A study stated that sleeping more than 9 hours a day or more raises the risk of strokes by 23%, at later ages, according to the British "Mirror" website.
The study also showed that taking a long nap during the day, exceeding the hour for 90 minutes at the age of sixty increases the risk of strokes by 25%.
The study involved 31,750,000 people in China, with an average life expectancy of 62 years.
The authors of the study said that they need to conduct broader research on the topic, but previous studies have confirmed similar results in relation to hours of sleep and naps.
The study showed that long hours of sleep devote to an unhealthy and inactive system, which changes the cholesterol level in the body, which is the most prominent factor in strokes.