Glycolysis is both the Anaerobic and Aerobic System

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The energy system that is able to generate ATP without oxygen is called the anaerobic system. Anaerobic meaning without oxygen. This system is formed from the combination of ATP and lactic acid. The metabolic pathway of the anaerobic system is called anaerobic glycolysis. Glucose is broken down during the metabolic pathway glycolysis, with or without oxygen present. Carbohydrates are the only macronutrient that can be catabolized during glycolysis. Uniquely, glycolysis is both anaerobic and aerobic. The end product pyruvate, from glycolysis, is anabolized to lactic acid when there is a need for energy without an adequate supply of oxygen available. This last step or reaction enables glycolysis to continue producing ATP without the need for oxygen, which is why it is called the anaerobic energy system (Fink, 2009). ATP is used in all three systems, phosphagen, anaerobic, and aerobic as the primary energy source. How ATP is processed, used and renewed will depend on the speed, intensity and duration in contractions of our muscles. Anaerobic is the main training for athletes in strength and endurance sports. The ATP-PC (adenosine triphosphate phosphocreatine) and the lactic acid systems are the two main energy chains comprised for these events. During intense activites, anaerobic energy is the major contributor for 1 to 3 minutes. Because of intense muscle contractions, there is a limited oxygen supply from the constricted blood vessels. At the start of an activity during
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