P90x Lean, classic or doubles?

Question

I want to build muscle and strengh and get big

Answer 1

I have no idea what you are talking about

Answer 2

Well since you put this question into the tennis section, I am assuming you want to use P90x for tennis. I have the dvd collection and I wouldn't advise using it if you want to build muscle strength/"get big" FOR TENNIS. The format of the DVDs would have to be tinkered with as they are for general fitness and not specifically for tennis athletes. For example, I would suggest doing their abs but incorporate medicine balls tosses to strengthen your core. You could probably research this online and find specific tennis-related exercises that would give you better results FOR TENNIS.

If, however, you are using P90x for general, over-all fitness, then by all means, use it.