Book excerpt: Fit to Surf, a cutting-edge surfing-specific fitness guide, supplies surfers of all levels of experience with everything they need to create a personal fitness program that builds strength and endurance, increases balance and coordination, and minimizes the risk of injury. Personal trainer Rocky Snyder--himself an avid surfer with two decades of experience riding the waves--provides easy to-follow, step-by-step instructions supplemented with 60photographs of conditioning exercises that can be performed at home, in the gym, or on the water.