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Objectives. We examined the association between time spent in physical education and academic achievement in a longitudinal study of students in kindergarten through fifth grade.

Methods. We used data from the Early Childhood Longitudinal Study, Kindergarten Class of 1998 to 1999, which employed a multistage probability design to select a nationally representative sample of students in kindergarten (analytic sample = 5316). Time spent in physical education (minutes per week) was collected from classroom teachers, and academic achievement (mathematics and reading) was scored on an item response theory scale.

Results. A small but significant benefit for academic achievement in mathematics and reading was observed for girls enrolled in higher amounts (70–300 minutes per week) of physical education (referent: 0–35 minutes per week). Higher amounts of physical education were not positively or …