[ChipWrecked]

Two things about his body: The cancer took some mass out of his upper body, while leaving him his power-making ability. In the long run it helped him.

Also, he is a born freak of nature. His heart started 10% larger than normal, now it is 30% larger than average. His lungs are far more efficient than most people's. And most importantly, IMHO, his tolerance for lactic acid buildup is superhuman. In short, his body already is what most cyclists have to dope up to try to acheive.

That said, I believe personally he's an arrogant, self-centered dick.