| 刘虹竞走关键技术的运动学特征分析 |
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| 引用本文： | 敬艳,刘建国,蒋纯金,黄鹂,吴佳贤,高聪.刘虹竞走关键技术的运动学特征分析[J].成都体育学院学报,2016(6):37-43. |
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| 作者姓名： | 敬艳 刘建国 蒋纯金 黄鹂 吴佳贤 高聪 |
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| 作者单位： | 1. 北京体育大学研究生院，北京 100084; 湖南工学院体育教学部，湖南 衡阳421002;2. 武汉体育学院田径教研室,武汉,430079;3. 湖南工学院体育教学部,湖南 衡阳,421002;4. 武汉音乐学院公共基础课部,武汉,430060;5. 西安体育学院研究生部,西安,710000 |
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| 基金项目： | 国家体育总局奥运科技攻关课题(2016HT083)。 |
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| 摘 要： | 运用文献资料法、三维定点摄像法、影像解析法等，以刘虹参加2016年全国竞走大奖赛暨奥运选拔赛20km比赛的技术特征为研究对象，对其技术的优缺点进行归纳总结，旨在为其里约奥运会技术改进提供参考。结果表明：总体来看刘虹技术的规范性、实效性特征较好。技术规范性特征具体表现为其腾空时限处于模糊腾空时限内，但是最后冲刺阶段由于提速导致腾空时限远超过临界值。头顶垂直位移稍偏大，摆动腿离地瞬间膝角偏小，垂直膝关节角度同样偏小，且重心移动速度越快，其膝角越小，易形成“跑”的动作表象。着地技术符合裁判员判罚的直腿标准，且垂直支撑阶段“反弓”动作明显。实效性特征表现为左、右步长均有提高，“小步高频”的中国技术风有较大改观；但仍存在左、右不均衡现象。两大腿夹角偏小，说明刘虹向前“送髋”的技术仍需改进。
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| 关 键 词： | 刘虹 竞走 关键技术 运动学 里约奥运会 |
Analysis on the Kinematic Features of Liu Hong’s Key Techniques for Race Walking |
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| JING Yan,LIU Jianguo,JIANG Chunjin,HUANG Li,WU Jiaxian,GAO Cong.Analysis on the Kinematic Features of Liu Hong’s Key Techniques for Race Walking[J].Journal of Chengdu Physical Education Institute,2016(6):37-43. |
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| Authors: | JING Yan LIU Jianguo JIANG Chunjin HUANG Li WU Jiaxian GAO Cong |
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| Abstract: | By way of literature review,three dimensional photography,video analysis,the present paper studies the technical features of Liu Hong’s 20km race walking in the 2016 National Race Walking Grand Prix and Olym-pic Qualification Competition in the hope of providing reference for athletes’competition in the Rio Olympic Games. The results show that Liu Hong’s techniques are standard and effective on the whole. Her techniques have the following features:her flight time span is within the fuzzy time limit,while her flight time at the sprint stage is far over the threshold value as a result of accelerating. Her head’s vertical motion is large,and both her knee angle and vertical knee joint angle are small while her swing leg is off the ground. The faster her cen-ter of gravity moves,the smaller her knee angle is. This makes her walking look more like “running”. Her landing technique meets the straight leg standard,and her “reverse bow”act during the vertical supporting phase is obvious. The effectiveness of Liu Hong’s techniques is as following:both her left and right step dis-tance increase,it greatly changes the traditional style of “small step and high frequency”;but the left - and -right imbalance remains unchanged. The angle between the thighs is small,indicating that Liu Hong’s tech-nique for hip propulsion is yet to be improved. |
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| Keywords: | Liu Hong Race Walking Key Techniques Kinematics The Rio Olympics |
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