Research
Hormonal
Sleeping more than 9 hours per day is associated with an increased risk of stroke, potentially due to poor sleep quality or underlying comorbidities.
If you consistently sleep more than 9 hours, consider consulting a doctor to rule out underlying issues like sleep apnea or inflammation, as this pattern is linked to a higher risk of stroke.
GoodSupportsMEDIUM confidence
Concerning long sleep duration, no effect was observed for the risk of chronic diseases in general, but it was shown to be associated with an increased risk of stroke (model 4: HR for $9 h/ day = 1.65, 95% CI: 1.00–2.73).
Why this rating
Large cohort, but the association is specific to one endpoint (stroke) and the confidence interval touches 1.00.
Source
Association of Sleep Duration with Chronic Diseases in the European Prospective Investigation into Cancer and Nutrition (EPIC)-Potsdam Study
Anne von Ruesten et al. · PLoS ONE · 2012
DOI 10.1371/journal.pone.0030972
cohort · n=23620Cited 260×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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