I've been on this three week cycle program that incorporates quite a bit of power/compound movements like, cleans, deads, squat, Romanian deads, etc. And my lower back has been progressively getting more and more sore. It got to the point were i couldn't even jog without having trouble.
But last Friday was leg day, and me being a dumb-ass decided to go and do deep squats. i worked up to 225 and, on my 8th rep, had this crazy pain in my lower back. So i racked the weight (with much difficulty) and left. An hour later i'm totally fine. No back trouble this week at all! I was thinking something must have been out of place and i knocked it back. Or i pinched a nerve. Any explanations or related stories?