OLYMPIC-S is a cluster randomized controlled trial evaluating a four-month school-based intervention designed to increase moderate-to-vigorous physical activity and promote healthy habits among children in the fourth, fifth and sixth grades of primary school. Fifteen schools and approximately 1,200 children will participate. Schools will be randomized to the Olympic School intervention or to a control group continuing usual school activities.
Intervention schools will introduce 15 minutes of physical activity during each school day. Teachers may choose between outdoor walking or running activities based on The Daily Mile or structured movement video sessions from the Born to Move programme. A gamified web platform will record the activity performed, display each school's collective progress through an Olympic journey, unlock educational content and reinforce messages related to physical activity, healthy eating, hydration and sleep.
Outcomes will be assessed at baseline and immediately after the four-month intervention. The primary outcome is daily moderate-to-vigorous physical activity measured using the PAU-7S questionnaire. Secondary outcomes include dietary habits, fruit and water consumption, sleep, emotional well-being, health-related quality of life, adherence, platform use, feasibility and acceptability. Post-intervention focus groups with children and teachers will complement the quantitative evaluation.
The intervention content is intended for approximately 8-12-year-old children, but the actual lower and upper age limits should be based on the expected ages of pupils in the participating fourth-, fifth- and sixth-grade classes.
Inclusion Criteria:
Exclusion Criteria:
Teacher focus-group eligibility:
Inclusion criteria:
Exclusion criteria:
Schools allocated to the experimental group will implement the Olympic School programme for four months. On each school day, participating classes will undertake 15 minutes of teacher-led physical activity. Teachers may choose between outdoor walking or running based on The Daily Mile principles or structured movement video sessions from Born to Move programme. The activity will be supported by a gamified web platform that records activity minutes, displays collective progress through an Olympic journey, unlocks cities and educational materials, and presents brief health messages concerning physical activity, fruit consumption, hydration and sleep. Schools will also receive a physical progress poster and symbolic recognition will be provided at the end of the programme.
Schools allocated to the control group will continue their usual educational and physical activity practices. They will not have access to the Olympic School web platform during the four-month study period.
Barcelona, Barcelona 08007, Spain
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