In the United States today, we are starting to see more and more of a problem with children who are overweight. Doctors and even the President's wife are trying to do something about it. They recommend healthier foods and encourage children to get daily exercise. They recommend that children go outside and do things instead of sitting in front of the TV. They have suggested that children exercise at least an hour a day by jumping rope, cycling, or anything else that makes their heart beat faster. This kind of exercise is known as aerobic exercise. Something else they recommend is for children to do exercise that strengthens the bones and muscles. There are lots of ways children can do it. Running is one example.

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