The Study On The Construction Of Juvenile Sanda Athletes' Selection Index System In China

Research purposes: This study aims to establish a detailed and appropriate selection index for juvenile Sanda athletes,establish a selection index system for juvenile Sanda athletes,improve and enrich Sanda material selection and theoretical research system,and provide a solid and reliable theoretical basis for the selection of juvenile Sanda athletes.Research Methods: This research has carried out a comprehensive and systematic study on the selection index system of juvenile Sanda athletes in China through literature research,expert interview,Delphi method,questionnaire survey,analytic hierarchy process and mathematical statistics.Research Results:(1)Initially established the index system for juvenile Sanda athletes in China.The first-level indicators include 7 genetic factors,developmental level,body shape,physical quality,physical function,psychological quality and coaches' experience evaluation;15 indicators of secondary indicators : Family survey,bone age,length,circumference,body fat,fullness,general quality,special quality,cardiovascular function,ventilatory function,blood function,response time,nerve type,special technology and will quality;Item: Parental physical fitness,family genetic history,RUS-CHN method,upper limb length,lower limb length,neck circumference,thigh circumference,fat-free body weight,Vervik index,pull-ups,standing long jump,30-meter sprint running,horizontal and vertical fork,10 s vertical sleeper,400 m × 3 intermittent run,15 s fist air strike,1min fist combination sandbags,heart function index,vital capacity,hemoglobin,selective reaction time,boxing method,leg method,wrestling and training / competition style.(2)Through the analytic hierarchy process,the judgment matrix is constructed for the material selection index system,and the third round of expert questionnaire survey is conducted.The final weighting relationship of various material selection indicators was finalized: physical fitness accounted for about 30%,developmental level and body shape accounted for about 30%,psychological and physical functions accounted for about 26%,and genetic and coach evaluation indicators accounted for about 14%..In the special quality index,1 minute boxing and leg combination sandbags and 400meters×3 intermittent running are more important;30 meters sprint running and 10 s vertical standing support are more important in the general quality index;it is more important to choose the reaction in the sports psychological index;Bone age is more important;physical body mass index,fat body weight,lower limb length,and thigh circumference are more important;the will quality is more important in the coach's experience evaluation index;hemoglobin and heart function index are more important in the body function index;genetic factors index The genetic history of the Chinese family is more important.(3)Establish a comprehensive evaluation level of the material selection index system,and make a comprehensive evaluation of the juvenile Sanda athletes by using the fuzzy comprehensive evaluation formula.Research Conclusions:(1)This study identified seven primary indicators through interviews and two rounds of questionnaire surveys of 20 Sanda field experts from 5sports colleges in China and 10 sports training experts from Shanghai Sports Institute. 15 secondary indicators and 25 third-level indicators,established a multi-level,systematic selection index system(2)through the analytic hierarchy process,the analysis of the selection index system structure,and finally the physical quality,psychological quality and development level It is the most important factor in the selection of juvenile Sanda athletes.(3)Using the fuzzy comprehensive evaluation formula to make a comprehensive evaluation of the juvenile Sanda athletes,and then make an overall comprehensive evaluation of the juvenile Sanda athletes,providing intuitive and convenient application for the coaches in the selection of materials.