Consuming carbs during exercise can improve performance. This works by helping to maintain blood glucose levels and preventing hypoglycemia, rather than by sparing muscle glycogen. Keep in mind, I’m talking about maximizing exercise performance here, not fat burning. If you’re doing aerobics simply to burn fat then you don’t want to eat anything during exercise because this will decrease the utilization of body fat as fuel. Competitive endurance athletes may however improve performance by consuming a carbohydrate drink during exercise, such as Parrillo Pro-Carb Powder™. This will help replace fluids as well as maintain blood glucose.