CONTEXT: Data are available on correlates of physical activity in children and adolescents,
less is known about the determinants of change. This review aims to systematically review …

Purpose Better knowledge on why some individuals succeed in maintaining participation in
physical activity throughout adolescence is needed to guide the development of effective …

Introduction Interventions to promote physical activity in children should be informed by
knowledge of the factors that influence physical activity behavior during critical …

BACKGROUND: A majority of youth do not attain the recommended levels of physical
activity. To develop interventions that will be more efficient at enabling healthy levels of …

Objective To identify factors associated with changes in physical activity in adolescent girls
at risk for sedentary lifestyles and obesity. Design A cohort study was performed with 201 …

PURPOSE: The objectives of this study were to describe longitudinal trends in adolescent
physical activity in a sample of US adolescents and to assess the effect of multiple …

This commentary provides a critical discussion of current research investigating the
correlates and determinants of physical activity in young people, with specific focus on …

BACKGROUND.: Physical activity (PA) is critical for children's normal growth and
development. The purpose of this study was to assess potential correlates of physical activity …

Background Research has shown that a clear decline in physical activity among girls
starting in early adolescence. Therefore, adolescent girls have been identified as a key …

Context Pre-adolescent girls are an important target population for physical activity
behaviour change as it may enhance tracking into the crucial period of adolescence. The …