BBC reports "Activities that maintain cardio fitness - such as running, swimming and cycling - led to better thinking skills and memory 20 years on" ... "even after adjusting for factors such as smoking, diabetes and high cholesterol."The article goes on to say, "People who had smaller time differences in their treadmill test 20 years later were more likely to perform better on the executive function test than those who had bigger differences."Exercise has many benefits, and one I've seen over and over again with my ADHD patients is how exercise can help reduce restlessness and improve concentration and focus. Some find that the time exercising is made up for by the improved productivity during the rest of the day.http://www.bbc.com/news/health-26841988