Circadian rhythms and sleep stage timing define the easiest time for humans to wake up
the verdict
SUPPORTED
the evidence backs this
confidence 84/100
Circadian rhythms and sleep parameters (such as chronotype and sleep stage/timing alignment) significantly influence sleep inertia and physiological readiness, thereby defining the optimal and easiest times for humans to wake up.
Evidence for · 3
The circadian system modulates the cortisol awakening response in humans
2022 · cited by 33
Paper 0 demonstrates robust circadian rhythmicity in cortisol awakening responses, highlighting biological readiness states.
See more details
More for · 2
Morning sleep inertia and its associated factors: Findings from a nationwide study.
2026 · cited by 1
Paper 7 identifies clear links between chronotype, sleep duration, and morning sleep inertia upon awakening.
Kairos study protocol: a multidisciplinary approach to the study of school timing and its effects on health, well-being and students' performance.
2024 · cited by 1
Paper 10 discusses how the match or mismatch between biological chronotypes and social schedules impacts human alertness and performance.