Kinematical Analysis Of Throwing Step And Final Effort Technique Of Chinese Outstanding Female Javelin Athletes

With the rapid development of the javelin movement, javelin technique training of specialized characteristics increasingly highlight, javelin technique training is not only reflected on the special ability, also reflected in the athletes more special technology, etc. At present, for the study of the motions of javelin, too much emphasis on the special strength training athletes, mechanics characteristics of javelin and so on, to some extent, ignored the special technology to analysis. In this paper, through research to find out our country outstanding female javelin athletes throwing technology gap with the world advanced level, seek countermeasures in difference, make our country athlete’s throwing technology integrating with the world advanced level as soon as possible. This not only can be for reference of other high level athletes in our country, also can promote China’s women’s javelin athletes throwing skill level, to get good results in international competition to lay a technical foundation, win honor for our Olympic plans.This article selects the outstanding women javelin athletes ling wei, lily two players as the research object. By the method of documentation, expert interview method, test method(using a CASIO brand high-speed cameras to 2 d shooting game, using the ariel video analysis system analysis), mathematical statistics method. The throwing step and the final phases of the power of technology analysis and research, analytical athletes the kinematics parameters of each link in the whole technology, for each kinematics parameter comparison between athletes, by studying the following conclusions:(1)li ling wei and lily step two athletes throwing rhythm of "long- long- the longest-short" type, the characteristics of consistent with the international elite athletes throwing technology on step structure. But two people throwing steps of the top two step by step length is larger, the amount of time, more conducive to the acceleration of ahead of time. At the same time, two athletes after they step length to an average of 1.05 m, at an average of 0.35 s, show the steps long, the characteristics of short step, contribute to an athlete center of gravity is volatile. In the final step the average run length of 1.44 m, at an average of 0.195 s showed a large step by step, the partial long, so go against the stability of the feet support, will affect the final power.(2)Zhang li through the analysis of research in the last stage, inadequate torso leaning back did not appear "full bow" inadequate and two people before the torso Angle \ "whipping\" inadequate, insufficient cause body beyond the instrument body acceleration distance, two people hand speed 25.47 m/s and 24.87 m/s has just rolled off the production line to reach the world average. Two players out of the gun, reached the international elite athletes average vertical velocity without "gun" phenomenon appears, but level remains to be faster. Ling wei in the last stretch his legs actively for the last good height. Due to lily knee stretching is insufficient in the last also result in disharmony, action to level fast enough. Relative to ling wei offers lily in the final stage to accelerate the distance of 0.08 m, the last moment cannot effectively will power to the instrument, it is also a cause of the slow to.(3) from the perspective of a run-up in the javelin elevation Angle changes, ling wei and lily two athletes in the run-up in the javelin elevation changes, changes in elevation difference is bigger, not conducive to the stability of the javelin to the. At the same time, based on to speed up to Angle and the Angle of attack in a reasonable scope, but Angle relation will need to be accurate.(4) found in the research of buffer distance, ling wei can buffer distance of 1.8 m is relatively small, make full use of the run-up in the distance, and lily can buffer distance of 2.14 m ling wei long 0.34 m, the length of the run-up loss is larger. Obviously lily in the last run this link is not economic. Also confirms to buffer distance negative correlation with the results of the competition after the idea.