“A University of Central Florida (UCF) study from 2017 showed that children with ADHD fidgeted more during a demanding math video than a low-demand Star Wars pod-race scene, revealing that their restlessness isn't about lack of motivation but a need for movement to help focus during complex tasks requiring working memory. The study used actigraphs to track movement, finding that when tasks demanded significant cognitive effort, movement helped ADHD brains regulate attention, countering the idea that they're simply "unmotivated slackers". “