| （1.苏州大学 体育学院，江苏 苏州 215021；2.南京师范大学 体育学院，江苏 南京 210097） 摘 要：对我国优秀女子跳高运动员郑幸娟倒3步助跑技术进行分析，结果表明：郑幸娟倒3步助跑弧线衔接不流畅，导致助跑水平速度的损失；助跑中两臂摆动动作不规范，倒2步摆动腿“牢固支撑”动作做得不够，直接造成身体内倾角加大；倒两步助跑脚着地瞬间身体重心高度出现上升趋势，从而影响了助跑和起跳的衔接；助跑倒1步身体重心水平速度下降明显，起跳脚着地瞬间身体重心水平速度仅为5.94 m/s，比倒2步下降了0.64 m/s，低于国内外优秀女子运动员；助跑倒1步起跳脚着地瞬间身体重心垂直速度为正值，身体重心呈向上运动趋势。郑幸娟跳高的倒3步助跑技术有待改善。 |
YONG Ming1，ZOU Yu-ling2，LU A-ming1
| （1.School of Physical Education，Soochow University，Suzhou 215021，China；2.School of Physical Education，Nanjing Normal University，Nanjing 210097，China） Abstract: The authors analyzed the last three-step running up technique of ZHENG Xing-juan as an excellent fe-male high jumper in China, and revealed the following findings: the curve of last three-step running up by ZHENG Xing-juan was not connected fluidly, which resulted in the loss of horizontal running up speed; during running up, the swinging move of her arms was not normative, and at the last two steps, the “secure supporting” move of her swinging leg was not well made, which directly caused the increase of the inner tilting angle of her body; at the last steps, the center of gravity of her body rose at the moment her running up foot landed on the ground, which thus af-fected the connection of running up and taking off; at the last step of running up, the horizontal speed of the center of gravity of her body decreased significantly, was only 5.94m/s at the moment her taking off foot landed on the ground, 0.64m/s lower than that at the last two steps, lower than that of excellent female high jumpers at home and abroad; at the moment her taking off foot landed on the ground at the last step of running up, the vertical speed of the center of gravity of her body was a positive value , and the center of gravity of her body showed a trend of going up. The last three-step running up technique of ZHENG Xing-juan needs to be improved. |
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