Well I guess Diaz still has it since his training is his lifestyle he enjoys doing. But for those who are a fan of boxing know a fighter named Antonio Margarito who is known for the plaster controversy. However there is no denying that he did posses a super human endurance/cardio levels that rivaled Nick Diaz. Like Nick he was an insane pressure fighter with similar physique and attack style. Got me wondering who had the better cardio, Nick or Antonio?