I did a lot of bad mouthing about Kenpo X during my first go around with the P90X. I said that it got boring and easy. I sometimes even went as far as replacing Kenpo with the hellish Plyometrics. So this time I decided to spice it up and add little weights in my fist during the punches and kicks. Well, I dunno if it was just that or the fact that I am a little out of practice, but I started to dog it about halfway through. I felt like it really tested me. Not the whippy Kenpo X I remember. Perhaps it heard me bad mouthing it and this was its sweet sweet revenge. Now I feel it in my back and all over my body. I think I will learn to respect the Kenpo X in the future.