| Shot put is a kind of fast explosive force leading force,athletes can win in the fierce competition only with exquisite technology and good strength quality.At the present stage,the strength of the women’s shot put team in our country is strong,the construction of the echelon of all ages is gradually improved,the reserve talent of shot put is sufficient,and the results already have the strength of winning the Olympic Games.In-depth analysis of the strength and technical status of athletes at all ages plays an important role in the development of shot put.16-17 years old is the key time to improve the quality of strength,if the athletes of this age group strength quality indicators are systematically studied and analyzed,fully understand the characteristics of women shot putters in the 16-17 years old stage,have a clear and complete concept of strength system and objective evaluation criteria,can provide theoretical basis for scientific training and selection of coaches.In this study,42 female shot putters aged 16-17 were taken as the main subjects,focusing on three aspects: upper limb strength,core strength and lower limb strength.It is completed in four steps: first,consulting literature and visiting experts to collect raw data.The second is to make experts,coaches and athletes analyze and score the original data by issuing questionnaires.Third,according to the results of the investigation,the principal component analysis method is used to carry out the second round of research to determine the index.Fourth,the grey correlation method is used to analyze the proportion of each index in sports items,and then the prediction model of women’s shot put achievement and the comprehensive evaluation standard of strength quality are established on the basis of determining the data.The following are the results of the study:(1)The structure of strength quality consists of three first-level indicators: upper limb strength,core strength,lower limb strength and twelve third-level indicators: grab,push-up bar bell,fast forward,parallel bar arm flexion and extension,push-ups,flat plate support,sit-ups,30 m running,heavy-duty squat,heavy-duty half-squat,jump frame,standing three-stage long jump,each index occupies a different weight.(2)through the method of grey correlation analysis of 12 indexes of performance contribution rate is in turn: snatch > 30 meters running > push barbell > lie on your back fast quite > load squats >plank > the parallel bars arm flexion > push-ups > with crouch > jump bar frame sit-ups.> standing triple jump> sit-ups.(3)Based on the research results of 42 female shot-putters aged 16-17,the evaluation criteria of each individual index were formulated,and then the comprehensive evaluation criteria of strength quality structure were preliminarily formulated by analyzing the weight of each index,hoping to provide reference basis for the shot-putter coaches in the selection of materials and training and contribute their own strength.(4)Prediction model formula of female shot putter performance :Y=-10.525+snatch×0.095+ bench press barbell×0.105+ quick-tacking×0.046+ plank support ×0.038-30 m run×0.365+ weight bearing squat×0.050. |
