北京世锦赛女子链球运动员冠亚军投掷技术运动学分析.docVIP

北京世锦赛女子链球运动员冠亚军投掷技术运动学分析 　　摘 要：为了我国女子链球项目可持续发展和进一步突破，采用文献资料法、三维影像解析法和数理统计法，对2015年北京世界田径锦标赛女子链球运动员冠亚军的投掷技术进行分析。结果表明：沃尔达兹克具有出手角度大、速度快和出手?c高的技术特点；张文秀出手高度偏低，最后用力阶段速度损失大。沃尔达兹克起转速度快，更注重第三圈技术的稳定性，且通过控制第三圈增速，提升第四圈增速比例，使最后一圈增速明显，由此说明第四圈是链球加速的关键阶段。沃尔达兹克最后用力阶段器械轨迹长，做功效果好；张文秀的链球运行轨迹距离不足；沃尔达兹克在第三、四圈旋转技术和身体控制都非常稳定，张文秀则出现“小-大-小-大”的变化，稳定性受到影响。张文秀在出手时刻的肩髋角过大，最后用力开始阶段肩髋扭转幅度小，影响了出手速度；而沃尔达兹克扭转阶段肩髋角小，最后用力肩髋角大，超越器械能力强。建议张文秀提高最后用力前的超越器械能力，以递增速度完成对链球的旋转加速，纠正旋转阶段的轨迹路线，从而进一步提高技术的合理性。 　　关键词：女子链球；优秀运动员；投掷技术；运动学特征；北京世锦赛 　　中图分类号：G824.4 文献标识码：A文章编号：1006-2076（2017）02-0098-05 　　Abstract：To attain the sustainable development and breakthrough of womens hammer event， this study by using the methods of literature， 3D image analysis， and mathematic statistics to analyze the throwing technique of athletes who have acquired the golden medal and silver medal in 2015 Beijing Championship. The result shows that： Anita Wlodarczyk has the larger optimum release angle and faster release speed and higher angle of altitude； whereas Zhang Wenxius release angle is smaller， and the loss of velocity of Zhangs technique is big in the final exertion. The starting rotation velocity of Wlodarczyk is very fast， and she pays more attention on the stability of the third turn， and increases the ratio of speed enhancing in the fourth turn through controlling the speed of the third turn， so that the crucial stage of increasing the speed of throwing hammer is the fourth turn. The trace of instrument of Wlodarczyk is long in the final exertion， and the efficiency of power is very good； Zhang goes to the opposite. Wlodarczyks rotation technique in the second turn and body controlling is very stable， as Zhangs technique appears the changes of being small-big-small-big， so it affects the stability of her technique. The angle between shoulder and hip of Zhang is too big， but it is very small in the stage of starting the final exertion， so it affects the release speed. While Wlodarczyks angel goes to the opposite， so her stabilit