Well, I wont call the back pumps on Crakerdrol insane, yes I do have lower back pain, but its less than what I experienced on M1T. Also I have learned to control my urge to lift as much as I can, I did double my body weight on bend over row one day, and that was about 50 pound more than my usual, hell I was hurting next day like a monkey that fell of the tree while smoking dope.