I do not have anything directly to say about it just one question natural or chemicaly enhanced also back when you were 19 you may have used improper technique as well as now not saying you are just saying it's a posible cause I would never squat 4x a week and I do not know of these routines I'll look into them tomoro morning and get back to you if you have no other feedback from other members ..no disrespect I'm not hating on ur form just stating posibilities