All living things need to take a rest after doing some activities, because those activities use living cell tissues, so there must be tissue damage. In this case, taking a rest can repair the damage.

During you sleep, your body changes the broken cells with the new ones and wastes excreta and dirty steam. In fact, sleeping is just needed not only by human and animals, but also by plants. At noon, you can see sunflower that opens its sepal and closes it at evening.

Related to sleeping, there is no a strict constancy because sleeping itself is based on the age, job, and temperament of each human. Babies and children need to sleep more than adult people. Old people also need more to take a rest. Meanwhile, people whose jobs using their brains also need to sleep more than people whose jobs using their physics.

Also, sick people need to sleep more than healthy people. For absolute measure, an adult person who is healthy and has a job using his brain should sleep for 7 hours per day.

Night is the best time for sleeping. It is not about a habit for people who work at noon, but scientifically, noon is more suitable for working, while night is for sleeping. If you do not do this habit, your condition will be unhealthy. Just see some night watchmen and actors who work at night. They must sleep at noon and as result, this habit influences their health.

Sleeping influences your body metabolism and stimulates assimilation power. That is why, if you sleep too much, your body will be unhealthy because your body assimilates excreta and dirty steam anymore. As a result, after sleeping, you do not feel fresh, but exhausted. In this case, it is suggested for you to organize the periods of your activities and your sleeping time to be shorter.

Recumbent sleeping is less healthy because sleeping with this position can press shoulder bones, even can cause you to go toilet frequently. Sleeping by lying flat on your stomach is also not good for your breath. If you sleep by resting on your left body, it can disturb your health. It is because of the fact that it can press your heart, so the blood circulation to your brain is disturbed.

If the blood circulation to your brain is disturbed, you will get a nightmare, even you can walk while sleeping (somnambulism). Scientifically, the best sleeping position is resting on your right body.

And, it is suggested for you not to sleep directly after having a dinner. Anyway, sleeping difficultly or sleeping with a bad quality can set teeth on edge. Therefore, it is important for you to sleep sufficiently at night.

There are some factors to help you sleep, such as cleaning your bed, taking a bath using warm water, drinking a glass of warm milk, listening to slow music, reading a book, turning off your lamp, and many more. Those factors can help you to get a healthy sleeping. So, in the following morning, you can wake up fit and well.