I've been doing the HCT-12 Routine and last week was my week off, so maybe this had something to do with it. Yesterday I was doing squats, and I know I don't have the greatest technique in the world, but I guess something must have tweaked. I could feel it throughout the day, just a little sore...this morning I woke up and could hardly move. Hurts to breathe and when I went to the bathroom, it was so painful that I felt like vomiting. I'm attaching a crappy MS Paint image of where exactly it hurts, just wondering if this is a common injury? It's definitely muscle and not the spine itself, but it's unbearable. Should I take more time off? Should I just not do squats for a while? When the pain goes away, is it ok to continue lifting or should I take extra time off after the pain is gone to ensure it's healed?