I plan on fighting in the next 6 months or so. I'm fairly confident with my technique but my biggest fear is gassing. How good should one's stamina be before they fight in the cage? Obviously the answer is great, but be specific. I can go three 3 minute rounds sparring boxing or kickboxing at full speed, but anything over that I gas. How does adrenalin in a real fight suck the stamina from you?