There are many aspects to becoming a successful Mixed Martial Arts fighter. Elite MMA fighters will train in several fighting disciplines. Many successful MMA fighters started their fighting career in one fighting style and through training have successfully evolved into a more complete fighter through several disciplines. An example would be a former collegiate wrestler will cross-train in boxing and other martial arts to compete at the highest fighting levels. However, it doesn’t matter how good your skills are at wrestling, boxing or any other martial art if you are lacking cardiovascular endurance. Great fighters can become virtually defenseless if they run out of steam during a fight. Without proper oxygen to the lungs, it becomes difficult to simply hold your hands up. Cardio training is an important ingredient in any fighters training regimen.