Children with Attention Deficit Hyperactivity Disorder (ADHD) concentrate better after a walk in a city park than after walks in other urban settings.
Taylor, Andrea Faber, and Frances E. Kuo. “Children With Attention Deficits Concentrate Better After Walk in the Park.” Journal of Attention Disorders 12, no. 5 (2009): 402–9. https://doi.org/10.1177/1087054708323000.