News reports about a study presented at a sleep conference suggest that the window for a healthy amount of sleep may be pretty small--and that leaning too far outside that window can be dangerous. This may be true--or not. Let's take a careful look.
Bottom line first
Changing from getting around 7 hours of sleep to less than 5 hours or more than 8 hours of sleep per night can increase risk of death. Consistently maintaining about 7 hours daily appears to be ideal.
This study in 50 words or...


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