medalist in the Jinan National Games
The method of close-range machine three-dimensional camera and three-dimensional kinematics is adopted to analyze the technique of top 3 shot putters in Jinan National Games.The result shows that in the slide stage,the highest speed of LI ling swinging leg appear in the right pedal from the earth moments,left leg swinging way is not reasonable.The moment of LI Ling and LI Mei-ju right foot hit the ground body center of gravity velocity and shot put velocity are more differ and affect outstrip apparatus operative effect.The three athletes' right coxa velocity are greater than left coxa velocity in transition period which is advantageous to coxa axis of abscissae's making longer to be available of the outstripping of shoulder axis of abscissae and the body muscles.The three athletes' right coxa,right shoulder,right elbow and velocity of 4 links are gradually increased,and this is the performance of high horizontal technique character of athlete.Three athletes' left supporting pedal techniques is not very ideal,the moment of shot exists different degree of hip flexion bending phenomenon,which impact the force effect.