Excessive sleep duration causes long-term damage to brain and heart health.
the verdict
SUPPORTED
the evidence backs this
confidence 77/100
Multiple studies and meta-analyses demonstrate that excessive or long sleep duration is significantly associated with increased cardiovascular disease mortality and adverse long-term health outcomes.
Evidence for · 3
Association between sleep duration and cardiovascular disease specific mortality: A meta-analysis
2022 · cited by 1
A meta-analysis found that long sleep duration is significantly associated with an increased risk of cardiovascular disease-specific mortality.
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More for · 2
Sleep Duration and Mortality in Women: Effect of Aging and Menopause.
2026 · cited by 0
Review evidence indicates that excessive sleep duration follows a U-shaped risk curve, being tied to higher death rates and cardiometabolic strain.
Sleep Duration and Long-Term Mortality After Stroke: A Nationwide Analysis
2023 · cited by 0
A nationwide study of stroke survivors established that long sleep duration is independently associated with higher all-cause mortality.