During activities ranging from rest to moderate aerobic activity, the RQ always reflects the oxidation of pure carbohydrate or pure fat.

Question

Quizplus · Accepted Answer

The Respiratory Quotient (RQ) varies depending on the mix of fuels (carbohydrates, fats, and sometimes proteins) being metabolized, not just pure carbohydrate or pure fat. It ranges from about 0.7 (fat oxidation) to 1.0 (carbohydrate oxidation), with mixed diets typically resulting in an RQ between these values.

During Activities Ranging from Rest to Moderate Aerobic Activity, the RQ