When did you first run under 5 minutes and can you still do it now? What kind base training and workouts did you do and what 800m shape were you in when you cracked 5?
I broke 5:00 as a freshman off of probably 30 mpw w/ a lot of 400 repeats (which seem comically slow now but were difficult then) and tempo stuff. I didn't race 800m and would have struggled immensely to crack 2:15. Just too flat in the speed department.
Now I'm running ~40+/- just coming out of summer base for turkey trot season. I recently broke five again w/ no workouts in the six weeks prior except a tempo effort. I suspect I could run 4:45 w/ competition today. Training injury-free since May has been really satisfying.