Here is another research demonstrating that sleep problems may be contributing to the ADHD, and that the hyperactivity aspect of the disorder might be the brain’s way of compensating for not being able to doze off during school.
Can parents do anything to help their children with ADHD sleep better?
Pay attention to good “sleep hygiene,” or the rituals and habits kids engage in before bed. Parents need to tell children to turn off all electronics — including TVs, computers, cellphones and video games — a couple of hours before bedtime. These devices can keep kids stimulated and worsen sleep.
Here is the link to the article: https://consumer.healthday.com/sleep-disorder-information-33/misc-sleep-problems-news-626/adhd-tied-to-sleep-problems-711630.html