In endurance-based sports, a major goal of training is to enhance the athletes' physiological systems to work at higher intensities. To achieve this, competitive athletes combine large volumes of training, including workouts with intensity levels at or faster than race pace.

The following guidelines outline fueling strategies for common training sessions and race plans. Remember that a fuel guide is highly personal and varies depending on individual diets and also on specific training programs. The following information is for reference only and can help empower your training, by creating, refining, and help you execute your fuel strategy.