Why Do I Wake Up Exactly 4 Hours After Falling Asleep Every Night?
That 3-4 hour wake-up isn't broken sleep—it's your brain transitioning between sleep stages. Here's why it happens and what actually helps.
8 min read
Tag
#sleep-stages
3 articles
Sleep Stages Explained: Your Brain's Nightly 4-Part Symphony
Understand N1, N2, N3, and REM sleep stages - what happens in each, why they matter, and how to optimize your natural sleep architecture for better rest.
16 min read
How Sleep Trackers Actually Work: The Technology Explained
Sleep trackers use accelerometers, PPG sensors, and algorithms to infer sleep stages. Here's what's actually happening on your wrist and why it's not like medical testing.
16 min read