Lack of sleep, and excessive sleep is harmful to the body.
Sleep affects blood pressure of a person, his glucose metabolism, condition of cardiovascular system. Lack of sleep or, conversely, excessive sleep can provoke inflammation and strokes, informs Rus.Media.
Korean scientists conducted a number of studies, which was attended by nearly 150 thousand people from 40 to 69 years.
The results showed that in day the person needs to sleep 8-9 hours straight. Excessive sleep, in turn, entails not only a headache but also obesity, increased blood sugar and cholesterol levels, arterial hypertension.
If you sleep at least 7 hours per day, increase the risk of cancer, as well as increased levels of copper in the blood.