That's why I go to the gym 3 times a week in addition to P90X/P90X2.I know you can get a decent chest with it, but I'm talking NICE chest if you know what I mean. Not anything massive, just nice. I feel as most of my push ups are in the reps of atleast 20 (on the harder ones), it would be even better to supplement with some lower rep chest exercises such as bench press, dumbell press/fly etc. One of the things I feel p90x is lacking in.