I'm with you, El. P90X is no doubt a great product, and if you follow it and work your ass off (literally) it can bring great results.
Thing is, as Boone noted, you have to be motivated enough to get after and stay
after it in the first place. Which, translated, means "lifestyle change."
Last winter I was pushing 220--heaviest I've ever been. Was having lower back issues and starting to feel, at 48, old ... or at least feeling like I could see old from there.
Got scared, disgusted, and finally made the lifestyle change choice.
Stopped eating sugars. Stopped drinking beer and wine. Started PT with pushups, crunches, walking (knew better than to start right back in with running given previous knee/ankle issues). Over the past year I've steadily increased to hitting weights again whenever possible, a daily regimen of pushups, chin/pull ups and crunches, and running anywhere from 2 to 4 miles on average about 4 times a week.
I dropped as low as 175 about six weeks ago, and have now settled in and holding between 175-180. Not being crazy with the diet--just eating and drinking smart. I'm building tone again, the old legs have held up nicely, and I'm feeling about 20 years younger than I did at this time last year.
And I won't go back. At this point it's less about vanity (though any man tells you that's not at least part of his reason for sweating is lying) than it is an investment in the rest of my life. I plan to enjoy middle- and old age, at least as much as my genetics will let me, not merely survive them.
Sorry. Didn't intend to monologue.