I'm similar. I can function perfectly and have a lot of energy and brain focus if I sleep 3:00/4:00 to 10:00 consistently. I will have a half wasted day if I w

I'm similar. I can function perfectly and have a lot of energy and brain focus if I sleep 3:00/4:00 to 10:00 consistently. I will have a half wasted day if I wake up before 9:00 even if I slept 8-10h that night. This is true even for a single night. I don't need a lot of sleep. I need the right sleep. I have been months on a consistent 5h30min-6h per night and feeling great. Working out a lot with little to no injuries and quick recoveries, and getting a lot of work done.