How Sleep Cycles Actually Work
How Sleep Cycles Actually Work
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-hack 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