The purpose of this study is finding the approach method in exercise of physiology by measures of anaerobic power, lean body weight, flexibility, and velocity of pitching for baseball athletes. The results are followings: 1. There is no significant difference for two groups between anaerobic power(AP) and lean body weight of mean and standard deviation. 2. There is no significant difference for two groups among lean body weight, flexibility, and velocity of pitching (VP). 3. There is only significant relationship between anaerobic power and velocity of pitching(r=0.561). 4. The regression formula for velocity of pitching as dependant variable is following: Y(VP0=99.45627+0.02716 (AP) The result of this study indicates that anaerobic training is main effect of increasing velocity of pitching. Therefore, anaerobic power is considered important factor planning the training program.