Sleep cycle
Topic
The sleep cycle is an oscillation between the slow-wave (NREM) and REM (paradoxical) phases of sleep. In humans, this ultradian cycle typically lasts between 70 and 110 minutes and repeats several times throughout a normal night's sleep. It is distinct from the circadian rhythm, which regulates the overall daily alternation between sleep and wakefulness.
2 episodes featuring Sleep cycle
Huberman Lab Essentials
Sleep architecture dictates how the brain cleans itself and processes trauma
Understanding the distinct phases of sleep reveals how targeted rest protects cognitive longevity, emotional resilience, and daily learning capacity.
Sep 3, 2026 · 34 min
The Diary Of A CEO with Steven Bartlett
Neurologist warns improper vitamin D use can disrupt sleep and gut health
Modern indoor lifestyles have depleted our natural hormone levels, and understanding the delicate balance of vitamins is essential to reclaiming deep, restorative sleep.
Jul 27, 2026 · 2h 0m