I understand that some fighters have better cardio than others. I understand that it's very difficult to go for 5 rounds in a cage fight. But how can you gas, as a professional fighter, in the first rounds, after 3 or 4 minutes of fighting? You have camps. You do trainings. You have coaches. You have experience in the fighting field. And stil, you gas. PS: I am not talking about guys like Kimbo or Dada.