Everyone has a different natural circadian. Sure you can force yourself to go to bed at a time when your body doesn't want to and try to "train" yourself, but really you'll just be tired all the time. Your body does not learn a new time, you just get used to being tired.

[–] captainjaneway@lemmy.world 0 points 1 year ago

I guess everyone is different. I used to wake up at 2am for gym + morning shifts. Eventually I woke up before my alarm consistently. I didn't feel tired.

These days, I wake up at 7am most days and feel just like I did when I woke up at 2am.