At age 10, kids should do 60 minutes or more of moderate-to-vigorous intensity activities each day. The best kind of workouts for this age group are aerobic: activities that get the heart pumping fast and exercise large muscle groups. Some kids this age may enjoy creating or joining an after-school running club. They should also do activities that strengthen their muscles or bones a few times a week. Jumping rope builds cardiovascular capacity and bone strength, and kids can do it anywhere.