Vascularity at Bodybuilding Shows

i've got a question thats been bothering me for awhile.when bodybuilders are doing their shows, how do they stay so vasacular(sp)on stage?i know they pump b/4 they go on.but do they use anything?no i've got no interest in doing shows,just curious.   thanks

Vascularity shows much much more at such extreme low bodyfat percentages.
See Ya

Yup very low BF and genetics some ppl have veins near the surface some dont. but get to extreme low BF and it dont matter to much. Add in a nie carb spike to get that blood pumpin and well

Phill

In addition to whats already said, one avoids sodium and dehydrates the body prior to a show, making the skin extremely thin

a strong tan helps, too

add a little niacin into the mix for good measure too

-S