I have a friend who does the p90x and he gets amazing results from it.He hasn't really bulked up from it because to do that,obviously your diet has to be in check.But he has now got an amazing body from taking this 'course' and he says that he's never felt so strong and healthy in his life.But if you can be dedicated to the p90x and also be dedicated to your diet,I would think that you'd bulk up some hard muscle pretty quickly.Soooo.......I would say that the p90x is well worth giving a try!!