A more decorated Royal Guard, with a plume flared back over his helmet, currently shouts, motivates and berates some of the Ponies mid-trial. One dangles from the pullup-bar, struggling to get up. Another has done a few push-ups, and is already gasping for breath. I guess most of the Ponies stamina came from their movement, not bursts of effort like this; it's not like Canterlot is the center for labor-centric jobs either.