Within- and Between-Day Variability of Objectively Measured Physical Activity in Preschoolers

In this study, physical activity (PA) was objectively measured in 213 Belgian preschoolers (M(age) = 4.98, SD = .88 years) over 4 consecutive days including two weekend days. Within-day variability in PA showed a typical activity pattern during weekdays and weekend days. Weekdays clearly reflected a preschool attending day with more peaks and troughs than weekend days and after-school hours were characterized by a decrease in activity....