Kids and Teens (age 6 to 17): As they get older, healthy kids require slightly more vigorous exercise. An hour each day is ideal, and they should get some mix of aerobic, muscle-strengthening, and bone-strengthening exercise. You probably have a good sense of what counts as aerobic—something that gets your heart rate up and keeps it there. But guess what? Household chores like mowing the lawn, raking leaves, or even cleaning the bathroom counts as moderate activity too. Muscle-strengthening exercises could be the stereotypical weight training, but you could also work with a resistance band or simply your body weight. Building your bones requires impact or resistance. Jumping rope is one example, but any sport where you have to rapidly change direction (think tennis or basketball) works too, as do running and weightlifting. Take your pick, just get some variety.