That big test is just around the corner. You’ve prepared with flash cards, extra reading and quizzes. But now researchers say a jaunt around the block or a quick game of pickup football should also be part of a successful studying regimen.

A new study from the University of Illinois at Urbana-Champagne says not only does exercise benefit kids physically, it also can help them stay mentally fit. The study found that kids who stay aerobically in shape strengthen their cognitive abilities compared with their more sedentary peers. Looking at brain scans, the researchers noticed that the white matter in the brains of more physically fit kids appeared different. They hypothesized that physical activity drives more blood flow to the brain, leaving the organ in better shape.

Other recent studies have also shown that being in shape lends itself to improved language skills and higher scores on standardized math and reading tests.

What’s interesting is that a little sweat seemed to boost brainpower for the short term, but researchers still don’t know its long-term effects.

Academics aren’t the only area of a kid’s life that can benefit from extra physical activity. Regular exercise can also work to improve kids’ moods. Team sports in particular have shown to combat depression and poor body image. As an added bonus, work-outs help teens sleep better, which all parents know makes for a happier, healthier kid.

Non-traditional exercise boasts benefits, too. Yoga amps up brain chemicals that soothe stress. Even something as simple and silly as an after-school dance party or kicking a ball around the backyard will yield advantages.

So next time your kid needs a break from studying for that big test, or simply is down in the dumps, try the age-old adage: “Go outside and play!”