arnold's chest and rib cavity was unique not seen much since him,his leg's were small but good seperation,ad his delt head's posed were very compete,he was tad slouch shouldered.and his pec's were overpowering but they were thick and full.today's pro's outmuscle him but his build in certain poses's had a different look than today's guy's ,even relaxed his pec's and arms were freaky full.