P90X Chest Shoulders and Tri

AHHHHHH!  My lower quadrant on the left side of my back is killing me.  I think I pulled a muscle or tweaked something because it hurts like crazy.  It hurts more when I torque from side to side rather than straight movements, thus pushups and most curl exercises weren't too much of a problem.  Once I tensed my muscle I could isolate and didn't put too much strain on my lower back.  I'm not sure what I did, but the child's pose stretch at the end (right hand over left) almost killed me.  We ennded up skipping ARX today so that we could get to church on time.

I guess I couldn't be in too much pain because I hit a new PR on Plyo Pushups...16!