Choose natural, unprocessed foods whenever possible. Carbohydrates are the primary source of energy . FAT Fat is actually stored energy. Fat sources are used most often in lengthy workouts. Vegetable fats tend to be unsaturated and better for your heart.
Protein is used as an energy source, only in the absence of carbohydrates.
All information provided by Amy Janeski, Registered Dietitian with Sodexho Marriott Services.