Gym Bros are everywhere. They are among us, and indistinguishable from all of us. Like masked superheroes they don their special suits when it’s time to hit the gym. Having said that, gym Bros are not a monolithic group. So, if they’re passingly normal, everyday folks like us, what is it about them that gives them their bulletproof discipline? How do they manage to stick to their routines, come hail or storm?