What is "fine" anyway. My 20s were a disaster. My weight fluctuated dramatically during my 20s. I was tired a lot. I was sleepy a lot. I mean I had trouble staying awake during the day. I had a lot of depression. I could barely walk up a hill. I was neurotic about my grades. I was always so freezing cold I wore cut off socks on my hands at all times. There was a year where I coughed unrelentingly, started taking cough syrup (codeine kind), took some once and fell asleep and missed my first day of work at a new job. At the same time something was wrong with my intestines and I had to poop all the time although nothing but undigested food came out. Nobody knew of any of this stuff. They probably thought I was fine. I thought I was fine. Doctors said nothing wrong with me. Just stress.
I'm late 40s now and thank my lucky stars I feel younger and healthier than I did in my 20s.
Female, 5'3", 50, Max squat: 202.5lbs. Max deadlift: 225 x 3.