The U.S. Centers for Disease Control and Prevention recommend that children and adolescents get 60 minutes or more of physical activity each day. The CDC advises that such physical activity should include aerobic activity and muscle and bone strengthening exercises. Aerobic activity should take up most of kids’ daily physical activities and can include moderate activities, such as brisk walking, or more intense activities like running. Parents should make sure kids include some vigorous aerobic activity in their physical activity routines at least three days per week. Muscle strengthening activities do not mean parents should get their youngsters in the gym as soon as possible. Rather, activities like gymnastics or push-ups done three times per week can be enough to help kids build strong muscles. The CDC notes that as kids reach adolescence, they may start structured weight-training programs to strengthen their muscles. Jumping rope or running three times per week can serve as kids’ bone-strengthening exercises.