To sleep more than 8 hours a day is harmful to health

American scientists It proved that a seven-hour sleep is the most useful for human health. But sleeping more than 8 hours is harmful - it causes problems with the brain.

The duration of sleep

Scientists from the University Arizona in Phoenix once again proved how important it is to sleep at least 7 hours day. Modern hectic lifestyle does not allow many people to get these so necessary for their health hours of rest. However, researchers have found that too long sleep is harmful to health is almost as much as the lack of it.

The study authors We put a curious experiment that placed five volunteers living conditions, similar to the Stone Age. However, this did not apply to accommodation cave and hunt mammoths - just people took all hours, deprived them of electricity and tap water. Now they had to go to bed and wake up, when they want it. Then the results obtained were compared with their everyday the rhythm of life in the ordinary world.

It turned out that the "stone century "these people went to an average of two hours earlier to give for half an hour more sleep than usual. The total of sleep duration   7 was 2 hours. According to the authors study it and this figure is equivalent to healthy sleep. Herself Nature took care of that we slept 7 hours - no more and no less.

If sleep duration   grows, it adversely affects the brain as the researchers found. In particular, the reaction of a person slows down, problems with memory and decision-making. (READ MORE)

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