Study says playtime might help school performance

FRESNO, Calif.

A new review in the Archives of Pediatrics and Adolescent Medicine found strong evidence linking better grades to physical activity.

Experts say exercise can increase blood and oxygen flow to the brain, reduce stress and improve mood.

Researchers say those factors lead to better behavior in the classroom. They say kids who participate in sports learn to obey rules.

This could make them more disciplined and better able to concentrate.

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