| 我国优秀女子20 km竞走运动员后半程竞走技术的运动学研究 |
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| 引用本文： | 李建臣,吴玲敏.我国优秀女子20 km竞走运动员后半程竞走技术的运动学研究[J].中国体育科技,2007,43(4):53-59. |
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| 作者姓名： | 李建臣 吴玲敏 |
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| 作者单位： | 1. 首都体育学院,技术学部,北京,100088
2. 湖南工程学院,湖南,湘潭,411100 |
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| 摘 要： | 运用三维运动学分析方法,对参加国际田联竞走挑战赛女子20km比赛前8名运动员后半程中一个复步进行解析。结果表明,我国运动员在后半程中,运用的是步长较短,步频较快的技术风格;腾空时间总体上处于犯规时限的下限,膝关节从着地瞬间直至垂直支撑面保持了可见的伸直状态,但在最后冲刺阶段,膝角出现了模糊伸直过程;身体重心垂直位移、头顶位置上下起伏均高于世界优秀运动员平均水平,这既与踝关节后蹬伸展离地时机偏早、用力动作不充分有关,也与着地瞬间摆动腿前摆后的前伸着地动作不够积极有关。在注意后蹬动作的同时,还应强化摆动腿积极的前摆着地动作。躯干倾角基本处于正常范围之内,但左、右腿蹬伸用力不均衡造成身体重心左、右偏差较大的情况容易导致动作外观不稳定而被判罚技术犯规。我国运动员肩髋扭转角度较小是导致步长相对较短的一个重要成因。
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| 关 键 词： | 竞走 女子 优秀运动员 运动学 技术分析 中国 |
| 文章编号： | 1002-9826(2007)04-0053-07 |
| 修稿时间： | 2007年4月10日 |
Kinematical Study on National Elite Women 20 km Race Walking Athletes' Technique at the Latter Half Course |
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| LI Jian-chen,WU Ling-min.Kinematical Study on National Elite Women 20 km Race Walking Athletes'''' Technique at the Latter Half Course[J].China Sport Science and Technology,2007,43(4):53-59. |
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| Authors: | LI Jian-chen WU Ling-min |
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| Abstract: | Through using the method of three-dimensional kinetic analysis,this paper makes research on the former eighth excellent athletes in the latter half of the 20km walk of the race walking of the IAAF Challenge.The result shows that the technical style of our athletes used is that stride length is shorter and stride frequency is larger,the buckjump time of our players is located at the floor level of the foul limit,the knee angel is unwind from touchdown on upright phase,in the sprint phase,the kneel angel is blurry from touchdown to upright phase,the uprightness displacement of body center and vertex are higher than the international athletes,this since stretching to leave a ground of opportune moment to be partial to early and making an effort action insufficiency with leg driving of the ankle joint relevantly,also with the leg put of front stretch is not enough active at the touchdown ground moment.As behind pay attention to the leg driving in the meantime,should enhance swing leg active of front put ground action.The pitch obliquity of our players was probable in control,but the right deflection and the left deflection were big that were mainly because of two feet energized differently;it lead action external appearance unsteady and is judged as technique foul.The torsional angel of shoulder and coax angel is small.It was one of the reasons why our athlete's stride length is shorter. |
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| Keywords: | 20km |
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