I recall another study that figured out people who are the gym who flex in the mirror all the time (hate those guys!) get more fit. That probably applies to desk jockeys as well.
Awesome. I'll pick up a mirror tonight, and start flexing into it while I work, shirtless.
I'm sure the coworkers won't mind.
Show them this study and tell them the solution is to flex in a mirror while you work. The goal is to get all of your coworkers doing this. Then you'll really have something.