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本文采用平面定点扫描摄影法和多元统计分析,对我国13名三级跳远运动员比赛中第二、三跳积极性落地起跳技术进行了研究.研究发现,利用下肢环节转动角速度指标,可以更准确、全面地描述和评价三级跳远积极性落地起跳技术的运动学特征;我国运动员第二跳中有支撑腿鞭打用力的特点,而第三跳有整个支撑腿积极主动向后转动的特点;在第二、三跳远度中,第二跳远度的增加与成绩的增长有显著性相关;在第二跳的落地起跳技术中,我国运动员支撑腿和摆动腿的作用不均衡;摆动腿的技术动作并没有随支撑腿技术动作的变化而产生相应的变化.
In this paper, the study of the second and third jumps of the positive jump in the competitions of 13 triple jump jumpers in China by plane fixed-point scanning photography and multivariate statistical analysis shows that using the rotation angular velocity indexes of lower limb links can be more accurate and comprehensive Describe and evaluate the kinematic characteristics of the active jumping technique of triple jump. In the second jump of Chinese athletes, there is the characteristic of supporting leg whipping force in the second jump while the third jump has the characteristic of the whole supporting leg actively and backwardly rotating. In the second, Among the three jumps, the increase of the second jump distance is significantly related to the growth of scores. In the second jump, the support legs and the swing legs do not work well. The technical actions of the swing legs do not follow Support leg changes in technical action and produce the corresponding changes.