Kinematic Evaluation And Construction Of Diagnosis System On Elite Women Weightlifters' Snatch Technique In China

The weightlifting is a typical sport project which belongs to the physical stamina sort of pace strength. Modern women's weightlifting match from U.S.A. holding the first whole America women's weight lifting championship in 1981 to the Beijing Olympic Games in 2008, has already come over for 27 years. Women's weight lifting is a advantage event of our country, also a key item of the Olympic gold of our country. But due to the fast improvement of each national women's weight lifting in the world, it has already begun to assault the advantage event of our country in recent years, and gradually narrowed down the gap with our country. So, if we want to keep the advantage status of the weight lifting project, we must insist on scientific training and take the road of innovation. During the practice of training, the evaluation and diagnosis on athlete's technique current situation are the beginning of the sports training course, are the prerequisite and foundation of determing scientificity of training plan, but the quantification,visualization, facilitation and informationization of movement technique are the necessity of scientific development. In view of the above-mentioned factors,we put forward this subject "buiding up kinematic evaluation and diagnosis system on elite women's lifters'snatch technique in China".This research depended on movement training theories studying the structure of women's snatch technique, using literature mothed, investigation method, film shooting method, imagination analysis method, logical and dialectical method and statistics method and so on, set out from the multidimensional angle of the system theory, adopting analytic hierarchy process in operations research doing a brand-new survey of snatch technique structure. As the research object with the technique movements of 82 athletes who participated in the 10th and 11th National Games, also they are the top six of snatch project athletes, adopt the film shooting and imagination analysis method to study kinematic parameters of 82 athletes' snatch technique. At last, aggregate each sub-system of athletes'snatch technique into a integrated system, having those results as follows:(1)Using questionnaires, expert interviews, dynamics analysis framework of snatch technique and principal factor analysis,respectively establish large class and small class of our outstanding women's weightlifting athletes'evaluation and diagnosis system of snatch technique training level. The system consists of the overall technique kinematics parameters and details technique of snatch technique. Big-level and small-level women's weightlifting athletes'overall snatch technique kinematic parameters, mainly contain protracting knees raising bell, traction knee raising bell, spreading body acceleration power ratio (%),barbell raising height (%), spending time (%), bell Vy increment (%) etc.,totally there are 12 indicators; From 103 kinematic parameters choosing 23 kinematic indicators as snatch detail parameters, and then sort these indicators into six major biomechanical factor respectively, which according to the size of the contribution rate of eigenvalues.The order is the first burst-force factor, meet barbell factor, burst-force posture factor, horizontal movement factor, the hit down power factor, the second burst-force factor.(2)Based on the index system of snatch technique, summarize the kinematic characteristics of snatch technique for our national elite big level and small level women weightlifers about overall technique and detail technique.(3)Adopting eigenvalue method, correlation test and special theory, set up the overall technique model and detailed technique model about evaluation and diagnosis of women'snatch technique training level.(4)Establish elite women'snatch technique score evaluation system, which includes the overall technique score evaluation criteria table and detailed technique score evaluation criteria table of our national elite women athletes.(5)Constitute diagnosis system of Chinese elite wonien weightlifters' snatch technique, which includes diagnostic methods and diagnostic decision supporting knowledge datebase. Diagnostic methods, contain model diagnostic method of snatch technique and technique eigenvalue diagnostics. And then put diagnostic systems into practice.(6)Summarized some issues of our national elite women weightlifters' snatch technique, detailed technique focused on the bend knee angel is not enough, stretching hip is a little earlier, burst-force is too large, stretch range is too small and so on; chaining technique focused on the leading knee technique, stretching burst-force technique, meet barbell technique, inertia up technique, and gave some corresponding countermeasures.(7)Forming computer application development and design ideas for evaluation and diagnostic system of Chinese elite women's weightlifter' snatch technique.According to those results, put forward some suggestions as follows:(1)During the women's snatch training practice, we should correctly understand and comprehensive understanding the meaning of the overall technique, then re-understand the outstanding technique requirements of snatch projects, adhere to the "fast and accurate" as the guiding ideology of the core technical training, then develop the scientific system traing following this new type of the scientific notion. And further applicate multi-disciplinary knowledge and scientific equipment to enhance the study of methodological about weightlifters'technical training system.(2)Chinese women's weightlifting athletes during the snatch of technical training should strengthen burst-force technique, meet barbell technique, inertial up technique, then bell skills training to improve traction knees, burst-force technique, perfect the overall technique of snatch, in order to maintain our advantage stage in snatch.(3)Recommendations about athletes'technique training:using more high-captured, those who capture pad, laptop grasp, grasping bell pads, trailer grasp, vertical grasp, narrow high-grasp, wide-elbow pull, snatch wide support and back of the neck quite squat exercise.