Question

during strenuous exersice what does skeletal muscles use ? and what causes the fatigue in the muscle?

Answer 1

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==> It is present in low levels in the muscle . Glycolysis converts glucose to pyruvate , water and NADH , producing two molecules of ATP . Excess pyruvate is converted to lactic acid which causes muscle fatigue .

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Answer 2

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Muscle fatigue has a number of possible causes including impaired blood flow, ion imbalance within the muscle, nervous fatigue, loss of desire to continue, and most importantly, the accumulation of lactic acid in the muscle.