How much sleep do we need
Introduction
It is a common view that everybody needs sleep everyday. Enough and high quality sleep contributes to the health of body. And being lack of sleep is harmful to the health and has bad impact on the habit of you. But there are few people really knowing that how much sleep do we need, and why do we need so much sleep. In this paper, our task is to answer these two questions in order to make our lives to be more health.
Executive summary