| （1.华南师范大学 博士后流动站，广东 广州 510006；2.西安体育学院，陕西 西安 710068） 摘 要：采用运动生物力学测试、解析等方法，对我国优秀女子链球运动员王峥多年的竞赛成绩和技术变化进行分析，研究发现：随着成绩提高，王峥在技术上每圈双支撑阶段时间和器械轨迹呈逐渐增加的趋势，所占比例也逐渐增加，而单支撑阶段时间和器械轨迹呈逐渐缩短的趋势，技术更趋于合理。器械出手瞬间角度逐渐减小、器械水平速度逐渐增加、垂直速度逐渐减小，最后用力参数模式更加合理。现阶段存在的主要问题是：3、4圈左膝关节蹬伸幅度较大，肩带肌肉群舒展幅度不够，还有提高的空间。此外，3、4圈也存在器械斜面角偏大，器械高点位置偏高的现象。 |
DONG Hai-jun1，2
| （1.Postdoctoral Station，South China Normal University，Guangzhou 510006，China；2.Xi’an University of Physical Education，Xi’an 710068，China) Abstract: By using such methods as sports biomechanical test and analysis, the author analyzed the performance and technical changes of WANG Zheng as an excellent Chinese female hammer thrower over the years, and revealed the fol-lowing findings: with her performance improved, technically, at each turn, the time used and the instrument track produced by WANG Zheng at the double support stage showed a gradual increase, and the proportion increased gradually, while the time used and instrument track produced at the single support stage showed a gradually shortening trend, her technique tended to be rational; at the moment she released the instrument, the angle decreased gradually, the instrument’s horizontal velocity increased gradually, its vertical velocity decreased gradually, her final power explosion parameter mode was more rational; at the current stage, she had the following main problems: at turns 3 and 4, her knee joint stretching amplitude was too great, and her shoulder muscles stretching amplitude was insufficient, which need to be improved, moreover, the in-strument’s bevel angle was on the big side, and the instrument’s peak position was on the high side. |
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