Why do some fighters' primes differ?

[IMDAZED]

How does it differ from person to person? Like Floyd is 32 and he looked quicker and sharp as ever and Pernell was done by that time?

Because humans differ from person to person?

Just a guess.

[Squabbles94806]

genetics. And it all depends on how you take care of your machine. Or yourself. Without a doubt, Floyd was in fight shape all those 19 months he was off. Perhaps the only reason why he didn't ko Marquez is cus he wasn't in competition shape. I'm more impressed with Roger Mayweather. What the fcuk did he tell little Floyd all those years growing up during training.