Looks like crosffit enthusiasts aren't the only ones embracing the "sit-less" doctrine. Here is famous photographer Chase Jarvis:
Even though my career is based in action sports photography — I climbed mountains on several continents, was up early, to bed late and generally active when shooting — only a very small portion of the work of photographers requires us to be shooting. There’s a lot of time spent in travel, post production, in client meetings, retouching images, or developing new concepts at a desk. Even when I was on location, what we’re doing is hardly ergonomic. I was bracing the Nikon D–whatever top of the line camera with a long lens out in front of me for about 10 years. Imagine the toll.