So I've been squatting regularly for a couple months following Rippetoe's Starting Strength program. I have read the book and tried to follow the form as he outlines it to the letter. However, as I descend in the squat my torso seems to lean forward "too much" and just before parallel my low back rounds no matter how much I try to keep it neutral or arched. Now I am having intermittent knee pain during the day.
I am guessing that I am having trouble because of tight hip flexors or hamstrings? I'm kind of at a loss as to what to do. I want to keep squatting but don't want to destroy my knees in the process. Someone suggested using squat-to-stands but I can't get into the bottom position without losing the arch in my back. Any advice is incredibly appreciated.