Quote (TR0LL @ 30 Dec 2010 19:51)
i don't necessarily believe his life is shortening. there was an extremely valid point made by rob lucci saying that luffy can stand pushing his body like this because he is rubber
we've had this discussion before.
He is able to use that technique because he is rubber, but after excessive use of gear 2 it reduces his life.
I'll just take it out from wikipedia.
Quote
Luffy develops two techniques to improve on his rubber abilities. The first of these is Gear Second. He uses his legs as a pump to increase his blood flow, causing it to increase his attack power and overall speed instantly. However, the technique drains his stamina and if overused makes him temporarily unable to move afterward, as well as shortening his life span.