Kirk and Spock work out together routinely at least once a week guys, it's canon.
It's not just fanfic fodder, it's real.
Kirk and Spock sparring together every week in those tight red standard fleet-issued leggings confirmed.
Somebody please tell @sidetrek we need more sparring art to commemorate this celebrated event.
(If you don't know what I mean, sidetrek does flipping incredible spirk art including fabulous spirk sparring in the red pants art. I love you for it.)
Anyway.
KIRK AND SPOCK WORK OUT TOGETHER.
THAT IS ALL.
(No it ain't.)
Bonus: Kirk and Spock's Flying Circus f**king that Skorr's s**t up. No genocidal multi-world wars for you, señor pájaro, but nice try.
The power of IDIC compels you! *Throwing around Saurian Brandy like holy water*
(If you haven't watched TAS yet . . . Why?)
TAS 01x16 The Jihad
Sources: sidetrek, Star Trek The Animated Series, crappy Netflix screencaps done by yours truly