Tai chi

Tai chi chuan (or "tai chi", "taijiquan") is a martial art originating in China on pre-space-flight Earth.

By the twentieth century it was commonly practiced as exercise, as a meditation, or for esthetic reasons rather than for actual combat.

23rd century
Wheel and other stewards on the USS Mumbai did tai chi exercises before preparing breakfast each morning. 

25th century
Virginia Harrison-Black practiced tai chi a girl. Sienna Britch), a Trill, learned tai chi and had ambitions to be an instructor. (Federation_Space_RPG)