It appears there is indeed a link between short/long sleep and mortality. As you said, the possible causes are usually not reviewed. This concerns me as I do sl

It appears there is indeed a link between short/long sleep and mortality. As you said, the possible causes are usually not reviewed. This concerns me as I do sleep 9h+ on average. (But then again I do have an eye-illness that require a lot of concentration to overcome) > Conclusion: Both short and long duration of sleep are significant predictors of death in prospective population studies. > (...) > Future studies should be designed to answer the question whether sleep duration is a cause or simply a marker of ill-health. https://academic.oup.com/sleep/article/33/5/585/2454478?searchresult=1 https://academic.oup.com/sleep/article/33/5/585/2454478?sear... > Long sleep was significantly associated with mortality, incident diabetes mellitus, cardiovascular disease, stroke, coronary heart disease, and obesity. https://linkinghub.elsevier.com/retrieve/pii/S1087-0792(17)30027-8 https://linkinghub.elsevier.com/retrieve/pii/S1087-0792(17)3...