When you train, depending on the intensity, your body uses different quantities of either carbohydrates and/or fats. Find out what your body is using for fuel depending on the training you do.
Energy Sources and their use in training:
CARBOHYDRATE- used by the body for energy in the short-term. The body stores carbohydrate in the form of glycogen in the muscles and liver. Glycogen is then broken down to glucose and ATP during aerobic energy production. On average, your muscles store enough glycogen to fuel 90-180 minutes of endurance exercise. The higher the intensity of exercise, the faster these stores will become depleted.
FATS- Used as fuel when your glycogen stores run low, or used during low intensity exercise. IT CANNOT BE BURNT WITHOUT THE PRESENCE OF SOME CARBOHYDRATE. So don’t cut out carbs from your diet; long-term it won’t work for weight loss and you will be fatigued.