Is sleeping 8hrs a night a health risk? I was always taught that sleeping 8 hours is ideal but research over the last 10 years shows that this may actually be a health risk.
There have been dozens of studies that followed millions of people over time and found that there is a U-shape relationship between death and sleep. Too much sleep and too little sleep are both linked to increased risk of mortality.
7 hrs is lowest health risk. Long sleepers and short sleepers have a higher health risk.
Let’s not be too precise with the numbers however as people are not very good at measuring exactly how long they sleep for because, well, there are asleep. Generally, it seems that people over estimate the amount of sleep they get.

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