It's not that intense. Keep at it beyond 90 days and you'll just do everything better -- higher jumps, better core moves (the "chaturanga run" still kills me, though!), better yoga, heavier weights/more reps, etc.

At one time or another over the past decade, I've done a little bit of almost every workout routine out there -- usually not DVD-based, but stuff from knowledgeable people. You'd think that I could walk into a gym and ad-lib a workout, but I just don't care to. What I like about P90X is that it gives me a bunch of things to do, much more than just alternating daily among back n' bi, then chest n' tri, then cardio.

It's also actually self-paced. If you suck, you still suck , but usually they have someone in the room who's doing an easier variation that'll at least keep you moving. You'll do the exercises better as time goes on. Maybe I'll be able to do plyo pushups someday.

If P90X actually gets easy, then augment it with Shaun T's Insanity series. Hoo-yeah...

P90X trivia -- Pink, the singer, does P90X after being introduced to it by her trainer, Dreya Webber -- who's one of the women in several of the DVDs. She also says that she usually turns off the sound because she thinks Tony's commentary gets to be cheesy.

(speaking of the sound, you can play the DVDs with full audio, just Tony's voice, just his vocal cues for changing exercises, or just music; pretty cool for playing your own music during the workout)