Sleep Fundamentals
- What Happens During Each Sleep Stage: A Plain-Language ExplainerA clear walkthrough of the sleep cycle, from light sleep through deep sleep and REM, without jargon. You'll learn roughly how long each stage lasts and why waking up mid-cycle feels so much worse than waking up between cycles.
- Caffeine Timing: How Your Afternoon Coffee Run Affects SleepAn explainer on how long caffeine actually stays active in the body and why that mid-afternoon coffee run can quietly undo an otherwise good sleep routine. Includes a rough timing guide based on common drink sizes.