Abstract
This study was conducted to determine the effect of a weight-training program on the self-concepts of 105 college males and whether or not success in the lifting program affected self-concepts. Subjects were randomly selected by a duster-sampling strategy, divided by self-selection into an experimental and a control group, and assessed on the Tennessee Self-concept Scale. The weight-training program required two intense 50-min. total-body workouts per week for 16 wk. Significant differences between groups were found on five of the nine self-concept measures including the Total Positive score; this supported the hypothesis that regular weight-training positively influences self-concept. The experimental group also showed significant improvement from pre- to posttest on eight of the nine self-concept indices, yet control subjects displayed no significant changes on any of the measures. Level of success in the lifting program was not determined to be a significant moderator variable.

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