Oversleeping is harmful to overall health and increases mortality risk

the verdict

SUPPORTED

the evidence backs this

Recorded sources

3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Multiple studies demonstrate that excessive sleep (oversleeping) is linked to adverse health outcomes, including increased mortality risk and higher prevalence of conditions like stroke.

The analysis

The retrieved literature consistently supports the claim that long or excessive sleep duration is associated with negative health outcomes and increased mortality risk, forming part of a U-shaped curve alongside insufficient sleep.

Evidence for · 3

Sleep Duration and Mortality in Women: Effect of Aging and Menopause.

Recorded source metadata

Ji M, Full KM, Laratta CR, Malhotra A. Sleep Duration and Mortality in Women: Effect of Aging and Menopause.. 2026. https://doi.org/10.1016/j.jsmc.2026.02.008

Highlights a U-shaped link between sleep duration and mortality, showing that excessive sleep is tied to higher death rates.

Source citation format

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More for · 2

Association of hemoglobin-to-red blood cell distribution width ratio (HRR) and sleep duration with stroke: A cross-sectional study from NHANES 2008-2018.

Recorded source metadata

Xue H, Zhao Y, Xu H, Si X, Song K, Jia M. Association of hemoglobin-to-red blood cell distribution width ratio (HRR) and sleep duration with stroke: A cross-sectional study from NHANES 2008-2018.. 2026. https://doi.org/10.1097/md.0000000000049243

Observes that long sleep durations are associated with a higher stroke prevalence.

Source citation format

Sleep Duration and Long-Term Mortality After Stroke: A Nationwide Analysis

Recorded source metadata

Sara Hassani, Bruce Ovbiagele, Daniela Markovic, Amytis Towfighi. Sleep Duration and Long-Term Mortality After Stroke: A Nationwide Analysis. 2023. https://doi.org/10.1101/2023.12.11.23299835

Finds that long sleep duration is independently associated with a higher risk of all-cause mortality after stroke.

Source citation format

The paper trail · every fact has a biography

first checked01 Aug 2026

judged → SUPPORTED · 7501 Aug 2026

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