Systematic review of physical activity and health in the early years (aged 0–4 years)

The early years represent a critical period for promoting physical activity. However, the amount of physical activity needed for healthy growth and development is not clear. Using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) framework, we aimed to present the best available evidence to determine the relationship between physical activity and measures of adiposity, bone and skeletal health, motor skill development, psychosocial health, cognitive development, and cardiometabolic health indicators in infants (1 month - 1 year), toddlers (1.1-3.0 years), and preschoolers (3.1-4.9 years). Online databases, personal libraries, and government documents were searched for relevant…