The purpose of this study was to investigate the effects of Weight training and Circuit Weight training on the muscle strength and physical work capacity. 16 physical education students at K University were selected as subjects and then. divided into two groups: the Weight training group with 8 students, the Circuit Weight training group with 8 students. Training was performed three times a week for the period of 8 weeks. The results were as follows; 1. In the improvement of arm strength, leg strength, grip strength, and back strength, there is a significant difference between pre-test and post-test in both group. 2. On the rest heart rate, there is very decreased in Weight training group(p<0.05) and Circuit weight training group(p<0.05). 3. In the improvement of All-out time and P.W.C_(170), there is significant difference between pre-test and post-test in Weight group(p<0.01 &p<0.02) and Circuit weight training group(p<0.001 & p<0.01).