Audible now wants to serve as your personal coach -- the audiobook service is launching audio fitness programs through an alliance with Aaptiv. Each program has a professional trainer guiding you through a progressively challenging set of workouts with a clear goal in mind, complete with a soundtrack to keep up the momentum. The first three courses are aimed squarely at beginners interested in outdoor running and stress-relieving meditation, but follow-ups in the weeks ahead will address more challenging issues, such as the boredom that sets in with an all-too-familiar gym routine.