If an athlete experiences intense muscle fatigue during a sprint due to sustained anaerobic glycolysis, which failure mode becomes most likely in the muscle fibers?

💡 Explanation

Sustained anaerobic glycolysis leads to lactate accumulation and decreased pH. This increased acidity inhibits actin-myosin cross-bridge cycling because it interferes with the binding affinity of calcium to troponin, therefore impairing muscle contraction, rather than enhancing performance.

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