Today, a lot of children are in favor of fast food, such as KFC. These fried food smells so good and makes them watering. As they eat rubbish food for a long time, it is easy to lose nutrition and get the problem of overweight. It is in need of improving our diet, for the purpose of keeping the good body shape and looking healthy and beautiful. The balanced diet is the first factor. We need to eat meat, vegetable and fruit. At the same time, taking exercise is also indispensable. Look at the beautiful models, they do gym to get the perfect body shape. In order to be fit, we need make efforts.