Do I understand it right - you would feel better rested if you woke up at lets say 6 am during light sleep than if you woke up at 9 am during deep sleep (or REM)? Even you actually slept extra 9 hours?
Because some articles seem to claim that.
While I would assume it only applies to how easily you wake up/get out of the bed etc, not how rested you would feel during the day.
Klentelaris pointed me there with his sleep cycle app recommendation
