Circadian Rhythm

Your Household Rhythm at Age 2 Shapes How Your Child Sleeps at Age 10

A Dutch study following 5,443 children for nine years finds that irregular family routines in toddlerhood predict sleep problems all the way to age 10 — and that the regularity of family meals, not bedtime habits, did most of the work.

"Just Let Them Run Around Outside" — Same Minutes, Opposite Effects Depending on When

A six-month follow-up of 325 low-income preschoolers found that outdoor play in the midday window reduced negative emotional lability through better working memory — while morning and evening outdoor play did the opposite. When matters as much as how much.