Effects of school-based before-school physical activity programmes on children's physical activity levels, health and learning-related outcomes: a systematic review.

Objective: To review and evaluate the impact of school-based, before-school physical activity (PA) programmes on children's PA levels, health and learning-related outcomes.

Design: Systematic review.

Data Sources: PubMed, PsycINFO, Scopus, Embase and ERIC were searched in January 2021.

Eligibility Criteria For Selecting Studies: (1) Original research published in English, (2) sample included typically developing school-age children and/or adolescents, (3) examined school-based PA programmes delivered before school, (4) included a comparator and (5) reported associations with PA, physical health, learning-related and/or psychosocial outcomes. Studies examining before-school active transport or sport were excluded.

Results: Thirteen articles representing 10 studies were included (published 2012-2020); seven conducted in primary schools. Programmes ranged between 3 weeks and 6 months, primarily operating daily and for 25-40 min. One study examined a programme informed by theory; six incorporated fidelity measures. Data synthesis, considering consistency of findings, showed indeterminate associations for the domains of physical health, learning-related and psychosocial outcomes. Among subdomains, synthesis showed positive associations with before-school and daily PA, cardiorespiratory and muscular fitness, readiness to learn and an inverse association with adiposity. Risk of bias was high/serious or insufficiently detailed across studies and outcome domains, except PA, which included moderate-risk studies.

Conclusion: There is limited available evidence on school-based, before-school PA programmes, with some positive associations at domain and subdomain levels. Continued research is justified to understand the role of before-school programmes for facilitating PA. Future research should follow recommended practice for intervention design and process evaluation, and address under-represented contexts, including secondary schools.

Prospero Registration Number: CRD42020181108.