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Exercise physiology In this assignment I will list, describe and compare the fuels used and the mechanisms and training adaptations of the aerobic energy system and anaerobic energy system. Energy can take a number of forms, such as: * Chemical * Electrical * Electromagnetic * Thermal * Mechanical * Nuclear Foods are composed primarily of carbon, hydrogen, oxygen and in the case of protein, nitrogen. Molecular bonds in foods are relatively weak and provide very little energy when broken. Consequently, food is not directly for cellular operations. Rather, the energy in food molecules bonds are chemically released within our cells then stored in the form of high energy compound called 'adenosine triphosphate' (ATP). At rest, the energy that your body needs is derived almost equally from the breakdown of carbohydrates and fats. Proteins are your body's building blocks, usually providing little energy for cellular function. During mild to severe effort, more carbohydrates is used, with less reliance on...

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