Note the involvement of Inge Topperwien who would go on to play an integral role in the founding of Nautilus (as well as eventually become Arthur’s wife.)
Is that, then the “ultimate physique?” For most people, it is far beyond the limits imposed by individual potential; but it is almost certain that somebody will eventually exceed even Sergio’s present size and proportions. I recently measured the “cold” upper arm of a 19 year old boy in New York at 19 1/2 inches, and with continued training this boy can almost certainly exceed Sergio’s measurements – but he is at least six inches taller than Sergio, so even with Sergio’s measurements he would not have Sergio’s almost unbelievable proportions, would not give the “impression of size” that Sergio does.
I am reasonably certain that Sergio could attain even more size with continued training – while maintaining or improving his present degree of muscularity (muscular definition), and if so, then his proportions would be almost unreal. But in the meantime, until he does get larger, or until somebody at least matches his present proportions, Sergio certainly does represent the “ultimate physique.”
Nautilus Training Bulletin #2