Arhitectura somnului.
23 Aug 2023 · 1 min

0:31
Sleep comes in 90-minute cycles, and you need about five of them to feel rested. Your heart rate changes with each phase, slowing dramatically during deep sleep. Eight hours in bed doesn't guarantee rest if you're not completing full cycles.
Questions this video answers
Approximately one and a half hours (about 90 minutes).
Five cycles.










