This is just a small part of it but i think some of it has to do with the amount of rounds these guys get in these days......the older gen guys were fighting all the time...now a days guys fight once or twice a year and have the whole rest of the year to get out of shape etc....the guys in the past were tougher cause they had to be...i've heard of some fights where the guys spend damn near as much time marketing as they do training...