Conclusion 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
Background Many preschoolers spend a substantial portion of their day enrolled in centre-based childcare ; the amounts of physical activity and sedentary time accumulated in this environment are critical to preschoolers ’ ability to meet movement guidelines .
The purpose of this systematic review was to provide a comprehensive overview of the objective ly assessed physical activity  and  sedentary time  of preschoolers in centre-based childcare ( registration no. CRD42016033502 ) .
Child Care Center Characteristics Associated With Preschoolers' Physical Activity.
INTRODUCTION Despite children spending long hours in child care centers , it is unknown what center characteristics are associated with children 's  moderate to vigorous physical activity ( MVPA )  at the center and over the 24-hour day . METHODS Mixed model ANOVA evaluated associations between 23 center characteristics ( e.g. , policies , facilities , practice s , and staff training ) and  time in MVPA  , measured with accelerometers , at the child care center and over the 24-hour day among 388 preschoolers from 30 r and omly selected child care centers in Cincinnati , Ohio . Data collection occurred from November 2009 through January 2011 ; data analyses occurred in 2012 - 2014 . RESULTS Ninety percent of centers reported scheduling two or more outdoor sessions  daily , yet only 40 % of children had two or more outdoor sessions ; 32 % had no time outdoors . Eighty-three percent of centers reported scheduling ≥60 minutes outdoors  ; 28 % of children experienced this during observation . Children spent a mean ( SE ) of 2.0 ( 0.06 ) minutes/hour in MVPA . Children with ≥60 minutes outdoor time had 0.6 minutes/hour more MVPA in child care ( p=0.001 ) , and 0.5 minutes/hour over the 24-hour day ( p=0.001 ) than those who did not . Presence of an indoor play space , large outdoor playground , portable or fixed play equipment , staff PA training , weather and clothing policies , and TV/computer use were not related to children 's MVPA . CONCLUSIONS Outdoor time  occurred less frequently than scheduled . Children with ≥60 minutes of outdoor time at the center were more active than children without . Centers may increase preschoolers ' PA by adhering to the scheduled ≥60 minutes of outdoor time daily
Conclusion 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
Background Many preschoolers spend a substantial portion of their day enrolled in centre-based childcare ; the amounts of physical activity and sedentary time accumulated in this environment are critical to preschoolers ’ ability to meet movement guidelines .
The purpose of this systematic review was to provide a comprehensive overview of the objective ly assessed physical activity  and  sedentary time  of preschoolers in centre-based childcare ( registration no. CRD42016033502 ) .