What is the proper form for squats? I've been doing them normal, without barbell, and I would do around 200-300... sets of 50... just to feel something. I went to the gym and was doing it with the same form i used to do it, only with the bar... And a dude "corrected" me and said I had to fold my knees to a 90 degree angle. I was doing that, but today I felt a slight strain on my right knee... I was wondering what is the proper form for this excersise? And if it can be substituted by normal squats (No barbell)... Maybe instead of 10 reps of bar squats, do 20 of normal squats? Help me out plz. Im young, and not looking forward to being injured 