I must know something about weights since both my sons ,who i have lift at home have both been the strongest kid on their highschool football team. Oh yeah my youngest one who is a soph now only weighs 160 lbs. Go past parellel on your lifts good luck. Been there done that. I know my youngest son isn`t going to do it. I`ve been told by more than one surgeon that going past parellel is just a matter of time. Two bad knee`s tell me they were right.