Fact of the day

Sunday, 30 August 2026

Sleeppreliminary · human dataDiscovery of the day

Pooling 63 studies of healthy, non-clinical populations, sleep duration showed only a weak positive correlation with resilience (r = 0.11) while sleep quality showed a somewhat stronger one (r = 0.27); the correlation was slightly weaker in prospective studies (r = 0.18) and the authors found high publication bias for the sleep quality work.

Study design
Meta-analysis
Journal
Sleep Med Rev
Evidence
preliminary

What it shows: Worth some weight: results pooled from 63 studies in healthy people rather than one small trial. Most measured sleep and resilience at the same moment, so neither is shown to cause the other, and the authors flagged that positive results were probably over-represented.Meta-analysis · Sleep Med Rev

A systematic review and meta-analysis to assess the relationship between sleep duration/quality, mental toughness and resilience amongst healthy individuals. Sleep Med Rev 2022Read the study →

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