Why is it that some people say to perform a squat to the parallel position and some say to go past that? Isnt it better for risk of injury and muscle growth to perform the squat past parallel? I have went to parallel- not even that in the past and noticed i had knee problems back then. Now i have always been doing them past parallel and no knee problems, just cant lift as much weight as i use to because i am going down a lot farther then before.