Factors that Influence the Selection of Fuel Substrates During Exercise

Factors that Influence the Selection of Fuel Substrates During Exercise


Fuel substrates for producing energy in the body are carbohydrates, fats and proteins. Carbohydrates and fats are the primary fuel substrates in the selection for producing energy. Only 2% and no more than 15% during the final minutes of a prolonged exercise are contributed by proteins. Several factors influence the selection of fuel substrates which includes the type of diet of the individual, the intensity of the exercise, and the duration of the exercise.
Individuals who eat a high-fat and low-carbohydrate diet will have a higher rate of fat metabolism. A high-carbohydrate and low-fat diet will produce a higher rate of carbohydrate metabolism in the individual. A high-protein no-carbohydrate diet can cause health problems because essential amino acids are broken down as fuel.
Fats are the primary fuel source for muscle during low-intensity exercises. An example would be an exercise of walking using less ...