Cardio is an essential part of being a mixed martial arts fighter.
If you don't have the cardio, then a three or five round fight might be one of the most grueling experiences of your life.
The ability to go three rounds at your highest pace has proved a winning strategy for many fighters. A perfect example is Clay Guida outworking Anthony Pettis in his UFC debut.
Fighters with larger gas tanks are able to outwork their opponents and ultimately wins their fights.
Let's check out three fighters with endless gas tanks.