奥运冠军石智勇与廖辉抓举技术特征的对比分析

A Comparative Study on the Snatch Techniques of Olympic Champions SHI Zhi-yong and LIAO Hui

运用三维运动学的方法,对2016年全国男子举重锦标赛暨里约奥运会选拔赛中,石智勇、廖辉抓举技术特征进行对比分析。研究认为,在杠铃上举过程中,与廖辉相比,石智勇引膝阶段时间较短,膝关节回屈角度小,伸膝提铃阶段时间所占比例较大;在发力阶段,其杠铃重心与身体重心间距过大,上举过程中廖辉的各阶段技术优于石智勇;在接铃各阶段,与石智勇相比,廖辉存在身体重心高度过低、膝关节角度较小以及"两心"间距过大等不足;在接铃各阶段,石智勇的技术要优于廖辉。但整个抓举过程中,与廖辉相比,石智勇杠铃重心的冠状轴存在较大偏移,应进行深入分析。

The method of 3D motion analysis has been adopted to make a comparative analysis on the snatch technique of Shi Zhiyong and Liao Hui, athletes from Zhejiang, in the 2016 National Men＇ s Weightlifting Championships and also the Olympic trials for Rio, Results showed that compare with Liao Hui, Shi Zhiyong is endowed with more significant technical features at every weight rising phase. As Shi Zhiyong spends less time in the transition phase, has smaller angles of knee joint and takes more proportion in First pull phase. Furthermore, in Second pull phase of Shi Zhiyong, the distance between the barycenter of barbell and the center of body weight is too far, so the technique of Liao Hui is better than Shi Zhiyong at weight rising progress. At weight decent progress, the higher center of body weight and lager angles of knee joint of Liao Hui than Shi Zhiyong, in the Catch phase of Liao Hui, the distance between the barycenter of barbell and the center of body weight is too far, so the technique of Shi Zhiyong is better than Liao Hui at weight decent progress. Moreover, in the snatch process of Shi Zhiyong, the barycenter of barbell has a greater shift in the y axis. It should be analyzed deeply.