subject: Can P90X Help Women Lose Weight? [print this page] So if you want to maximize your weight loss goals while following the P90X workout program, then you will need to first find out your maintenance calories with a -500 calories deficit. Just do a search in Google for "maintenance calorie counter" and you can enter your information into a quick calculator that will tell you the maintenance calorie needs then just subtract 500 calories and you are on your way to lose weight with P90X.