Initiative Description: the intervention school increased the school curriculum of PA from 60 minutes/week to 40 minutes/school day while the control schools continued with 60 minutes/week for three years.

Study Results: enhanced muscle strength in both girls and boys.

Reference: Detter, F., Nilsson, J. A., Karlsson, C., Dencker, M., Rosengren, B. E., Karlsson, M. K., & Paediatrics, P. (2014). A 3-year school-based exercise intervention improves muscle strength – a prospective controlled population-based study in 223 children. BMC Musculoskeletal Disorders, 15(1), 353

Level of Evidence: Good