Why does prolonged high-intensity exercise, like sprinting, result in muscle fatigue associated with burning sensations?

💡 Explanation

Muscle fatigue occurs due to anaerobic metabolism during high-intensity exercise, producing lactate. When lactate production exceeds the body's clearance capacity, it accumulates, leading to increased acidity and burning sensations. Therefore, lactate accumulation is the mechanism responsible, rather than decreased oxygen directly inhibiting glycogenolysis.

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