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Richard R. Rosenkranz and David A. Dzewaltowski

Previous studies have demonstrated that parents may influence the physical activity (PA) levels of children. The present study sought to determine whether PA-related parenting behaviors were associated with the physical activity and relative weight of children, controlling for other covariates. A community sample of mothers (n = 193) of after-school-program attendees completed questionnaires assessing parental social support for PA, sedentary behavior, and moderate-to-vigorous physical activity. Children (N = 193, 51% girls) were objectively assessed for height and weight via stadiometer and digital scale, and the data were converted to body mass index (BMI) percentile via Centers for Disease Control and Prevention (CDC, 2010a) growth charts. Linear regression analysis revealed that maternal encouragement for child PA was positively related to both child PA and BMI percentile. However, mother-child shared physical activity was negatively related to child BMI percentile. Therefore, varying types of PA-related parenting behaviors may have differential relationships with child PA and relative weight.

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David A. Dzewaltowski and Richard R. Rosenkranz

Positive youth development (PYD) is an emerging area of study and practice that targets fostering the assets of young people to avoid problem behaviors and excel in meeting diverse life challenges. This paper describes how PYD evolved from treating problem behaviors to preventing problem behaviors in at-risk youth, to more recently helping all youth thrive and excel in numerous domains. Although evidence to inform community policy and practice has emerged, there is a lack of consensus on how to define PYD, and this lack of consensus has impacted progress in PYD physical activity behavioral science. This paper recommends PYD physical activity behavioral science reject disciplinary boundaries and (a) examine the nature of person-environment interaction in the context of physical activity as the primary outcome, (b) target big-picture physical activity outcome questions, and (c) come to a consensus on the domains of physical activity behavioral science research competencies.