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Sleeping until the sun shines out of your behind and pulling light-nighters to meet a looming deadline are complete opposites. But they have one thing in common: they’re both bad for you.
Both insufficient and excessive sleeping are associated with an increased risk of cardiovascular disease and all-cause mortality, found a new study. The researchers suggest that you shouldn’t sleep for less than five hours a night, but that you get in at least eight hours of sleep a night. You should avoid sleeping for more than nine hours, as this is associated with higher all-cause and cardiovascular mortality, according to the researchers.
A similar study found a link between sleep duration and chronic disease. Compared to optimal sleepers, both short and long sleepers had a higher risk of obesity, frequent mental distress, coronary heart disease, stroke and diabetes.