Acidosis occurs when the pH within muscle fibers decreases, typically due to an accumulation of H⁺ ions, resulting in impaired muscle function and fatigue.

Adenosine triphosphate (ATP) is the primary chemical energy currency of the cell. Hydrolysis of ATP releases the energy used for muscle contraction, ion transport, and most other energy-requiring processes.

Central fatigue is the decline in neural activation of muscles due to changes in the brain and spinal cord, reducing an individual’s ability to sustain forceful contractions.

Excitation-contraction coupling is the process linking a muscle action potential to calcium release and contraction.

Fatigue refers to the reduced capacity of muscles to perform due to prolonged exertion.

Fatigue is the inability to maintain the required or expected power output during physical activity, resulting in a decline in performance.

A metabolic byproduct of anaerobic glycolysis that can be used as an energy source in muscles, the heart, and the liver.

An enzyme that breaks down ATP to provide energy for muscle contraction; its activity is inhibited in acidic conditions.

Peripheral fatigue refers to fatigue that occurs at the muscle level, specifically in the neuromuscular junction or the muscle fibers themselves.

pH is a measure of hydrogen ion (H⁺) concentration, determining how acidic or basic a solution is.

A high-energy compound stored in muscles that provides quick ATP regeneration during the early stages of exercise before aerobic metabolism fully activates.

A structure in muscle cells that stores and releases calcium during muscle contraction.

A protein involved in muscle contraction that binds to calcium ions to allow actin-myosin cross-bridge formation.