What Is The Best Source Of Energy During Exercise
An alternative energy source to protein being used for energy.
What is the best source of energy during exercise. Fat is the most energy dense nutrient utilized during exercise with one gram providing 9 kcal of energy. During physical exercise stored carbohydrate or glycogen is converted into energy to fuel the muscles but this supply is not endless. High intensity exercise of a short duration requires anaerobic sources of atp. Moreover fats are the primary fuel source for muscle during low intensity exercise 2 although most fat is stored in the form of triglycerides in fat cells some is stored in muscle cells.
Therefore while it is true that fat contributes a greater percentage of the total energy during lower intensity exercise at higher intensity exercise the total quantity of fat utilized may be greater for exercise performed for an equivalent period of time. And anaerobic glycolysis the breakdown of glucose which is the primary energy source for high intensity exercise of one to three minutes say an 800 meter race. Fat is your body s preferred source of energy for low intensity exercise. While at rest and during low intensity exercise free fatty acids are the predominant energy sources.
During exercise there are four major endogenous sources of energy. Nutrients provide the energy sources for all forms of exercise. As exercise intensity increases the number of calories burned also increases. The process by which fatty acids and other sources are converted to energy during low intensity exercise.
Muscle carbohydrate stores glycogen blood sugar blood fatty acids and intramuscular triacylglycerols. Phosphocreatine as with all out 100 meter sprints exercise under 30 seconds.