|（Shanghai Research Institute of Sports Science，Shanghai 200030，China）
Abstract: Basing their research subject on second string athletes in Shanghai, the authors probed into the relations between physical components and sports capacities of athletes of different events, hoping to provide a scientific cri-terion for athlete selection and sports training in the future. The authors performed physical component and aerobic and anaerobic capacity tests on 117 second string athletes (60 males and 57 females) of such three events as sprint-ing, bicycle racing and fencing, and revealed the following findings: basically there is a medium or high degree cor-relation between the body weight, muscle, protein and anaerobic capacity index of male and female athletes of the three events; there is a low degree correlation between the athlete’s total muscle and protein weight, body weight, and blood lactic acid; there is a low degree negative correlation between the body fat and anaerobic capacity related indexes of the athletes of the three events. The said findings indicate that various physical components have a close relation with physical capacities; however, since different events have different characteristics, their correlations are significantly different.
Key words: sports physiology；physical component；sports capacity