See the list on the right of Martial art related projects who organise work on these articles. You can also add your self to the list of Wikipedians by martial art
If you come across a martial arts related article, adding the project template ((WikiProject Martial arts)) to the talk page will help identify them for improvement and linking to related articles. For Boxing, Fencing, Mixed martial arts and Sumo. Use ((WikiProject Boxing)), ((WikiProject Fencing)), ((WikiProject Mixed martial arts)) and ((WikiProject Sumo)) respectively.
Monitor and contribute to deletion debates (Boxing).
Wikipedia requested images of martial artists, mixed martial artists and boxers.