The dangers of not getting enough sleep are widely known, but fewer people consider that sleeping too much may be—according to a growing body of research—also a risky endeavour.
For most adults, oversleeping counts as sleeping for longer than nine hours per night. (Somewhere between seven to nine hours is the recommended sweet spot).
Longer than that, and you may be at an increased risk for fatigue, lethargy, headaches, obesity, impaired immunity, impaired fertility, stroke, and general mortality, among other things.
If you think that sounds a lot like the problems typically associated with sleep deprivation, you’re right.