Running man's nutrition

Chris Carmichael, who coached Lance Armstrong, modified Mr. Karnazes’ regular diet of vegetables and wild salmon, as well as his exercise regimen, in preparation for the Endurance 50.

To better help Mr. Karnazes recover between marathons, Mr. Carmichael increased the ultrarunner’s intake of carbohydrates (to 65 percent of his diet from 55 percent) and fats (to 22 percent from 18 percent) and lowered his intake of protein (to 18 percent from 22 percent).

He also changed his workouts. Instead of two 50-plus mile runs a week supplemented by shorter runs, Mr. Karnazes began running every day, sometimes twice a day, for two to three hours at a time.

From the New York Times