Sport participation, physical activity and sedentary behavior in the transition from middle school to high school

Objectives To examine associations between sport participation, and objectively assessed physical activity and sedentary behavior in youth during the transition from middle school to high school. Design Longitudinal study with 2-year follow-up. Methods Sport participation and accelerometer-measured physical activity and sedentary behavior were assessed in 306 children (122 males, 184 females) when they were in 7th and 9th grades (mean age of...