„With the omnipresence of screen-based devices in modern society, the majority of sedentary behaviour in children is now spent engaged with screens. Recent reports suggest that youth in the US spend an average of 7.5 hours per day engaged in screen-based activities.“
Dr. Jeremy J. Walsh u. a., Associations between 24-hour movement behaviours and global cognition in a cross-sectional sample of US children (2019), S. 2.