CrossFit is a fitness program that was founded in 2000. An obvious joke is:
 
Q: What exercise did Jesus do?
A: CrossFit.
   
“Where did jesus work out? Crossfit” was cited on Twitter on November 15, 2011.
 
“What sport did Jesus play?”/“Lacrosse” is a related riddle.
 
     
Wikipedia: CrossFit
CrossFit is a fitness program created by Greg Glassman and is a registered trademark of CrossFit, Inc. which was founded by Greg Glassman and Lauren Jenai in 2000. Promoted as both a physical exercise philosophy and also as a competitive fitness sport, CrossFit workouts incorporate elements from high-intensity interval training, Olympic weightlifting, plyometrics, powerlifting, gymnastics, girevoy sport, calisthenics, strongman, and other exercises. It is practiced by members of over 13,000 affiliated gyms, roughly half of which are located in the United States, and by individuals who complete daily workouts (otherwise known as a “WODs” or “workouts of the day”).
 
Twitter
american eidolon
‏@minkahunter
@asilentflute where did jesus work out? Crossfit
2:27 PM - 15 Nov 2011
 
Twitter
Mike Critelli
‏@CritelliComedy
Q: How did Jesus get into such great shape? A: Crossfit.
12:01 PM - 3 Jun 2012
 
Twitter
Ryan Baladad
‏@RyeBreadBox
What kinda exercise did Jesus do? Cross fit.
9:10 AM - 29 Nov 2012
 
reddit
How did Jesus get His abs? (self.MeanJokes)
submitted August 1, 2014 by thecountnz
Cross Fit.
 
reddit
How did Jesus get those sexy messiah abs? (self.Jokes)
submitted July 2, 2015 by RigobertoAlgernon
He did crossfit.
 
reddit
What kind of exercise did Jesus do? (self.Jokes)
submitted March 16, 2016 by pikk
Crossfit