call me incredibly stupid, but I don't really see how it is possible to train EVERY bodypart 3x a week unless you are pulling 2 a days and not taking more than 1 day off. Are you training quads 3x a week, hams 3x a week and calves 3x a week too? Most guys I see who train arms and chest 3x a week do so at the expense of other bodyparts (primarily legs)...maybe I'm unfairly jumping to a conclusion, but a 170lb guy with 18" arms most probably has the legs of a stork.