P90x and Insanity? I know people who've done both and say it's good but I'm more interested in Insanity for aid in developing my cardio.. From what I've heard it's pretty much like HIIT, so what do you guys think about it? As a supplement or even replacement to long jogs.
I do a couple of 'Insanity' classes per week but I still run 5 times per week. Insanity classes are great for overall fitness, but if you're a fighter you must run too.