RT Journal
A1 Copeland KA, Sherman SN, Khoury JC, Foster KE, Saelens BE, Kalkwarf HJ
T1 WIde variability in physical activity environments and weather-related outdoor play policies in child care centers within a single county of ohio
JF Archives of Pediatrics & Adolescent Medicine
JO Archives of Pediatrics & Adolescent Medicine
YR 2011
FD May 1
VO 165
IS 5
SP 435
OP 442
DO 10.1001/archpediatrics.2010.267
UL http://dx.doi.org/10.1001/archpediatrics.2010.267
AB 
For preschool-aged children, daily physical activity is essential for obesity prevention and for learning age-appropriate gross motor, fine motor, cognitive, and social-emotional skills.1- 7 More than half of US children aged 3 to 6 years are in child care centers,8 and many spend long hours there.9 Unfortunately, in these settings, children are sedentary 70% to 83% of the time (excluding nap), and most are not getting adequate amounts of physical activity,10- 12 perhaps contributing to the increasing rates of obesity among US children.13- 16