My first sacral vertebra (guess it's that one) is prominent/can be "felt"/is out of line by a few milimetres (<1/5 of an inch). I don't know how it was 7 years ago (before I ever touched a weight)...
I don't have any pain on DLs (1RM: double body-weight - 300 lbs; although sometimes it does hurt a little) nor on back flexion-extension exercises (isolated) (using 80 lbs), in fact, I don't have any back pain.
(except when/if I manage to combine flexion with rotation - once in a blue moon - that hurts)
Also, I didn't suffer any mechanical trauma these last few years, at least nothing notable.
Based on what I said (practically no back pain), what's the chance that I have spondylolisthesis (slipped vertebrae)?
And no, I don't insist on getting an X-ray. It'd be a pelvic X-ray and it'd irradiate my balls.
Many thanks, Eisen