- The afterschool period holds promise for the promotion of physical activity, yet little is known about the importance of this period as children age.
- To date, no reviews have investigated the evidence of tracking of physical activity and sedentary behavior specifically during early childhood (aged 0–5.9 years) or from early childhood to middle childhood (aged 6–12 years). It is important to review the evidence of tracking of these behaviors to determine their stability during the foundational early years of life.
- Interest has increased in examining the physical activity levels of young people during school recess. Identifying correlates of their recess physical activity behaviors is timely, and would inform school-based physical activity programming and intervention development. The review examined the correlates of children's and adolescent's physical activity during school recess periods.
- Physical activity is important for children's health, and identifying factors associated with their physical activity is important for future interventions and public health programs.
- Parks are an important setting for leisure-time physical activity. Understanding how to attract residents to parks and encourage park users to be physically active is an important public health initiative. Natural experiments are a research priority for investigating whether changes to the physical environment affect physical activity; however, natural experiments involving parks have rarely been conducted.
- Opportunities for young people to be sedentary have increased during leisure time, study time, and transportation time.