I am doing a 5x5 stronglifts program. I squat below parallel and I believe I have pretty good form, but my lower left lat says otherwise. After I perform the 5 reps, I feel a sharp pain in my lower left lat, (and ONLY my LEFT lat). I am thinking this has something to do with either: 1) I am overextending my back in an effort to stay as straight as possible so that it actually arches inward. Or 2) My hand grip position is wacky on the barbell. The other day I squatted with a much narrower grip where my hands were directly above my shoulders and it seemed to feel a little better.
Anybody with a common problem or suggestion?