Declining levels of physical activity probably contribute to the increasing prevalence of
overweight in US youth. In this study, the authors examined cross-sectional and longitudinal …

Objective To investigate associations of underweight and overweight with physical activity
among high school students in the United States. Methods A nationally representative …

Objective To test for differences in prospective associations between physical activity and
obesity among black and white adolescent girls. Design Prospective cohort study using data …

Purpose Findings from prospective studies on associations between physical activity and
adiposity among youth are inconsistent. Our aim was to describe physical activity trajectories …

Purpose To examine whether components of body composition (size, fat mass, and fat-free
mass) were related to physical activity. Methods A random sample of 60 eligible sixth grade …

Context Decreased physical activity plays a critical role in the increase in childhood obesity.
Although at least 60 minutes per day of moderate-to-vigorous physical activity (MVPA) is …

Objective To examine the relationship between increased physical activity in adolescence
and adult weight status. Design Cohort study based on data from the National Longitudinal …

Objective: Our objective was to determine the association between physical activity and BMI
among racially diverse low‐income preschoolers. Research Methods and Procedures: This …

Objectives. We examined the effect of physical education instruction time on body mass
index (BMI) change in elementary school. Methods. We examined data from a national …

OBJECTIVE: To evaluate the association between objectively measured daily physical
activity and body fat. STUDY DESIGN: Cross-sectional, observational, study of 248 children …