"I went to the woods because I wished to live deliberately..." (Henry David Thoreau, Walden)
Actually, I went to the woods because Mom and Dad took me there on my morning walk. And I am very deliberate during my time there. In fact, Henry David himself says that there's nothing like a bit of exercise to get the creative juices flowing.
Being naturally rather introspective, I consulted my two-volume set of Thoreau's journals (rather criminally discarded by a New Jersey public library which shall go unnamed) for August 19, 1851: "How vain it is to sit down to write when you have not stood up to live! Methinks that the moment my legs begin to move, my thoughts begin to flow...The writing which consists with habitual sitting is mechanical, wooden, dull to read."
There you have it: the perfect argument for every writer to have an annoying, lovable pup who has only the writer's best interests (plus his own, of course) at heart, when launching himself at the writing chair. The goal: to put both writer and pup in motion.
If you need more instruction on moving, the September Runner's World has tons of info on running with dogs, including the pros and cons of running with a leash, top dogs for running with humans, things to buy for your running dog (why no high-endurance treats on the list? I'm always thinking food).
Somehow, my noble breed is not one recommended for running with humans. The problem? Humans seem to like run in a straight line! Sparky, my beloved brother Dalmatian and an excellent running companion, was fine with that. Me, perhaps because of my contrarian nature, am not.