A lot of sleep is bad for the heart.

As you know, lack of sleep is a health hazard and can cause a number of diseases, including obesity and heart disease. But now a team of scientists from the Norwegian University of Science and Technology warns that too much sleep can also be dangerous to the heart.

Sleep less than 4 hours is considered harmful to the health of the human cardiovascular system. Lack of sleep can increase the heart rate, blood pressure and the secretion of the hormone adrenaline - all these factors are risk factors for the development of cardiovascular diseases. However, a new study showed that people who sleep more than 8 hours a day also face a higher risk of heart disease.

In the course of the study, experts examined 392,164 adults, and over a 13-year period, 711 people died of cardiovascular disease.

It was found that the risk of developing cardiovascular disease was higher by 50% for those who slept less than 4 hours per day, compared to participants who slept from 4 to 8 hours.

However, people who slept more than 8 hours a day had a 28% higher risk of developing heart disease. This risk was higher in women than in men. So far, scientists can not say exactly why excess sleep increases the likelihood of heart disease.

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