Health is the general state of a person's mind and body. A person in good health is ready to work and to play with energy and enthusiasm. A healthy body is the best starting point for general well-being. Every growing person should follow four rules to keep his or het body in good health. The first rule is to eat balance diet of foods that help the body do its work and grow. The second rule is to get enough sleep. A growing person needs eight to ten hours of sleep each night. The third rule is to stay clean. Cleaning the skin and hair removes germs that can cause in fections. And, finally, a healthy body needs exercises.