this post was submitted on 31 Jul 2025
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The human REM sleep cycle is 90 minutes long. As long as your sleep in multiples of 90 minutes, you'll feel rested. 9 hrs or 6 hours would work but not 10 hours or 30 minutes.
Edit: I meant the entire non-REM and REM sleep stages altogether and not just the specific section of REM.
My ~~German~~ Garmin tracks my sleep daily and I’ve never had a REM stage of sleep be 90 minutes.
I don't have a German that would track my sleep :(
They’re all the rage, if you can get a mute one then it’s better otherwise they keep banging on about fair wages and sleep breaks 😩