Janice M Johnston, C Mary Schooling, Gabriel M Leung
A randomised-controlled trial of two educational modes for undergraduate evidence-based medicine learning in Asia
BMC medical education
recess strategies increase childrens physical activity contribute daily 60 minutes moderate vigorous physical activity mvpa recommended cluster randomized trial conducted examine effect supervised versus organized recess childrens participation physical activity play social behavior supervised recess children free play physical education pe teachers ensured safety organized recess pe teachers provided challenging tasks data collected using systematic observation children n 281 810 14 schools received 6day parkour unit pe three opportunities participate 20minute parkour recess schools randomized supervised organized parkour recess condition majority children participated parkour recess range 5685 boys participating 3 organized versus supervised recess sessions 57 vs 35 p 01 boys spent time mvpa organized recess 79 vs 71 p 02 boys girls spent time activity games organized recess 59 vs 46 p 01 59 vs 47 p 001 organized recess attracted children made largest contribution daily mvpa