If I can't swing being a professional dog-walker when I retire, perhaps I will be an impersonal trainer, and inspire people to keep in shape through detachment: I don't really care if you do those sit-ups, because I'm watching this golf match on TV and not paying attention to you one bit . . . in fact, your fitness level doesn't interest me in the least, I'm much more concerned with myself, but I've read that doing the plank might be good for your core . . . but whatever, your choice, what do I care if you get in shape?