A recent study performed by researchers at Cambridge University and the University of Warick from the United Kingdom, found that oversleeping increase the risk of a stroke. The results of the study were published in the journal Neurology.

The study showed that people who got more than eight hours of sleep a night had an increased risk of developing a stroke, when compared to people who slept 6 to 8 hours per night. It was also discovered that people who changed their sleeping habits from less than 6 hours of sleep per night to 8 hours quadruple their risk of developing a stroke later on in life.

The scientists haven’t really managed to translate the results of the study and explain why oversleeping increases the risk of a stroke.

The researchers used data from a previous cancer study, the European Prospective Investigation of Cancer which was conducted over a decade. The study collected information from 9,500 Brits with ages between 40 and 79, about eating habits, stress levels and sleep patterns and habits, among other things.

The scientists who analyzed the data also took into account other factors that could have influenced the outcome, such as body mass index (BMI), family history, cardiovascular disease, age and smoking.

Researchers found that 350 participants experienced a stroke during the 10 years of the study and 67 people died as a result of a stroke. After careful examination of the data, it was concluded that people who slept more than 8 hours a day had a much higher possibility of developing a stroke. It was also noticed that women who overslept were more predisposed at having a stroke than men were.

Yue Leng, doctoral candidate at the University of Cambridge, said that it is apparent from the data collected from the participants that there is a link between sleeping longer than 8 hours and an increased risk of stroke.

It was noted by the scientists study that more research is needed to validate the current results. The main reason is that the study does not prove causation, only correlation. Researchers concluded that oversleeping is also a sign of other health issues, such as neurological deterioration, depression and cancer.

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