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Three major energy reserves in humans are carbohydrates, fats, and Protein. The relative amount of energy stored in carbohydrates is 1500 kcal, Fat is 135000 kcal and Proteins is 25000 kcal.
What are major energy reserves in humans?
Protein, fat, and carbohydrates all have different functions when it comes to sustaining exercise.
- Provides a very effective source of fuel — Carbohydrate is the body's most effective fuel source since it requires less oxygen to be burned than protein or fat. When the body cannot metabolize enough oxygen to meet its needs during high-intensity exercise, carbohydrates become increasingly important. Maintains brain and nervous system health—When blood glucose levels fall, you get agitated, confused, and tired and may be unable to concentrate or carry out even easy tasks.
- Provides a concentrated source of energy—Fat has a potential energy yield that is more than twice that of protein and carbohydrates (9 calories per gram of fat versus 4 calories per gram of carbohydrate or protein). Contributes at least 50% of the energy required by muscles during low- to moderate-intensity exercise, both at rest and when exercising at or below 65% of one's maximum aerobic capacity.
- Energy during the final stages of prolonged exercise—When muscle glycogen stores begin to deplete, as is frequently the case during the final stages of endurance exercises, the body converts amino acids contained in skeletal muscle protein into glucose to provide up to 15% of the required energy. gives energy when a person's daily diet is deficient in total calories or carbohydrates. When this happens, the body must turn to protein for energy, which causes lean muscle mass to break down.
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