I’ve always found it interesting how the age of mixed martial artists competing at the highest level is usually much higher compared to other professional sports (although I suspect the ceiling will decrease as time goes on). Not that this is any sort of groundbreaking revelation, but as Joe Rogan points out in the video above, the career span of a fighter has a lot to do with how much damage a fighter takes throughout his career.
For example, you have guys like Wanderlei Silva and Antonio Rodrigo Nogueira, both in their early-mid thirties, whose better days are probably behind them, and guys like Lyoto Machida and Anderson Silva, also in their early-mid thirties, still consistently competing on an elite level. The glaring difference between first and second group, of course, is Wandy and Big Nog have absorbed a tremendous amount of damage in the past ten years, whereas the the latter two have hardly taken any in comparison. Not to say that the first two aren’t intelligent, but in terms of fighting styles, you could certainly point to the way Lyoto and Anderson fight as a major reason for their durability.