At the core of this popular guide is "the program" — a 13-week walk/run plan designed to turn anyone into a runner, without injury. Originally developed by sports medicine physicians and refined through three years of clinics and responses from runners, it explains precisely how the beginner should train every day for the first 13 weeks. Every part of the process is covered, from equipment to staying motivated.

New to this edition are sections on training to run faster and farther, interval and tempo training; maintaining fitness on vacation; training for a half and full marathon; and coming back from injuries. A new chapter focuses on running and the family, including running during pregnancy and after the baby arrives, jogging strollers, children who want to run, and running with the family dog. Also included is the latest on nutrition and running, including low-carb diets and other popular diet trends.