Now this isn't a knock up against you, but I hate these weird, nebulous terms that come up from mainstream exercise/health media. Shape up, get toned, get fit, tone up, etc. Most of it just means lots of running/ moving around, losing weight, and hoping to look like the guy on the cover of
Men's Health.
In reality, you can
- reduce bodyfat
- increase muscular bodyweight
- gain strength (which often goes hand and hand with the previous point
- improve conditioning so you're not a sweaty mess after going up a flight of stairs
From what I know about P90X, it just has you run around a lot and do a bunch of bodyweight stuff. If you don't fudge on the diet, you'll probably lose some bodyweight and gain some muscle/strength, granted if you've never regularly exercised before