| 灰色关联法在研究垒球投手投球速度与肌群相关性中的应用 |
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| 引用本文： | 郝秀君.灰色关联法在研究垒球投手投球速度与肌群相关性中的应用[J].首都体育学院学报,2011,23(4):364-366. |
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| 作者姓名： | 郝秀君 |
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| 作者单位： | 廊坊师范学院体育学院,廊坊,065000 |
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| 摘 要： | 垒球比赛中的攻守战术是以投手为核心制定的。国外学者普遍认为,"一场比赛中,60%取决于投手"。鉴于国内从事垒球运动的运动员较少,投手的样本量较小,使用常规方法难于分析,故应用灰色系统理论中的灰色关联分析法,对垒球投手身体各关节屈伸肌力水平与出手速度进行相关性分析,以为实施针对性训练提供参考。研究中运用等速肌力测试系统对垒球投手的肩、髋、膝和踝等关节进行测试,测试速度分别取为60°/s和240°/s,依次代表最大肌力和快速肌力水平,选取最大峰值力矩作为研究指标,通过运动学方法测定投手的投球瞬间速度。研究发现,测试关节的屈肌群中,非投掷侧髋和膝关节的快速力量与球速相关系数都在0.8以上;伸肌群中,投掷侧肩关节最大力量与出手速度相关度最高,R=0.813。
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| 关 键 词： | 灰色关联法 等速肌力 垒球 投手 |
Grey Relational Analysis of Softball Pitcher in the Speed and Relevance of Muscle |
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| HAO Xiujun.Grey Relational Analysis of Softball Pitcher in the Speed and Relevance of Muscle[J].Journal of Capital College of Physical Education,2011,23(4):364-366. |
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| Authors: | HAO Xiujun |
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| Institution: | HAO Xiujun Physical Education Institute of Langfang Teachers College,Langfang 065000,China. |
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| Abstract: | In softball games,the choice of defending and attacking tactics is based on pitchers.Most of abroad academician believed that,"In a softball game,60 percents are determined by pitchers." Consider that there are few baseball athletes in our country,and the sample sizes of pitchers are more less,then we apply a Gray Correlation Analysis Method to analysis the relativity between flexor and extensor muscles strength of pitcher’s joints and the leave-hand velocity of softball.Using an isokinetic muscle strength test system,the shoulders,hips,knees and ankles of pitchers were tesed,testing velocity taked as 60°/s and 240°/s to represent the max muscles strength and the pykno-muscles strength respectively.Taking the max peak moment as research index,using kinematics methods to determine the instantaneous leave-hand velocity.The research discovered that,in the flexor group of tests joints,the correlation coefficient between the fast strength of non-throw side hip and knee and the ball velocity are all above 0.8;In the extensor group,the correlation coefficient between the biggest strength of throws side shoulder and the ball velocity is the highest,R=0.813. |
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| Keywords: | Gray Correlation Analysis Method isokinetic muscle strength softball Pitcher |
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