WHO did not specifically detail the potential harm caused by too much screen time, but said the guidelines which also included recommendations for physical activity and sleep were needed to address the increasing amount of sedentary behavior in the general population. It noted that physical inactivity is a leading risk factor for death and a contributor to the rise in obesity.
The agency said infants less than 1 year should spend at least half an hour every day on their stomachs and that older kids should get at least three hours of physical activity every day.