A new study, published in the European Heart Journal, concluded that the risk of death from cardiovascular disease is higher in people who sleep more than six to eight hours a day. Those who regularly spend more than 10 hours a day are 41% more likely to suffer a heart attack or stroke.
Scientists, however, admit that there is no a reverse force ratio, because so far they have not determined whether excessive sleep is the cause of these diseases or if these pre-existing illnesses increase the need for sleep.
Also, the study shows that the increase in risk for people who are accustomed sleeping during the day, although there is enough sleep at night. The rest of the day in addition can be a consequence of fatigue associated with certain diseases that can cause illnesses over time.
The study involved more than 100,000 people aged between 35 and 70 from 21 different countries. Researchers follow their medical records for an average of 7.8 years.