Improvements in self-concept associated with reductions in negative mood in preadolescents enrolled in an after-school physical activity program

Preadolescents enrolled in either a 3 times per week, 12-week exercise program (n = 50) or a no-exercise program control condition (n = 42) during their after-school care, were assessed for indication of whether exercise-induced changes in self-concept and overall negative mood were negatively correlated. Significant improvements in ratings of self-concept and of negative mood were found over 12 wk. Inverse relationships were found between changes in physical self-concept with overall self-concept and negative mood (r = -.40 and -.36, respectively). Results supported the positive effect of exercise on the assessed psychological factors in preadolescents. Cognitive behavioral theory-based explanations of the findings were discussed.