From ancient times, physical exercise has been linked to good mental health and positive self-concepts. To investigate the effects of weight training on self-concept, 62 college males participated in a one semester (40 hours) weight training, physical education course. Subjects were pre- and post-tested on subscales of the Tennessee Self Concept Scale (TSCS), and were asked why they chose the weight training class. A control group (N=35) of males also completed the TSCS. An analysis of the results showed that prior to weight training, experimental students exhibited significantly lower self-concept scores than did the control group. After weight training, the students showed significant positive changes in self-satisfaction, physical self and personal self. Specifically, physical self-concept, was significantly increased after weight training. Follow-up interviews did not confirm the positive changes found on the TSCS. The findings from the study suggest that an exercise program stressing the components of muscular endurance and muscular strength increases self-concept. Finally, counselors working with students who manifest low self-concept might be aware that participation in such a physical exercise program might be a useful adjunct to talking through negative self-images. (BL)