Stefan,
I have been doing Crossfit a few months, and have had fun with it. Fitness has been an important part of my life for a few years now, and I was looking for something more exciting than conventional weightlifting and cardio exercises.
Recently I saw a Reason interview with Greg Glassman, in which he described himself as rabidly libertarian. Glassman is the founder of Crossfit, and he seems like a cool guy.
Admittedly the Reason video doesn't say much about his principles. However I think this lecture, at the Illinois Policy Institute, does. He shows a profound understanding of the free market, which goes a long way to explaining how Crossfit exploded in the last five years.
Getting an interview with him can't be easy, given what his schedule must be like. I don't see any contact information for him online, so one might have to ask the Reason reporters how they got in touch with him. I considered doing this, but it's better I know you are interested, before making inquiries. Also it might be something you prefer to do yourself.
Thanks,
Lowe