I heard that huge veins sticking out of your arms means you are lean well my body fat is 5.9% and I'm 15, 6ft tall and 160 pounds and I bench 245, curl like 45 with one arm, Lat Pullover like 320, lat pull down 130 on daily workouts, and was triceping 80 pound weight behind my head untill I switched to the machine with cables now I use like 90... I notice when I lift my veins pop out of my arm and by my elbow almost .5-1 inch, it either does it then, when I flex, or when I constrict the upper part of my arm. Is this a good sign while lifting weights... What does it mean??? (I don't use supplements EVER)