Hi Jason. Which is ‘better’ depends upon WHO is performing the exercise, and WHY they are doing it? Personally, I do not promote either program in my own practice. In my opinion this form of ‘high-intensity exercise’ is not for everyone and so I believe that which is ‘better’ is a matter of looking at a number of factors, including the ‘who,’ is performing them, ‘what’ is their current physical/health condition before beginning, and ‘why’ they are doing it, before determining ‘which’ may be better for a specific person or situation.
I kind of agree with LaRue’s statement. I do promote ‘high intensity exercise’ to most everyone that trains with me but I also don’t think a pre-structured program is the best way to benefit from it. On there own, P90X and Insanity can be utilized by apparently healthy, athletically inclined persons, in the same way as going to an advanced aerobics class. I have seen and used both for familiarization purposes and that is the basis of my opinion. P90X was more structured towards learning in their given materials but both kinda just throw you behind the wheel.
Advantage: P90X for slightly better educational emphasis.