| 摘要: |
| 采用Dartfish解析法，选取角度、高度、距离等指标，对巩立姣在2012年伦敦奥运会上最好成绩2022 m的推铅球滑步技术进行运动学分析，并与新西兰选手ADAMS Valerie进行比较，指出：巩立姣在团身动作阶段，右腿屈膝程度小，呈现躯干下潜、臀高肩低的姿态；在背向滑步右脚离地瞬间，左腿摆动过高，重心向投掷方向移动不充分、躯干起伏较大；在右脚着地瞬间，滑步距离较短、左侧肢体的回扣松散，超越器械幅度小；在左脚着地瞬间，左脚落于投掷中线上，两脚间左右距离过小、前后距离过大，超越器械不充分。针对以上问题，提出改善建议，为其今后技术训练和水平提升提供参考。 |
| 关键词: 巩立姣 铅球 滑步技术 运动学 屈膝 重心移动 滑步距离 两脚间距 |
| DOI： |
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| 基金项目:河北省体育局体育科技研究项目“优秀运动员巩立姣的推铅球技术分析及专项体能训练”（20141020） |
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| Kinematical Analysis on Gong Lijiao’s Sliding Technique of the Best Throwing Result of Shot Put in London Olympic Games |
| CUI Dong-xue |
| (School of Physical Education, Hebei Normal University) |
| Abstract: |
| By Dartfish analytical method, kinematic analysis of Gong Lijiao’s best result of 20.22 meters in the 2012 London Olympic Games is carried out by the indexes such as angle, height and distance, and after being compared with Adams Valerie from New Zealand, it is pointed out that Gong Lijiao’s right leg made relatively small flexion degree, showing torso submergence with a posture of high hip and low shoulder; at the right leg’s takeoff instant in backsliding, her left leg swung too high, the gravity center moved sufficiently to the throwing direction, torso fluctuates acutely; at the right leg’s landing instant, she made comparatively shorter sliding distance, her left limb possessed loose withdrawal toward her gravity center, her body made small degree surpassing the apparatus; at the left leg’s landing instant, her left foot landed on the throwing midline, the horizontal distance between both feet is too short, while the vertical distance is too long, her body insufficiently surpassed the apparatus. In view of the above issues, some suggestions are put forward for improvement and reference for her future technical training and improvement. |
| Key words: Gong Lijiao shot put sliding technique kinematics knee flexion moves of gravity, sliding distance distance between two feet |
