Evaluation of a Two-Year Middle-School Physical Education Intervention: M-SPAN

School physical education (PE) is highly recommended as a means of promoting physical activity, and randomized studies of health-related PE interventions in middle schools have not been reported. We developed, implemented, and assessed an intervention to increase physical activity during middle-school PE classes.Twenty-four middle schools (approximately 25,000 students, 45% nonwhite) in Southern California participated in a randomized trial....