Now Completely Updated And Revised--a New Edition Of The Long-running Marathon Training Guide That Has Helped More Than Half A Million People Reach Their Goals.marathon: The Ultimate Training Guide Is Among The Bestselling Running Books Of All Time For Many Reasons, But Above All Others Is This One: It Works. Marathon Running Has Changed In The Seven Years Since The Fourth Edition--there Are More Runners Than Ever Before, The Popularity Of Half-marathons Has Grown Immensely, And Guidelines For Best Recovery And Diet Practices Have Changed. This Revised Fifth Edition Includes A New Chapter On Ultramarathons, Along With Material On Recovery Techniques, Several New Training Programs, And Advice On How To Win A Boston Qualifying Race And Improve Your Personal Record.