Aaron Hartman, MDFunctional Medicine Specialist | Clinical Researcher

The Hidden Risk of Not Getting Enough Sleep | The Real Reason You’re Not Sleeping

8 Jul 2025 · 1 min

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YouTube video (Aaron Hartman, MD) discussing how sleep duration relates to all-cause mortality. The speaker identifies an optimal sleep duration around 7.5 hours and warns that mortality risk increases below roughly 6–7 hours and above roughly 9–10 hours, suggesting long sleep may indicate underlying illness.

Questions this video answers

About 7.5 hours ("seven and a half plus or minus spot" as stated).

Below roughly 6–7 hours (inflection around 6 hours between 6 and 7) and above roughly 9–10 hours.

The inflection points are 6 hours of sleep at night between 6 and 7, and then 9 to 10. So optimal longevity all cause mortality we talked about before, you know, dying for any reason whatsoever. The lowest all cause mortality is that seven and a half plus or minus spot. Once you start going down to that six or seven, that's when you start seeing the all cause mortality like skyrocket up. When you get involved nine or ten, you start to see it skyrocket up. So when people sleep like long periods of time, there's a concern of there's something underlying that's increasing your risk for dying for under cause.