Kinematic Study On The Technical Characteristics Of The Final Exertion Of Chinese Excellent Female Shot Putter

Shot put,as one of the important throwing events in track and field events,plays an important and useful role in promoting the development of China’s track and field cause,especially the women’s shot put,as a popular gold medal winner in China,has attracted more and more attention from people from all walks of life.Therefore,this article selects the in heilongjiang province in 2019-the national athletics championship and grand prix finals held in daqing,through the selected technology of backward slide of shot put results best eight woman shot-putter last technology as the research object of this paper,to study the excellent shot-put athletes in the last phase of the special technology.In this study,literature method,testing method(shooting and analysis of video data)and mathematical statistics method were adopted as research methods.Firstly,the fixed point,fixed focus and complete whole process of high-speed shooting were obtained.Then,the APAS motion video analysis system was installed and the image measurement system was guided by human model DLT.According to the mode of model nodes,I dot the imported video clips,collate and analyze the data produced,and finally make statistical collation,and draw a chart to be used in the paper for research analysis.Results: Among the 8 female shot putters,Guo Tianqian and Zhang Mengdi spent more time in the final exertion,0.333 s and 0.309 s.Technical connection and time allocation need to be strengthened.The sustained acceleration ability of the right hip of athlete Zhang Linru is relatively strong,which is 3.12m/s,while that of other athletes such as Gong Lijiao(0.58m/s),Jiang Yue(0.61m/s)and Guo Tianqian(0.21m/s)is relatively weak.Gong Lijiao,Zhang Linru and Zhang Mengdi fully extended the left hip at the moment of shot put,170,157 and 167 degrees respectively,while Jiang Yue(142),Bian Ka(156),Chen Xiarong(145),Geng Shuang(153)and Guo Tianxi(150)showed hip flexion at the moment of shot put.Conclusion: In terms of the final exertion time of women’s shot put in China,the technical convergence of each athlete is not very good,and the problem of uneven distribution of technical transition time appears.In the last stage of exertion,Chinese female shot putters are basically stable in the speed of the center of gravity.In terms of joint Angle,the connection between the techniques of the last exertion needs to be improved.In terms of the order of the last exertion,athletes generally exert their right elbow in advance.In the last exertion technique,the extension degree of the right lower limb is relatively insufficient,which has a certain influence on the hip and the center of gravity of the body.In terms of technical parameters of shot-put in the final stage of exertion,the shooting height of female shot-put athletes in China is relatively stable.In terms of shooting speed,all links and techniques are incoherent and unstable.In terms of joint Angle,there is generally insufficient extension of the left hip joint,and relatively insufficient extension of the left knee Angle and the left ankle foot,thus causing the problem of hip flexion.