Ok guys im pretty frustrated right now as you can tell by the thread title. Ever since i switched my workouts from super heavy weights for 4-6 reps to lower weights of perfect form for 8-12 reps ive lost major size and strenth in my muscles. My main problem is my shoulders shrunk and i cant push nearly as much weight as i used to. Is perfect from really all that crutial? or is it more crutial just to move the weight. I know everyones body is different and there is no definitive answer to this quetion but i need some advice.