Chinese triathlon has always faced a single selection of materials,a small selection of materials,and a shortage of high-level reserve talents,which has l ed to a large gap in the level of competition of this sport compared to the tri athlon.This article takes the selection index of elite triathletes in China as the research object,and takes the national triathlon team as an example.The corr elation between the athletes' selection process,selection index,selection index a nd competition results,and the coaching ability of coaches analyze and conduct case studies of outstanding athletes,sum up valuable experiences,find existing problems and deficiencies,and put forward reasonable suggestions to contribut e to the development of triathlon sports in China.In this study,the literature selection method,expert interview method,field investigation method,test method and mathematical statistics method were use d to study and evaluate the selection system of athletes in the National Triathl on and Second Team.The research results are as follows:In conclusion:(1)The material selection model is feasible based on the current situation of talent training.Teenagers' basic training class of fitness project development i s crucial,triathlon enough reserve talented person in our country,the national s econd team triathlon teams through the "item" material selection and the dyna mic selection screen talented young athletes,and employ excellent foreign coac hes for scientific training,and to raising the triathlon competitive level in our country is of great significance.(2)The selection source is relatively single,lacking high-level athletes.The youth training operation mobilization is mainly from the swimming transfer,th e highest level of sport is the first level athletes,lack of elite level athletes,e specially in the middle and long distance running outstanding athletes.(3)The differences in body shape indexes of youth training operation and mobilization are small,and there are significant differences in some sports qu ality indexes.There was no significant difference in body shape between elite g roup and general group.There were significant differences between the excellent group and the general group in the number of continuous progressive load ru nning(5X1600m)and the steady pace running(2 X 2400m).The excellent gro up had significantly better running ability than the general group,but the cycli ng table and swimming were weaker than the general group.The women's excel lent group was better than the general group on the whole,but there was no s ignificant difference.(4)The correlation between the sports quality and the total competition re sults is small,and the ability to ride and run is very important.A single sports quality index can not predict the total score,but can be used as a prediction index for part of the sub-scores.In the winter training test competition,the ridi ng and running performance of male and female athletes is highly positively correlated with the total performance.In the competition with the world's high-le vel youth athletes,China's elite youth triathletes in cycling and running project s gap.(5)The coach team lacks running-in,and the local coach's teaching ability needs to be improved.The coach team is a temporary organization.The head coach has rich experience in triathlon,but his time with the team is limited.As sistant coaches have their own strengths in teaching individual events,but they have been teaching triathlon for a short time and lack experience in triathlon.To achieve ideal training results,it is necessary for the coach team to increas e the degree of tacit understanding and reach a high level of consensus in trai ning concepts,methods and means.Suggest:(1)Increase the publicity and popularity of triathlon,and continue to do a good job in "cross-item" material selection.By promoting the establishment of triathlon club,holding "little triathlete" competition and other forms,more teen agers can participate in triathlon,and attract elite athletes with talent for triathl on,such as middle-distance running and swimming,to participate in triathlon.(2)In the preliminary selection stage,body weight,BMI and percentage o f fast and slow muscle fiber can be used as body shape reference indexes,and the number of groups of continuous progressive load running(5X1600m)and steady pace running(2 X 2400m)can be used as important reference indexes t o select the athletic quality of male athletes.Female athletes should be examin ed for their comprehensive ability.(3)In the athletes' selection and selection stage,the riding and running ab ility should be emphasized.In the training,the emphasis should be placed on th e development of running and cycling skills of teenagers,and the training shou ld be focused on the coordination,flexibility and other physical qualities closel y related to the skills,so as to strengthen the basis of their aerobic capacity a nd improve the lactic acid threshold.(4)To increase the construction of the coach team.Can use "introduction" and "going out" method,through the selection of domestic excellent coaches w ith a foreign teacher learning and the excellent domestic coaches to take part i n international triathlon union annual coaches training,promote the local knowl edge updating of the coaches and coaching ability of ascension,in many aspec ts,such as training concept,methods,improve the comprehensive teaching level of the coaches. |