When you run, your body burns a mixture of carbohydrate and fat. Your body stores carbohydrate as glycogen in your muscles and liver (the fitter you are the more you store), which is broken down to ...

During the London Olympics, and beyond, many endurance athletes will attempt to increase their muscle glycogen stores by carbohydrate loading. This is because, despite its importance, glycogen is a ...

Rita Basu holds the Endowed Professorship in Diabetes Science in the UAB Department of Medicine Division of Endocrinology, Diabetes, and Metabolism and is a senior scientist in the UAB Comprehensive ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. June 18, 2015 Add as a ...