I’ll quote it here (I hope he doesn’t mind because it’s really interesting, and he makes some great points):
“Yeah, people very often misunderstand the role of stunt doubles, especially in fight scenes. It’s often not as much about skill, or risk as about production logistics. Even if you have a physically capable actor, with MA experience, you still want to use the stunt doubles, simply to squeeze the most out of pre-production time. You can’t lock the star of the show in a room with the stunt crew for a few weeks to rehearse the scene to perfection, they need to well, act. Learn their lines, prepare for their non-action scens, do marketing stuff, photoshoots, etc. What you CAN do is have the stunt double rehearse the entire choreography for months untill it’s buttery smooth and them tag them in on a moment’s notice.
Another thing with actors that have MA background is how different movie fighting is from real fighting – a lot of time real fighting skills and reflexes actually make on-screen fighting look worse.
I think Donnie Yen vs Mike Tyson is a good example showcasing a lot of issues when working with real athletes – we all know Mike is insanely fast, but in this clip he appears slow and sluggish, and you can’t really see the power behind the blows – further below I’ll try to explain why.
BJ Penn and Rampage in this clusterfuck of a movie – in this case choreography, montage, lighting are absolute garbage, but you can still see that they seem weirdly uncoordinated and slow.
Anderson Silva from the same flick, notice the kicks especially, also look at all Randy Couture scenes from Expendables – they’re a dark, shakycam mess, but a lot of shakycam and bad lighting is damage control to hide hits that didn’t sell well.
I am not saying that having actual martial artists on set is bad – but you have to manage them really well, have an action director that will guide them and communicate their vision clearly. In a lot of cases a director will oh so wrongly assume that if they have the star martial artist on set they can just tell them to do their thing and it’ll come together somehow. Also it’s not that being good at actual fighting is somehow a hinderance – all good stuntpeople will be at least competent in one or more actual combat sport or martial art. It’s just they have a LOT of additional knowledge on top, as well as the ability to turn some instincts on and off.
There’s more to this post, including links to good examples of well done fight choreography.