Organized Physical Activity Program Participation, Physical Activity, and Related Psychosocial Factors Among Urban Adolescents.

The study purpose was to examine whether adolescents who participated in organized physical activity (PA) programs differed from nonparticipants in motivation, social support, and self-efficacy related to PA; PA (min/hr); and sedentary screen time behavior. Thirty-nine 5th-7th grade adolescents participated in organized PA programs; 41 did not. Approximately 56.3% were Black, and 52.5% had annual family incomes <$20,000. Compared to nonparticipants, those who participated reported significantly higher social support (M = 2.32 vs. 3.13, p < .001) and fewer hours watching television or movies on a usual weekend day (M = 2.49 vs. 1.59, p = .016); and had higher accelerometer-measured vigorous PA (M = 0.58 vs. 1.04, p = .009) and moderate-to-vigorous PA (M = 2.48 vs. 3.45, p = .035). Involving adolescents in organized PA programs may be important for improving their moderate-to-vigorous PA, vigorous PA, and related psychosocial factors, as well as reducing sedentary screen time behavior.