When it is said whether absolutely long sleep narrows life, it may not necessarily go. For example, long sleepers needing a long sleep. It is translated as people of sleep for a long time. They feel a feeling of lack of sleep by all means when they do not take the long sleep by natural heredity.

In this case it is to watch out when I do not secure a long sleep properly because I rather injure health. On the contrary, there is calm people by the short sleep by natural heredity although short sleep narrows life most. It is the people of short sleepers translated as people of sleep for a short time. Because other people sleep as for the person of the short sleeper for seven hours, there cannot be the thing that I get impatient when oneself should sleep.

In this case you should secure that time by the sleep of 3-5 hours enough. It sleeps too long when you sleep for a long time forcibly, and it follows that rather you hurt health.