Erik_K
New
I did three full rounds of the original P90X. It was okay but I didn't really get stronger. I also tweaked a knee doing the plyo workout. First time I ever had anything close to a knee injury.
I've lifted a lot of free weights in my life and never got bulky. Getting bulky or not getting bulky really boils down to what kind of training you do and your body type.
Getting bigger depends on two things: I) what you eat & II) strength training
Clearly you need a calorie surplus to add on additional muscle. You can absolutely get stronger and not necessarily get a lot bigger from strength training.
P90x is OK for some people, some of the time. It's a "canned" routine that does have some good stuff in there. IMO the workouts are overly long and scaling may not be too easy for most folks. Also, like all canned methods, checking the form is all but impossible. Are you really performing the squat correctly? There's more to it than just watching a video (though it can help, don't get me wrong).