Originally Posted by
Mark Rippetoe
I'm having the same pain right now myself. It's an SI joint issue that I have managed in the past with heavy squats. This knee injury has really fucked me up, and I can't squat heavy to fix it. I think the gait asymmetry caused by the injury has destabilized my pelvic situation, in conjunction with several old injuries. Mine hurts when standing and goes away when sitting, but the pain sounds similar. I've had three therapists look at it, and nothing has helped so far. Had to stop taking NSAIDs for my stomach, so there is no effective way to control the pain.
If you figure it out, let me know.