Biochemistry of exercise-induced metabolic acidosis.
Level 5 - mechanism / opinion, no new human data
Narrative review and mechanistic biochemical reasoning with no primary empirical human data.
PubMed 15308499 · doi:10.1152/ajpregu.00114.2004
What was done
Narrative review evaluating the biochemical mechanisms underlying exercise-induced metabolic acidosis and the physiological role of lactate production during intense exercise.
What was found
The abstract reports no numerical values. It describes that proton accumulation and acidosis result from non-mitochondrial ATP hydrolysis when exercise intensity exceeds steady state, whereas lactate production consumes protons, retards acidosis, and acts only as an indirect marker of metabolic stress.
Why it matters
It challenges the classic concept of lactic acidosis by clarifying that lactate production counteracts rather than causes exercise-induced acidosis.
Limits
Narrative review relying on theoretical biochemical mechanisms without new experimental data, statistical tests, or reported sample sizes in the abstract.
Cited by
- supports The burning sensation experienced in muscles during intense exercise is caused by hydrogen ions rather than lactate.