Topic
Sleep & Energy
3 articles
Sleep & Energy
The Afternoon Energy Slump: Circadian Dip, Sleep Debt and What You Ate for Lunch
Amount per read4 min
PublishedNov 4, 2026
Written bySarah O'Connell
Contains: Why energy often drops in the early afternoon, how sleep debt and lunch composition make it worse, and practical ways to stay alert without relying on extra caffeine.
Sleep & Energy
Deep Sleep, REM and Sleep Trackers: What Your Wearable Can and Can't Tell You
Amount per read3 min
PublishedOct 25, 2026
Written bySarah O'Connell
Contains: What the stages of sleep are, how much deep and REM sleep adults typically get, how wearables estimate them, and how to use tracker data without obsessing over it.
Sleep & Energy
Caffeine Half-Life and Sleep: When to Have Your Last Coffee
Amount per read4 min
PublishedSep 30, 2026
Written bySarah O'Connell
Contains: How long caffeine stays in your body, why an afternoon coffee can still affect sleep at night, how sensitivity varies between people, and practical cutoff times.