University of Toronto Jun 20 2025 Good sleep is vital for adolescents' physical health, mental well-being, and academic success - yet many don't get enough rest. Now, a new study reveals bedtime screen habits may be to blame. Published in Sleep Health , the study provides new insights into tweens' bedtime screen use, as well as its associations with sleep disturbance and duration. Researchers found that over 70% of tweens had an Internet-connected device in their bedroom, with nearly 25%