bi shape and length as well as tri shape and length is 100% genetics,
meaning when you see guys with short bis like king kamali etc there is nothing he can do to fix it
LOL.....I Know........I enjoy laughing at those people as they try drop-sets, pre-exhaust,high reps, forced reps.....in a futile attempt to make their shitty arms less shitty....ha ha ha ha ha!!!!!