# Exogenous carbohydrate oxidation

Exogenous carbohydrate oxidation is how much of the carbohydrate you eat or drink during exercise is burned for fuel, measured with tracers in research.

It is separate from carbohydrate already stored in muscle as glycogen. In hot conditions, oxidation of ingested carbohydrate can fall even when total carbohydrate use stays similar, so the body may lean more on stored glycogen.

Also called: Exogenous CHO oxidation.

Related: [Macronutrients](https://revns.com/dictionary/macronutrients.md), [Electrolytes](https://revns.com/dictionary/electrolytes.md), [Hydration](https://revns.com/dictionary/hydration.md)

---

Canonical: https://revns.com/dictionary/exogenous-carbohydrate-oxidation
Index of everything: https://revns.com/llms.txt
revns gives training guidance, not medical advice.