The confidence to get going: the moderating effects of depressive symptoms on the self-efficacy-activity relationship among youth and adolescents.

The purpose of this study was to examine whether the relationship between self-efficacy and physical activity was moderated by the presence of depressive symptoms in a sample of youth and adolescents. Participants (N = 688) from grades 7-12 completed measures of self-efficacy and depressive symptoms at baseline and self-report measures of physical activity 1 month later. Hierarchical regression analyses indicated a moderating effect of depressive symptoms on the self-efficacy-physical activity relationship, with this relationship being even more pronounced among those reporting depressive symptoms. These findings have important implications for the promotion of physical activity among youth and adolescents especially those suffering from depressive symptoms.

Youth and adolescent physical activity lapsers: examining self-efficacy as a mediator of the relationship between family social influence and physical activity.

The present study examined whether self-efficacy mediates the relationship between family social influence and physical activity among youth who have experienced a recent lapse in their physical activity participation. Using a prospective, longitudinal design, participants completed measures of social influence, self-regulatory efficacy and physical activity. Only those participants whose physical activity declined were retained for further analysis. Self-regulatory efficacy partially mediated the relationship between family social influence and physical activity, with self-efficacy mediating 36 percent of the total effect. The results provide support for self-regulatory efficacy as a mediator and provide preliminary insight into the potential mechanisms for preventing lapses in activity from developing into prolonged periods of inactivity within this population.