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BTEC National Diploma in Sport and Exercise Science Unit 4 Exercise Physiology Assignment 3 Metabolic by- products Lactic acid is the main by- product of anaerobic glycolysis. Blood always contains a small amount of lactic acid. However this increases with high intensity exercise. The pH level of blood decreases. This may affect the muscle and neural functions. The mechanisms of fatigue are: * Onset of Blood Lactate Accumulation (OBLA) OBLA is also known as the anaerobic threshold. Which is the point at which lactate begins to accumulate in the muscles. OBLA is considered to occur at approximately 85% of maximum heart rate. * Excess Post Exercise Oxygen Consumption (EPOC) Oxygen debt is sometimes known as excess post exercise oxygen consumption (EPOC). EPOC refers to the amount of oxygen consumed after exercise in excess of a pre- exercise baseline level. EPOC occurs when a person is exercising at a high intensity where oxygen cannot be supplied to...

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