ive got to dissagree with most on here,,, you gain the majority of your size in your 1st 2 to 3 yrs,,, after that u fight for every lb and every half inch on the tape,,,
for example my arms were just under 18" when i competed as a 20yr old,,, last show at 25 they were only scratching 18 and a half"....... now no matter what i do, unless i fill them full of oil , they will never be legit 20"+ arms...
i had almost the same physique at 19 as i did at 25, altho the latter was much more refined, the basic silhouette hadnt realy changed much..
ive found that to be the case many times over.... its not bein negative, just bein realistic