I have this weird problem when I squat down (with or without weights) I get this kind of clicking/rubbing/popping feeling on the outside of my left knee. I can actually FEEL it with my hand too if I touch the knee and squat down. It doesn't happen if I turn out my feet 45degrees though. Hard to explain exactly what the feeling is, but it's like a tendon is 'rubbing' over another tendon... or something...
Any ideas? Is it bad to just squat with feet out at 45degrees if everything feels ok?