Of the various types of skeletal muscle fibers, the fibers that experience fatigue sooner are

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Fast glycolytic fibers are the type of skeletal muscle fibers that experience fatigue sooner because they rely heavily on anaerobic glycolysis for energy production, which produces lactic acid as a byproduct. When lactic acid accumulates, it disrupts the pH balance in the muscle cell and leads to fatigue. In contrast, slow oxidative fibers rely mainly on aerobic metabolism for energy production and therefore have better endurance and resistance to fatigue.

Of the Various Types of Skeletal Muscle Fibers, the Fibers