Sandland Sleep - September 17, 2025

Everyone counts 🐑

Let's talk sleep cycles ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏...

Sandland

Timing is everything. Sticking to a healthy bedtime and nighttime rituals is all about confidence

Anatomy of a Sleep Cycle. On an average night, fluctuating brain activity induces anywhere from four to six sleep cycles over the course of eight hours. One complete sleep cycle lasts between 90 and 110 minutes, divided into two phases and four total stages.

NREM, a.k.a. non-REM or quiescent sleep. Stage 1 In the first 5-10 minutes of rest, your body, eye movements, brain activity, heart rate, and muscle activity begin to slow, though you're still awake. At any point in the night, if you're woken up at this phase, you might feel like you haven't slept at all.

Stage 2 At this light stage of sleep, your eye movements stop completely and your body temperature plummets. Your heart rate and breathing normalizes and you begin to experience slow brain waves.

Stage 3 The final stage of NREM is your deepest sleep. When you sleep your brain produces very slow waves known as delta waves. Any residual eye movement completely stops and it is very difficult to wake up from this stage of sleep. Physical repairs get underway at this sleep stage, while the brain begins to consolidate even more memories that originate from learned experiences.

REM Stage 4 After a bout of deep sleep, your brain “wakes up," which gives rise to rapid eye movements (REM). During REM, your brain begins to dream; processes memories and knowledge; repairs and regenerates your body on the cellular level; and strengthens immunity through increased hormone production. The first REM stage lasts for an estimated 10 minutes, but the duration keeps increasing as the full sleep cycle repeats during the night.

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