Jeff Rothschild is a Registered Dietitian (RD) with a Master’s degree in Nutritional Science and a PhD in Exercise Physiology. He works with Olympic and World Champions, and triathletes competing at Kona as well as people trying to complete their first triathlon, feel better, improve their energy levels, and learn how they should be eating to achieve their goals. Jeff’s PhD research looked at periodization of carbohydrate availability for endurance training with a focus on pre-training intake. He is also a Research Associate at the Sports Performance Research Institute, New Zealand (SPRINZ). As a sports dietitian he works with endurance athletes that have completed over 100 full and half-Ironman triathlons and tennis players including multiple Olympians, Grand Slam winners, and collegiate All-Americans.