Limiting children's screen time linked to better cognition, study says

Story highlights

  • The combination of sleep time, screen time and physical activity when considered together have the biggest impact on cognition
  • 30% of the children in the study met none of the recommendations for these three activities

(CNN)Limiting kids' recreational screen time to less than two hours a day, along with sufficient sleep and physical activity, is associated with improved cognition, according to a study published in The Lancet Child & Adolescent Health.

The study included about 4,500 US children ages 8 to 11 and measured their habits against the Canadian 24-Hour Movement Guidelines for Children and Youth. It found that 51% of the children got the recommended nine to 11 hours of uninterrupted sleep per night, 37% met the recreational screen time limit of two hours or less per day, while 18% met the physical activity recommendation of at least 60 minutes of accumulated physical activity a day.
Only 5% of the children in the study met all three recommendations; 30% met none at all.