A punch doesn't come only from the arm. It's the whole body that's behind a punch. Try it with a weight vest.
I'm not saying his is the ideal body type, but he certainly has more punching power with that additional mass than without it.
I've always wanted to try those weight vests. I figured I'd last about three minutes of intensive training.
Who here has naturally good cardio. You get a big sob comment from me then, cuz my conditioning has always been like well...prolly better than Matt Serra's brother. Nothing is worse than that...lolz!
Marcus Aurelius: Tell me again, Maximus, why are we here?
Maximus: For the glory of the Empire, sire.
Baked, not fried... the healthy choice.