People who sleep nine or more hours per night are 23 percent more likely to later have a stroke than people who sleep seven to less than eight hours per night, warns a new study. The results revealed that long naps are also not good for your health.

People who took a regular midday nap lasting more than 90 minutes were 25 percent more likely to later have a stroke than people who took a regular nap lasting from one to 30 minutes, said the study published online in Neurology, the medical journal of the American Academy of Neurology.