Lactic Acid Buildup

Definition

The accumulation of lactate in muscles during high-intensity exercise, causing burning sensation and fatigue. The popular myth that it causes DOMS has been thoroughly debunked.

Example Usage

That final set of burpees created massive lactic acid buildup—I could feel the burn for hours.

Origin

Understood scientifically since the 1800s; became popular fitness terminology in the 20th century.

Fun Fact

Lactate is actually cleared from muscles within minutes of exercise; the 'burn' during exercise is caused by hydrogen ions, not lactate itself.

Source: Exercise Physiology, sports medicine research

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