Knowledge Tree
sleep timing
Also known as: sleep-wake timings
Facts (18)
Sources
Sleep Across the Lifespan: A Neurobehavioral Perspective link.springer.com Feb 5, 2025 7 facts
claimAge-related reductions in sleep homeostasis, resulting in decreased accumulation of sleep pressure, contribute to shifts in sleep timing.
claimThe earlier shift in sleep timing can contribute to irregular sleep schedules in older adults, such as unintentionally dozing off in the early evening, taking a nap, and subsequently experiencing difficulty falling and staying asleep at night.
claimAdjustments in sleep-wake timings during aging are associated with a circadian phase advance, which is characterized by an earlier onset of evening sleepiness and earlier morning awakening.
claimThe earlier shift in sleep timing during aging is believed to mirror biological alterations in the circadian rhythm, including an overall decline in melatonin levels, earlier melatonin release, an advance in cortisol secretion, and a diminished range of core body temperature fluctuation throughout the day.
measurementThe earlier shift in sleep timing observed in aging individuals amounts to approximately one hour on average.
claimThe earlier shift in sleep timing is considered a part of normal aging as it is present in otherwise healthy older individuals.
claimAge-associated changes in sleep duration and timing occur across the human lifespan and are linked to underlying neurobiological and physical maturation, as well as environmental factors, according to 'Sleep Across the Lifespan: A Neurobehavioral Perspective'.
Psychosocial Pathways - CDC cdc.gov Sep 1, 2023 3 facts
claimSleep health comprises several measurable dimensions: sleep duration (total amount of sleep per 24-hour day), sleep continuity or efficiency (ease of falling asleep and returning to sleep), timing (placement of sleep within the 24-hour day), alertness/sleepiness (ability to maintain attentive wakefulness), and satisfaction/quality (subjective assessment of “good” or “poor” sleep).
claimSleep health is defined by several measurable dimensions: sleep duration (total sleep per 24 hours), sleep continuity or efficiency (ease of falling and returning to sleep), timing (placement of sleep within the 24-hour day), alertness/sleepiness (ability to maintain attentive wakefulness), and satisfaction/quality (subjective assessment of sleep).
claimSleep health is defined by the Centers for Disease Control and Prevention as comprising five measurable dimensions: sleep duration (total sleep per 24-hour day), sleep continuity or efficiency (ease of falling asleep and returning to sleep), timing (placement of sleep within the 24-hour day), alertness/sleepiness (ability to maintain attentive wakefulness), and satisfaction/quality (subjective assessment of sleep).
How sleep affects mental health (and vice versa) - Stanford Medicine med.stanford.edu Aug 11, 2025 2 facts
Sleep Deprivation, Sleep Disorders, and Chronic Disease - CDC cdc.gov Aug 31, 2023 2 facts
claimSleep timing refers to the time an individual initiates sleep, typically in relation to societal norms and personal obligations.
claimSleep health is defined as a multifaceted concept of sleep–wakefulness patterns tailored to personal, societal, and environmental needs that promotes overall well-being, encompassing not just the amount of sleep but also the timing, regularity, satisfaction, and efficiency of sleep.
Sleeping Hours: What Is the Ideal Number and How Does ... - PubMed pubmed.ncbi.nlm.nih.gov Nov 27, 2018 1 fact
claimBeyond sleep quantity, important sleep characteristics to consider include sleep quality and sleep timing, such as bedtime and wake-up time.
Seven or more hours of sleep per night: A health necessity for adults aasm.org Jul 30, 2024 1 fact
claimHealthy sleep requires adequate sleep duration, appropriate timing, daily regularity, good sleep quality, and the absence of sleep disorders.
Short- and long-term health consequences of sleep disruption dovepress.com May 19, 2017 1 fact
claimNormal healthy sleep is characterized by sufficient duration, good quality, appropriate timing and regularity, and the absence of sleep disturbances and disorders.
The Children and Screens Guide for Child Development and Media ... childrenandscreens.org 1 fact
claimThe presence of screens in bedrooms contributes to later sleep timing, shorter sleep duration, and worse sleep quality in adolescents.