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Table 1 Intervention content and means of implementation stratified by intervention group.

From: Effects of a school-based physical activity intervention on academic performance in 14-year old adolescents: a cluster randomized controlled trial – the School in Motion study

Intervention components (min) Practical organization Providers of interventions Implementation facilitation and method
Physically Active Learning (PAL)
Physical activity in academic subjects (30 min) Weekly Teachers An external collaborator provided a program tailored specifically to the subject curriculum.
Teachers attended two courses during the intervention period.
Physical education (60 min) Weekly Physical education teachers Follows the normal physical education curriculum
Physical activity (30 min) Weekly Teachers/physical education teachers Students could choose between varied activities. Teachers were encouraged to motivate students during physical activity to stimulate their positive feelings and attitudes towards physical activity
Don’t Worry – Be Happy (DWBH)
Activity class (Be happy class) (60 min) Weekly Teachers/physical education teachers Self-organized activity developed according to the adolescent’s activity preferences.
Physical education (Don’t worry class) (60 min) Weekly Teachers/physical education teachers Pupils led the regular PE class. Pupils practiced their Be Happy activity.