if tank wouldve trained his endurance as much as he did his strength he wouldve been champ for a LONG TIME. I mean honestly, if the first 4 mins of any fight(with few exceptions) where did you really see tank losing? There are a few exceptions, I remember him tapping early in the 1st, i dont remember who he was fighting though. But tank highlights the necessity of training for duration. Look at tito, he is a decent fighter, not really that good at all, but he can go 15 mins, and his opponents gas. When the fight is over qickly tito usually loses, when it is decision, or a 3rd round ending its usually tito.