Knowledge Tree
total sleep time
Also known as: TST, total sleep duration
Facts (14)
Sources
Sleep Across the Lifespan: A Neurobehavioral Perspective link.springer.com Feb 5, 2025 6 facts
claimOlder adults experience increased sleep fragmentation and difficulty maintaining sleep once asleep, which contributes to less total sleep.
claimSleep alterations in older adulthood include tendencies toward earlier sleep onset, reduced total sleep duration, struggles with sleep maintenance, and heightened sleep fragmentation.
claimMultiple studies indicate that subjective sleep quality and objective sleep metrics (such as Total Sleep Time, Sleep Onset Latency, and time in sleep stages) differ, suggesting that these metrics reflect different aspects of sleep.
measurementHealthy older adults experience an average reduction in Total Sleep Time (TST) of 8–12 minutes per decade, which reflects decreased sleep efficiency despite older adults spending more time in bed.
claimReduced parental supervision at bedtime in children and preadolescents is often observed to result in later sleep times and less total sleep duration.
claimThe reduction in Total Sleep Time (TST) in older adults is attributed to a compromised ability to generate sleep rather than reduced sleep need, resulting in increased Sleep Onset Latency (SOL), more Wake After Sleep Onset (WASO), and fewer successive NREM-REM cycles.
Extent and Health Consequences of Chronic Sleep Loss and ... - NCBI ncbi.nlm.nih.gov 4 facts
claimFollowing a stroke, an individual's sleep architecture is often altered, resulting in a decrease in total sleep time, REM sleep, and slow-wave sleep (SWS), as reported by Broughton and Baron (1978).
measurementIndividuals with delayed sleep phase syndrome typically have a normal total sleep time for their age, but find it difficult to initiate sleep before 2:00 a.m. to 6:00 a.m. and prefer to wake up between 10:00 a.m. and 1:00 p.m.
claimEpisodic breathing interruptions in sleep-disordered breathing cause cortical and brainstem arousals, which reduce sleep continuity, decrease total sleep time, and increase sympathetic nervous system activation.
claimIndividuals with delayed sleep phase syndrome have a total sleep time that is normal for their age.
Sleep Deprivation: What It Is, Symptoms, Treatment & Stages my.clevelandclinic.org Aug 11, 2022 2 facts
measurementStage 3 sleep is the deepest sleep stage, accounting for approximately 25% of total sleep time, with this percentage decreasing as a person ages.
measurementStage 2 sleep is a deeper sleep stage that accounts for approximately 45% of total sleep time, with this percentage increasing as a person ages.
Short- and long-term health consequences of sleep disruption dovepress.com May 19, 2017 1 fact
claimComparing the historical four-stage sleep classification system with the American Academy of Sleep Medicine's three-stage system shows only minor differences in total sleep time, sleep efficiency, and REM sleep, but the choice of system impacts the measurement of wake after sleep onset and the distribution of NREM sleep stages.
Associations Between Sleep Duration and Cognitive Function ... humanfactors.jmir.org 1 fact
referenceThe study titled 'Associations Between Total Sleep Duration and Cognitive Function Among Middle-Aged and Older Chinese Adults' investigated the relationship between total sleep duration, midday napping, and cognitive function using data from the 2015 China Health and Retirement Longitudinal Study (CHARLS).