During the last year I think the 90% of the times I can't sleep for more than ~4.5 hours continuously (which corresponds to ~3 cycles), then I'm awake for ~30 minutes trying to sleep, but if I fall asleep again, usually it's not for more than ~1.5 hours (~1 cycle more)
Is this way of sleeping healthy? After waking up I don't feel terrible, but I think I could feel better, I'm currently 26 years old and when I was a teenager I think I slept usually 7 or 7.5 hours continuous...