Today, staying up all night has been acceptable life style in the world society. In fact, sleeping at night is important and needed by your body. Sleeping at night also can sharpen your brain power.

This statement is based on a research by Geneva University, Switzerland. The study shows that people who sleep at night have better ability to recall compared to people who sleep less. Indeed, this study still needs a further research, but Dr. Sophie Schwartz concludes that sleeping at night can strengthen the relationship between brain nerve cells that have a big role in learning and recalling process.

Based on the study, you should sleep earlier to stay away from staying up all night. This activity should be done to avoid you from the senility. However, do not sleep too much.

A research about the correlation between sleeping time and dead rate is done by the Institution of American Cancer Society who works together with UCSD. The study shows that people who usually sleep for more than 8 hours in a day lean to get a higher risk to die soon.

Professor Daniel F. Kripke, an American scientist who studies about sleeping behavior of human, states that sleeping for 6,5 hours per day is sufficient for you, so there is no reason for you to add your sleeping time.

Why is sleeping more than 8 hours per day better? Jim Horne, PhD from Loughborough University, England says that sleeping too much is same as eating too much and drinking too much. It is not good to give more than your body needs.

It is known that the normal sleeping time for human varies from 2 hours up to 12 hours per day. So, how much sleeping time you need for sleeping ideally? From the American research above, it can be concluded that sleeping for 7 hours per day is the best.

So far, it is approved that sleeping for 7 hours per day is very safe. Sleeping for 6 hours or 5 hours per day is also safe for you. You do not need to worry that you will get some problems because of the sleeping habit.

However, according to Donald Bliwise, PhD from Atlanta's Emory University, an expert in sleeping disorder topics, it is not good for you to sleep less than 5 hours per day continuously.

In conclusion, sleeping is an important phase in the correction of your body power to work. However, life is not only for sleeping even though sleeping is also an essential thing for human life. If you sleep more than your body needs so far, you should skip that habit.

You should sleep sufficiently and make sure you sleep for 7 hours per day from today. The change of this sleeping time is mainly for your better health. So, do not hold true anymore the statement that says 'the more you sleep, the better is'.