6. The Diaz Brothers – Triathlons
The Diaz brothers have better cardio than any other fighters ever. Nate got tired at UFC 202, but only a little, and that was an absolute war for 25 minutes. The reason they both have cardio for days is because they are both avid triathletes. Nick Diaz claims to race every 2 weeks during triathlon season.
Additionally Nick Diaz is known to swim to Alcatraz and back just for fun. He claims that he has done so 5 times in the past. That stretch is pretty dangerous and shark-infested, which is kind of the reason they put a maximum security prison out there. Swimming there and back is not the greatest of ideas, unless your Nick Diaz, then its a perfectly reasonable thing to do.
