Physical fitness refers to the ability to engage in daily physical activity (PA), without excessive fatigue, to respond to environmental demands, and to maintain and improve health. 1 Although previous cross-sectional and longitudinal studies 2,3 have reported that individual PA behaviors, for example, moderate-to-vigorous physical activity (MVPA), are positively associated with physical fitness in preschoolers, the composition of a 24-hour day comprises various co-dependent movement behaviors, such as, PA, sedentary behavior (SB), and sleep, that must be appropriately considered. Indeed, physical