Analysis Of The Key Factors Of Physical Fitness Related To Inducing Acute Injury In China Agricultural University Rugby Players

【PURPOSE】The purpose of the study is to explore the association between physical fitness and the risk of sports injury in elite rugby players,to analysis the key factors of physical fitness related to inducing acute injury.we try to establish an equation,based on the key factors of physical fitness,to predict the probability of sports injury in rugby players.【METHODS】15 China Agricultural University rugby players underwent preseason measurements of height,weight,body composition,flexibility(sit-reach-test), speed(10- and 40-m sprint),power(vertical jump,wingate test),maximal aerobic power over one season.All injuries sustained by players were prospectively over one season.By Logistic regression analysis, the key factors of physical fitness related to inducing injury were screened,the regression coefficients are standardized and the contribution of the key factors is compared.By discriminant analysis,we establish an equation for prediction.【RESULTS】Flexibility(sit-reach-test),speed(10-m sprint), maximal aerobic power are different between the case and control in statistics(P<0.05). flexibility(sit-reach-test),speed(10-m sprint), maximal aerobic power are the key factors of physical fitness related to inducing injury in elite rugby players.The contribution of the key factors is ranked as follows: speed(10-m sprint)> maximal aerobic power> flexibility(sit-reach-test),the equation to predict the probability of sports injury in rugby players is y₀= - 0.547x₁+304.774x₂+1.812x₃ - 415.816 , y₁= -0.901x₁+329.760x₂+1.589x₃-460.731.The specificity is 100%.【CONCLUSIONS】Flexibility(sit-reach-test),speed(10-m sprint), maximal aerobic power are the key factors of physical fitness related to inducing injury in elite rugby players,we can calculate the probability of the risk of sports injury in elite rugby players by discriminant equation.