Wing Chun Robert
It goes without saying that actors, including RDJ, have to go through a rigorous training regime in order to become fit to play a superhero on screen. While it can be difficult for some people, especially those that needed to bulk up for a role, it wasn’t particularly challenging for Iron Man.

RDJ has real-life training in Wing Chun, a Southern Chinese form of martial arts. At the beginning of Iron Man 3, we get to see Tony going HAM on his wooden enemy, exhibiting similar striking skills that we saw when we watched RDJ use to beat his enemies to a pulp in Sherlock.