Zero-grav tumbling

From Memory Alpha, the free Star Trek reference

Zero-grav tumbling is a type of gymnastics activity.

There was a performance of zero-grav tumbling on the Promenade of Deep Space 9 in 2373. Shakaar Edon invited Kira Nerys to the event, but Miles O'Brien objected due to how close she was to giving birth to Kirayoshi O'Brien. (DS9: "The Begotten")