New research has linked sleeping for more than eight hours a night with premature death.
Looking at data from 74 studies involving more than three million people, researchers found that people who slept for more than 10 hours a night were 30 percent more likely to die prematurely then those who slept for eight.
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Furthermore, being in bed for more than 10 hours increased the chance of death from a stroke to 56 percent and a 49 percent increase in the likelihood of cardiovascular related death.
Lead researcher Dr Chun Shing Kwok, of Keele University's Institute for Science and Technology in Medicine, told The Guardian that abnormal sleep marks an elevated cardiovascular risk.
"Greater consideration should be given in exploring both duration and sleep quality during patient consultations."
The study, published in the Journal of the American Heart Association, did face some limitations, as people with mental or physical conditions were more susceptible to extreme sleeping patterns.