What Are The Three Sources Of Energy During Exercise

Muscle carbohydrate stores glycogen blood sugar blood fatty acids and intramuscular triacylglycerols.

What are the three sources of energy during exercise.

Aerobic glycolysis has a slow rate of atp production and is predominantly utilized during longer duration lower intensity activities after the phosphagen and anaerobic systems have fatigued. Most of the body s activities use a continuum of all three energy systems working together to ensure a constant supply of energy. 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. The body begins to use fats for atp production during exercise that lasts longer than 20 minutes.

Fat is the body s most concentrated source of energy providing more than twice as much potential energy as carbohydrate or protein 9 calories per gram versus 4 calories each per gram. A basic understanding of how our body uses energy during different forms of exercise is critical for designing an effective exercise program. Beta oxidation occurs when fats are used for energy. During exercise there are four major endogenous sources of energy.

The body uses 3 different systems to supply cells with the necessary atp to fuel energy needs. Aerobic training increases the body s ability to mobilise fat as an energy source at sub maximal intensities as well as improving carbohydrate metabolism. An understanding of the involved energy systems in a particular sport gives valuable information about the strength qualities necessary in that sport. Within these cells and from these energy sources adenosine triphosphate atp is formed to provide fuel.

Fat is the most energy dense nutrient utilized during exercise with one gram providing 9 kcal of energy. T or f a calorie is the amount of energy needed to raise the temperature of 1 g of water 1 c. During exercise your body relies on three basic energy systems. Glycogen in the muscle and liver is quickly used during intense exercise.

T or f the products of photosynthesis are the same as the reactants of cellular respiration. During exercise stored fat in the body in the form of triglycerides in adipose or fat tissue is broken down into fatty acids. It is important to remember that all three of these systems contribute to the energy needs of the body during physical activity. Fat as a fuel source for the aerobic energy system.

The body will use fat for energy to conserve its store s glycogen. Although carbohydrate is the body s preferred source of fuel during activity fat also supplies energy. The extent to which these substrates contribute energy for exercise depends on the intensity and duration of exercise the level of exercise training the initial muscle.