对我国优秀女子链球运动员投掷技术的运动学分析

发布时间：2018-06-17 18:23

本文选题：女子链球 + 技术动作　；参考：《成都体育学院》2017年硕士论文

【摘要】：选定我国优秀女子链球运动员王峥、张文秀为研究对象。使用2台JVC GC-PX10AC高速摄像机,对王峥和张文秀在比赛时的链球投掷技术动作进行拍摄,其中1号机位于投掷圈正后方5米处,2号机位于投掷圈右后方5米处,机高约1.2米,拍摄频率为50帧/秒,摄像机的主光轴夹角约为90°.对链球的预摆到出手的全程动作过程进行拍摄。采用北京森淼鑫公司开发研制的星高钛3D Signal TEC V3.2HDC解析系统对拍摄的录像进行解析,解析时采用逐幅解析,得到投掷技术动作的相关运动学参数,然后对这些运动学参数进行分析。其主要的分析结果如下:(一)我国运动员在预摆阶段的用时与库岑科娃相比更长,这将会导致链球的预摆速度过慢,进而导致本应该在预摆阶段为链球加速的任务,不得不延迟到下一阶段来完成,这样就增加了旋转阶段的压力。(二)在旋转的第一圈、第二圈右脚着地时刻,王峥和张文秀的肩髋角度均大于300,表明躯干扭转的较好,有利于右脚提前进入双支撑和延长双支撑的时间;然而,随着旋转圈数的增加,在第三、四圈右脚着地时刻,肩髋角逐渐减小。使右脚过晚的着地,增加了单脚支撑的时间,不利于链球的加速。经过分析发现,造成在后两圈肩髋角变小的原因可能是,在链球旋转速度达到一定程度时,运动员必须靠躯干后倾来维持身体平衡,以减小速度为代价以维持身体的动态平衡。(三)我国运动员的出手高度与库岑科娃相比没有明显的差距,但是在链球出手速度和出手角度方面,我国运动员与世界优秀运动员库岑科娃均有一定差距,而这也正是造成我国运动员链球成绩不如外国运动员的重要原因。因此,希望我国运动员在链球投掷的完整技术动作中,更加重视最后用力阶段链球的出手速度。通过对我国优秀女子链球运动员王峥、张文秀技术动作的重要运动学参数进行分析,得到她们掷链球技术动作的运动学特征,这对于提高王峥、张文秀链球技术水平具有重要的实践意义,同时也丰富了投掷链球动作技术的理论。
[Abstract]:Wang Zheng, Zhang Wenxiu, an excellent Chinese female sprocket player, was chosen as the research object. Using two JVC GC-PX10AC high-speed cameras, Wang Zheng and Zhang Wenxiu were photographed during the match. Among them, plane 1 was located at 5 meters behind the throwing circle, and plane 2 was located at the right rear of the throwing ring at 5 meters, and the plane was about 1.2 meters high. The shooting frequency is 50 frames / s and the angle of the main optical axis of the camera is about 90 掳. Shoot the whole action process from the pre-swing of the chain ball to the shot. The video was analyzed by using the satellite high titanium 3D signal TEC V3.2HDC analytical system developed by Beijing Senmiao Xin Company. Then these kinematics parameters are analyzed. The main results of this analysis are as follows: (1) the time spent by Chinese athletes in the pre-swing phase is longer than that of Kuzhenkova, which will lead to the slow pre-pendulum speed of the chain ball, which will lead to the task that should have been accelerated for the chain ball in the pre-pendulum stage. It has to be delayed to the next stage, which increases the pressure on the rotation phase. (2) both Wang Zheng and Zhang Wenxiu had shoulder and hip angles greater than 300 at the first lap and the second right foot landing, indicating that torsion of the trunk was better, which was conducive to the advance entry of the right foot into the double support and the prolongation of the double bracing time; however, As the number of circles increases, the shoulder-hip angle decreases gradually at the third and fourth circles when the right foot lands. The right foot too late to the ground, increased the time of one-foot support, is not conducive to the acceleration of the ball. After analysis, it is found that the reason for the decrease of shoulder and hip angle in the last two circles may be that when the speed of the chain ball rotates to a certain extent, the athlete must lean back to maintain the balance of the body and maintain the dynamic balance at the cost of reducing the speed. (3) there is no obvious difference between the height of Chinese athletes and Kuzhenkova, but there is a certain gap between the Chinese athletes and the world elite athletes Kuzhenkova in terms of the speed and angle of the chain shots. This is also the important reason that our country athlete chain ball achievement is inferior to the foreign athlete. Therefore, it is hoped that Chinese athletes will pay more attention to the speed of the final exertion in the complete technical action of the throwing of the chain ball. Through the analysis of the important kinematics parameters of the technical movements of Wang Zheng and Zhang Wenxiu, Chinese excellent female sprocket athletes, the kinematics characteristics of the technical movements of throwing the sprocket are obtained, which can improve Wang Zheng. Zhang Wenxiu's technical level of chain ball has important practical significance and enriches the theory of throwing sprocket action technique.
【学位授予单位】：成都体育学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：G824.4

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