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OBJECTIVE: To compare the physical activity levels of overweight and non overweight 3-to 5-y-old children while attending preschool. A secondary aim was to evaluate weight-related differences in hypothesized parental determinants of child physical activity behavior.

DESIGN: Cross-sectional study.

SUBJECTS: A total of 245, 3-to 5-y-olds (127 girls, 118 boys) and their parent (s)(242 mothers, 173 fathers) recruited from nine preschools. Overweight status determined using the age-and sex-specific 85th percentile for body mass index (BMI) from CDC Growth Charts.

MEASUREMENTS: Physical activity during the preschool day was assessed on multiple days via two independent objective measures—direct observation using the observation system for recording activity in preschools (OSRAP) and real-time accelerometry using the MTI/CSA 7164 accelerometer. Parents completed a take-home survey assessing …