Building on self-determination theory, this study examined the relationships between self-determined motivation toward sport participation and developmental outcomes in sport-based positive youth development. One hundred twenty participants in a sport-based positive youth development program designed to engage youth through running completed a postprogram survey measuring their self-determined motivation toward running and achievement of developmental outcomes. The results of regression analyses indicated that participants with higher self-determined motivation toward running reported higher general self-efficacy, more positive attitudes toward a healthy lifestyle, and lower engagement in threatening behavior. On the other hand, self-determined motivation was unrelated to self-reported academic performance.
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