I'm doing Starting Strength atm and I'm having trouble with the squat. When I squat below parallel my lower back rounds. I've heard this could be an issue with hamstring or hip flexibility and I was wondering how I could improve that?
The squat is proving to be a bastard to learn properly. At first I had a shoulder flexibility problem, and I could only safely squat with the high bar position and wide grip, but the extra torque on my lower back made the lift harder. Now my shoulder flexibility is improved and I can have the bar in a lower position, but I don't really think the lower back rounding has improved. I don't have a video to show you the form, but I'm almost certain I can feel it.
I do stretch the hamstrings and hip flexor pre-workout but it's still not enough.