Biomechanical Analysis of the Back Sliding Techniques of Li-jiao GONG

Abstract

The main technical factors affecting the shot-putter’s performance are studied from the biomechanical perspective with emphasis on the speed rhythm. Li-Jiao GONG, the silver medal winner of the women's shot put at 2015 World Championships in Athletics, is chosen as the research object. The results show that the sliding initiation technique of GONG is good with a desirable angle between the leg and the ground (ALG); in the transitional stage, the shot velocity increases but the barycentric velocity decreases owing to too long a supporting time caused by her poor concession capability and the ability to quickly transfer to the forward acceleration; in the last exertion, GONG’s distinct acceleration point (exerting point) leads to significant increase of shot velocity.