The problem with asking this question is that it brings forth all sorts of other mildly associated topics to do with Chinese systems in the "Christian mind" which are unrelated, like chi and chakra and control of energies which can be loosely linked with pagan traditions. I've tried all of that and it simply made me uncomfortable.
Don't rely on our opinions. You have God living inside of you. I don't know whether martial arts is harnessing a power that doesn't belong to us. I certainly wouldn't think so and I wouldn't bat an eyelid before trying it. I suppose a lot of things are like that. There's Christians who will watch Harry Potter and Christians who even despise The Chronicles of Narnia— you can apply this logic to anything.
If it makes you feel disturbed— you— personally. Don't do it.
Don't rely on us, because we will all have different experiences. Some will say it's okay, some will say it's not.
I'm gonna just quote Paul here and leave it at this.
1 Corinthians 10:23
All things are lawful for me, but not all things are helpful; all things are lawful for me, but not all things edify.
Is it helpful? Does it build you up? I don't know. You tell me.
This is the fun of having a relationship with our creator.