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recently during squats i have been feeling a some unatural movement in my knee in the lower medial region it feels like something is knocking together in there, this will be a problem throughout all my sets and the can not be an issue at all the next session then it will come back again, it doesnt cause any pain i just feel somethings not right
http://www.youtube.com/watch?v=Hc-zDlRqoyo Here is what my squat looks like
generally it will go away as the session moves on, could it just be simply a lack of warm up