P90X is awesome and will really bring results, especially if you follow the diet plan. I started a paleo diet about 5 months ago and have been doing Krav Maga and a "fit to fight" program for a year and a half. Never felt better. Core strength and flexibility definitely increased, and the "explosive" techniques of Krav have really helped with late acceleration and timing in general.
HALO | ESCAPE | BANDIT | RIVAL | PATRIOT | RESISTOR | FUGITIVE | FUSE | GHOST | VERDICT | CREDO | CLUTCH | PURE
Be ye not lost among precepts of order
-The Book of Uterus 1:5