PLAY
The anion gap is a calculated value derived from electrolyte measurements — specifically sodium minus the sum of chloride and bicarbonate — that reflects the presence of unmeasured anions in the blood. (source) It is a core tool in evaluating acid-base balance and detecting metabolic acidosis, which can arise from conditions ranging from intense exercise to systemic disease.
For performance, the anion gap provides a window into metabolic efficiency and the body's ability to maintain pH homeostasis under load. During high-intensity training, lactate accumulates and can transiently shift the anion gap upward. (source) Chronically elevated anion gap values, however, can indicate persistent metabolic stress, impaired kidney function, or underlying pathology that reduces training adaptability and recovery.
