MMA people seem to love cardio. I've heard of training classes where like 70% of the time is spent doing cardio and 30% of the time is spent actually fighting. Why the heavy emphasis on cardio? I've seen NHB fights last for a long time (like Gracie vs. Sakuraba, which was like 90 minutes), so I guess you need to be conditioned to fight for a long time. But what about the old saying that if a fight lasts longer than a minute or so both people should run away because they don't know what they're doing? Do confrontations on the street last for more than a few seconds?
I don't know. That's why I'm asking.