This study examined direct and moderated connections among aerobic fitness, objectively measured sedentary to light physical activity (SLPA), moderate to vigorous physical activity (MVPA), and executive function (EF) during pre-kindergarten. Children (n = 81) between the ages of 3 and 5 were recruited from 17 classrooms from 7 center-based pre-kindergartens. In the fall (T1) and spring (T2), children were assessed using the Head-Toes-Knees-Shoulders (HTKS) and Day-Night Stroop, and physical activity (PA) was measured at T1 over 4 days during waking hours within each pre-kindergarten. (author abstract)