The RQ does can indicate specific substrate use during non-steady-rate physical activity.

Question

Quizplus · Accepted Answer

The Respiratory Quotient (RQ) specifically indicates the type of substrate (carbohydrate, fat) being metabolized for energy, but it is most accurate during steady-state conditions. During non-steady-rate (dynamic) physical activities, the RQ may not accurately reflect substrate use due to the lag in respiratory responses to changes in metabolic demands.

The RQ Does Can Indicate Specific Substrate Use During Non-Steady-Rate