Testing the Youth Physical Activity Promotion Model (YPAP) in Brazilian Adolescents

This cross-sectional observational study aims to test the original conceptual diagram of the Youth Physical Activity Promotion Model (YPAP) in Brazilian adolescents. The study evaluates the relationships among predisposing, enabling, and reinforcing correlates described in the YPAP framework and investigates how these correlates interact with one another according to the pathways proposed by the model. A convenience sample of adolescents aged 10 to 13 years will be recruited through broad public dissemination as part of a larger experimental intervention project. Data will be collected at a single time point. Instead of traditional linear analytical strategies, the study will adopt complex, flexible, and non-linear methods such as network analysis to examine how correlates interconnect and influence physical activity behavior. Secondary analyses will explore whether the structure and strength of associations differ across demographic subgroups such as sex and socioeconomic level.

Inclusion Criteria: * age 10-13 years; * medical clearance for physical activity. Exclusion Criteria: * presence of any clinical diagnosis that may interfere the performance of assessments (including musculoskeletal, neurological, vascular, pulmonary, or cardiac disorders).