A new study puts the dumb jock stereotype to rest.
Researchers at Michigan State University have found that physically fit children perform better in school.
Published in the Journal of Sports Medicine and Physical Fitness, the study gathered data on 312 students in Grades 5 through 8 at a West Michigan school.
The researchers tested the kids' fitness with a program of push-ups, shuttle runs and other exercises.
They then compared those scores to the kids' school marks and performance on standardized tests.
The fittest kids got the highest marks, regardless of factors such as gender or puberty.
"Look, your fitter kids are the ones who will do better on tests, so that would argue against cutting physical activity from the school day," said co-author James Pivarnik, an MSU professor of kinesiology. "That's the exciting thing, is if we can get people to listen and have some impact on public policy."