 | All teens should make sure they get enough iron and calcium. The best sources of iron are lean red meats, grains that are iron-fortified, and green, leafy vegetables. For teens who play sports, calcium keeps the bones strong. |
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But eating too much fat is associated with heart disease, some cancers and other major problems, and probably means you don't get enough carbohydrates. How your body uses fat for energy depends upon the intensity and duration of exercise: When you rest or exercise at low to moderate intensity, fat is the primary fuel source. |
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To maintain your current level of fitness you should do aerobic exercise at least 3 times a week. Take a walk with a friend. How about the dog? Play tennis, work in the garden, hand wash the car, ride your bike to work, play Frisbee with your kids, take the stairs and not the elevator. |
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