Getting enough sleep is like we are charging for himself. If the battery or the battery will be less tired and parts of the body to slow down, especially our brain, which is the most important organ of the body. The body of the people should be fully sleep at least 7-8 hours if possible, try to go to bed before 4 pm to freshen up the body the next day and live longer too. Why do we need sleep for people who want a healthy body, intelligence and a good memory.