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short sleep
Also known as: short sleepers
Facts (14)
Sources
Improvement in sleep duration was associated with higher cognitive ... aging-us.com Oct 20, 2020 4 facts
claimFor short sleepers, a consistent change to moderate sleep duration is correlated with better cognition, while for long sleepers, there is no need to reduce sleep duration; however, excessive changes or deviation from a moderate sleep duration is associated with lower cognition.
claimHua et al. conclude that for short sleepers, improvement in sleep duration correlates with better cognition, while for long sleepers, there is no need to reduce sleep duration, and excessive changes or deviation from moderate sleep duration is associated with lower cognition.
measurementIn Wave 1 of the study, the mean age of moderate sleepers was 2.9 years younger than that of short sleepers and 1.6 years younger than that of long sleepers.
measurementAt baseline, 62.5% of the study participants were moderate sleepers (6-8 hours), 29.2% were short sleepers (less than 6 hours), and 8.2% were long sleepers (more than 8 hours).
Associations Between Sleep Duration and Cognitive Function ... humanfactors.jmir.org 3 facts
measurementThe mean episodic memory score for the total sample was 3.99 (SD 2.07), with the short sleep group scoring 3.97 (SD 2.08), the standard sleep group scoring 4.22 (SD 2.06), and the long sleep group scoring 3.13 (SD 2.19).
measurementThe mean mental intactness score for the total sample was 6.43 (SD 3.06), with the short sleep group scoring 6.35 (SD 3.06), the standard sleep group scoring 6.81 (SD 2.96), and the long sleep group scoring 5.27 (SD 3.14).
measurementThe mean cognitive function score for the total sample was 10.42 (SD 4.52), with the short sleep group scoring 10.32 (SD 4.52), the standard sleep group scoring 11.03 (SD 4.34), and the long sleep group scoring 8.40 (SD 4.67).
U shaped association between sleep duration and long ... nature.com by F Feng · 2025 3 facts
claimImpaired glymphatic clearance caused by short sleep accelerates the accumulation of neurotoxic proteins associated with Alzheimer’s disease and other dementias.
measurementThe study categorized sleep duration into three groups: short (< 6 hours/night), normal (6–8 hours/night), and long (> 8 hours/night).
claimThe China Health and Retirement Longitudinal Study (CHARLS) suggests that screening and brief counseling for short (< 6 h) and long (> 8 h) sleep, alongside promotion of sleep hygiene and assessment for treatable sleep disorders, may offer scalable strategies to support healthy cognitive aging.
Impact of sleep duration on executive function and brain structure nature.com Mar 3, 2022 3 facts
claimThere is a lack of consensus in scientific literature regarding the classification of 'short' and 'long' sleep durations, with thresholds ranging from less than five to eight hours for 'short' sleep and seven to 10 hours for 'long' sleep.
referencePrevious observational studies have used variable thresholds to define 'short' sleep (ranging from less than five to eight hours) and 'long' sleep (ranging from greater than seven to 10 hours).
referencePrevious studies using UK Biobank cognitive tests associated sleeping 10 hours or more (long sleep) and six hours or less (short sleep) with worse cognitive performance.
How much sleep do you really need? - Sleep Health Foundation sleephealthfoundation.org.au 1 fact
claimIndividual sleep needs vary among people, with some individuals being genuine short sleepers and others requiring considerably more than the average amount of sleep.