Although we have a tremendous amount of research on sport nutrition strategies to optimize performance in runners, there's very little research on long distance triathlon. It's impossible to isolate one variable in a triathlon-focused experiment. For example, with so many different environmental, physical, mental, terrain, pacing, fitness and physiological factors contributing to performance in a 70.3 or 140.6 mile event, it's impossible for research to create specific sport nutrition guidelines for swimming, biking and running when there are so many unpredictable and uncontrollable variables. We must recognize that running off the bike for 13 or 26 miles in a half or full distance triathlon (respectively) is very different than running a stand alone half marathon or marathon. For example, a stand alone endurance runner will start the race is cool or cold conditions, first thing in the morning with a body that is glycogen loaded and well-hydrated. Marathon races are oft...
3x Author, Board Certified Sports Dietitian, Master of Science in Exercise Physiology, 20 x Ironman finisher, 3x XTRI finisher, 6xIM World Championship finisher, Triathlon Coach, 32-year Vegetarian. Trimarnicoach.com