Is there any type of guideline or "formula" for muscle group ratios? In other words, what would the measurents be for someone who is 6 foot tall with a mesomorph type body type? Not looking for what he could max out at but more along the lines of if he had, say, 18.5" arms what should the rest of his body measure (give or take) so as to look aesthetically proportionate. I hope this makes sense!