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The 90-Minute Blueprint: How Sleep Cycles Actually Work
Everyone talks about sleep hacks, but hardly anyone can describe what a normal night of sleep actually looks like. This episode builds the road before studying the potholes: the four-stage architecture of healthy adult sleep. We walk through N1 (the doorway), N2 (the workhorse with sleep spindles and K-complexes), N3 (deep sleep's brain janitorial services), and REM (the paralyzed theater of the mind). We also explore how the AASM's 2007 merger of stages 3 and 4 changed the standard framework, why the first and last sleep cycles look completely different, and how the glymphatic system clears…
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