Factors affecting outdoor physical activity (OPA) in children and adolescents: A systematic review and meta-analysis.

This factor is classified as a perceived factor, and specifically, there may be significant differences between the degree of encouragement and support parents provide to children and the degree children perceive.),peer support, parental encouragement and support), peer support(weekends VS weekdays, children and adolescents often participate in OPA with their peers on weekends or after school, therefore, there may be some differences in the reports of whether the subjects engaged in OPA on weekends versus non-weekends.

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