Figured out my back injury, its the SI joint. It was caused by squats, but im not sure why. Starting to work with heavier weights again since i know its not a muscle that needs to heal. Anyone got any knowledge on rehabbing the SI joint?
Did some squats today at 60kg, with my heels on plates. Huge difference. Easy to stay upright, more stress on legs rather than back. So it looks like poor ankle flexibility is causing my form problems. Will get olympic shoes asap, and start working on ankle mobility as well.
I had an SI issue for a while. Didn't affect my back squats too much, but had a really hard time front squatting or doing KB swings or anything else that had a tendency to pull my upper body forward. I've been working with a chiropractor/ART for a few months now, and it's made a huge difference.