TheComo is correct. While it is a matter of personal preference, if you're shooting a fight scene and want the flexibility also of doing post over/under cranking on SD you need to have as many usable frames as possible. Thats why shooting a 1/60 shutter and using a scene setting for 30i will give you the best look generally speaking. everyone has preferences but these settings are pretty standard for sports shooting because they capture fast action as well as look better under/over cranked in post. Most martial arts stuff you shoot you will probably want to stage slower than full speed and speed up in post to give a better effect.
This is a trailer for a short I worked on which was a boxing movie. We used the DVX and the DP used all the shutter and scene settings I mentioned.