Kinematic Diagnosis of Throwing Motion of the Chinese Elite Female Discus Athletes Who Are Preparing for the Tokyo Olympic Games

Abstract

The purpose of this study was to examine the difference of kinematic skill characteristics between the Chinese and world elite female discus athletes. We used the methods of literature, three-dimensional video analysis, and mathematical statistics to compare and analyze the differences of some kinematic parameters between the three Chinese female discus athletes and four world female discus athletes. The result shows that the speed of discus release of the Chinese elite female discus athletes is lower ( $p<0.05$ ) than that of the world elite female discus athletes. Compared to the world elite female discus athletes, the height of release is higher ( $p<0.05$ ). But there was no significant difference in the angle of release ( $p>0.05$ ), rotation rhythm ( $p>0.05$ ), and discus speed increment ( $p>0.05$ ) in different stages during the throwing procedure from double support stage to delivery stage. The results may provide reference for the special technique training of the Chinese female discus throwers, so as to improve the discus throwing level of Chinese women.