Abstract
PURPOSE: This study investigated the association between physical activity (PA) and Theory of Planned Behavior (TPB, Ajzen,1991)-based variables among children and adolescents. METHODS: We evaluated the association between PA and TPB-based variables (intention, attitude, subjective norms, and perceived behavioral control / self-efficacy to engage in PA) among children and adolescents, and the moderation effects of geographical region of study between PA and TPB-based variables. A total of 36 articles met the inclusion criteria and were meta-analyzed. RESULTS: Intention significantly correlated with and had a medium effect on PA in children. TPB displayed a good fit in path analysis. Moderator analyses showed that subjective norms and perceived behavioral control / self-efficacy had a larger effect on children in the rest of the world, compared to their North American counterparts. CONCLUSIONS: The results provide a summary of current scientific findings about the association between TPB-based variables and PA in children and adolescents, and support TPB as a feasible conceptual framework to study psychosocial factors that underpin PA.
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