As temperatures climb, preschoolers become less physically active

“Go outside and play” is the time-tested strategy for generations of parents and caregivers ready to see their little ones tuckered out by exercise. But the strategy may be losing some of its impact as more children face more hot days, according to new research from The University of Texas at Austin. A team found that, as the weather gets hotter, preschool-aged children become more sedentary.