Here's a little snippet of an interview with John Cho from trekmovie.com (note that the actually article link has some spoilers):
TrekMovie: Once you got the script, what was it like for you, since Sulu is a little different than he was in the show and has a lot of action. Were you nervous about that or excited?Read it in full here.
Cho: A little bit of both. I was thrilled he was out of his chair and getting into the mix. If I had one complaint about the old show, as an Asian-American, I wanted to see Sulu get involved a little more and kick some booty. And this is it, this is happening. I can’t believe I am fulfilling my own personal dream and having Sulu shaking it. And secondly, I was like ‘I have never done this before’, I have never done action before so it was a completely different way of working for me, where I led with my body. Strangely, that stunt work we did a couple of months prior informed everything else. I was surprised by that. That the way my body changed as a result of doing all that training, kind of made me a different person. I was like ‘I like this, I am going with this’ it was a little like an Academy experience for us. It informed how I sat in the chair, how I attacked every line. It was surprisingly useful.