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Muscle fatigue occurs when there is a decline in the availability of ATP, which is essential for muscle contraction and relaxation. As ATP levels drop, the muscle cells struggle to maintain proper function, leading to reduced force generation and endurance. Additionally, the accumulation of metabolic byproducts, such as lactic acid, can further contribute to fatigue. This interplay between ATP depletion and metabolic byproducts ultimately hampers muscle performance.

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1d ago

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