Mok'bara

The mok'bara is a Klingon form of martial arts, similar to Tai Chi.

Worf was a master of the mok'bara, and led sessions aboard the Enterprise-D. One of his best students was Ensign T'Mor. (TNG comic: Perchance to Dream)

Worf's mother, Kaasin, had also been a mok'bara master, and taught classes while on Khitomer. (TLE novel: ''The Art of the Impossible)