How Sleep Cycles Actually Work

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How Sleep Cycles Actually Work is a practical guide to the physiology of sleep — and how to actually get more of it. No expensive gadgets, no melatonin marketing, no productivity-h ack sleep theater. Just the science of what's happening when you sleep, what disrupts it, and what fixes it. What you'll learn: The four sleep stages — N1, N2, N3 (deep), and REM — and what each does for you Circadian rhythm and sleep pressure — the two systems running everything What actually disrupts sleep, ranked by real impact Evidence-based sleep hygiene — the boring fundamentals that actually work Common sleep myths debunked When sleep problems become medical (apnea, insomnia disorders, restless legs) Your first 30 days — a step-by-step plan to actually sleep better What's included: Full PDF guide (Beginner level, Universal) Free printable worksheet — download at pdflifeguide.com/pages/resources-how-sleep-cycles-actually-work Curated video recommendations from sleep researchers Recommended books and further reading Format: Instant digital download. PDF opens on any device — phone, tablet, computer. Health & Body • Sleep • Beginner • Universal Show more