Physical activity and sedentary time among preschoolers in centre-based childcare: a systematic review.

Physical activity and sedentary time were highly varied and inconsistent between studies; therefore, it is difficult to determine preschoolers' true amount of physical activity and sedentary time during childcare hours. Despite this variability, preschoolers were noted to participate in high rates of sedentary time in this setting. The lack of homogeneity is an important finding in and of itself as it highlights the lack of consistency in measuring, processing, and reporting paediatric physical activity data.