gh15s belief that everybody has the same frame size and genetic limitations isn't very believable.
no! ,,not everyone has same frame size,,NEVER SAID THAT,,some big boned people especialy americanos,,some with small bone,,some with balonie bone,,some with no bone,,some people large some peeople smalle,,but you are new here or not dont matter,, i say if refering to gh15 you first rread bible ,,gh15 doesnt like to answer same thing over and over even though does it for benefit of upcoming bodybuild,,
the frame size give max 10lb of difference bwteen heaviest individual and lightest one,,max 10 lb ...the rest is fatttttttttttttttttttttt
ttttttt and waterrrrrrrrrrrrrrrrrrrr
rrrrrrr,,
now,,to the question above,, 5'7 will never be 190lb naturaly that sthe problelm you got here,,he wil be if he is 18% bodyfat or over,,then yes...
so....if 5'7 18% 190lb he can have a 17 inch arm mesured while flexing,,ofcourswe this arm is maybe 15.5 inches when sub 10% and in reality the 5'7 fella will also be 155-165 lb while at this bodyfat and mesurment,,
so yes a true 190 5'7 arm size if gifted and has nice muscle shape and nice beautiful bone

his arm size iwl be 16 inches in good wet pumpy flexy kinda day ,,when all compasses sit right and the sun is shining,,
15.5 -16.5 inches arm ,,walk on stage with 15 inch arms at5-6% if shredded naturaly
now ! this is the truth in your face,,not nice to hear but! the truth!
gh15 approved