the theory is that interval training kicks your metabolism into high gear for several hours after the workout. normal cardio sessions your metabolism returns to baseline much faster. So you burn more calories and that helps burn more fat. they definately illicit a growth response too and that will burn more cals as well during the next day or so where jogging or biking never did that for me.
the best part by far will be your ability to recover while fighting and training.
I guess to be Iron Cardio I'd have to be using a weight
I"ll probubly start with bodyweight stuff
like Burpees or Squat Jumps
altho I can only accellerate a Squat Jump so fast so I'm not sure I can get enough out in 20 seconds to really get cardio out of it
tho after the whole four minutes I'll be pretty worn out
yeah some exercises just work great with the 20sec / 10 sec thing others you have to modify both the time periods or the intensity but its a good starter
my recovery time during fights and in between fights while training has made dramatic improvements recently and i am dieting big time