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Fatigue, Part 2 – The Anaerobic Alactic Energy System

Information presented in the first section on fatigue during exercise (Part 1 Fatigue-Energetics) pointed out the importance of beginning every discussion on energy system metabolism with knowledge of adenosine triphosphate (ATP) and its role in muscle contraction.  Humans have evolved using three metabolic energy systems for their daily activities which may range from lifting a…