With a studythatlookedatolderadults, researchersfoundthatsleepinglessthan 6 hoursormorethan 10 a nightwasassociatedwith a higherlikelihoodofhealthcareuse.
In a 2017 reviewarticlepublishedbytheOxfordUniversityPress, it's beenhypothesizedthathuman's naturalselectionforshortersleepcycleshascompromisedtheefficacyofthephysiologicalmechanismsthatprotectagainstAlzheimer's diseaseduringsleep.