The number of hours of sleep that are considered necessary varies according to age primarily, since a newborn or infant can sleep up to 17 hours a day, and this is understandable, since they need that time for all the energy of the body is devoted to the formation of muscle, bones, nervous system, and the rest of the systems. That's why at that age practically all they do is sleep, eat and evacuate.

If you are curious and want to know why we need to sleep, read on.

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As we grow, the number of hours of sleep needed decreases, until we reach adolescence the average needed is 8 to 10 hours, and in adults from 6 to 9 hours. 7 being the average.

Perhaps the next question arises:

If children need so many hours of sleep in order to grow, what adult needs sleep for?

The reason we need to sleep has been the subject of scientific study for a long time, for most people the main reason we sleep is because we need to rest, it is partly true, but there seems to be an answer beyond that.

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Scientific research has shown that neurons, cells that make up the nervous system, decrease up to 50% in size while we sleep, this allows the cerebrospinal fluid that circulates throughout the system to make a kind of sweep and take metabolic waste that have accumulated over the course of the day, serving this as a brain cleaning mechanism, so that it works better at the time of awakening and in the course of the day.

For now this is one of the most valid hypotheses, I wanted to share it with those who read me. Well, it is something that every human being needs to do, and they do it out of inertia, most of them probably without asking themselves why.

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