Ke Ji LI,52,Professor of Department of Nutrition and Food Hygiene, School of Public Health, Peking University. Vice Director of Chinese Association of Special Nutrition, Member of Standard Committee of Nutrition and Foods for Special Dietary Use, Chief Advisor of Physical Activity Expert Group of National Campaign of Healthy Lifestyle for All, Expert of Scientific Consultation Committee for Function Food Registration of Sino FDA, Member of Executive Expert Group for Chinese Dietary Reference Intakes and Chinese Dietary Guideline. Research interests include physical activity and chronic diseases, obesity and energy balance, carbohydrate and fat metabolism in exercise, micronutrient requirements, and sports beverage.