What does the acronym RPE stand for?

• A. Rate of Physical Exertion
• B. Respiratory Perceived Effort
• C. Rating of Perceived Exertion
• D. Rapid Physical Exertion

Answer: (C)

RPE stands for Rating of Perceived Exertion. The main idea is that it’s a subjective measure of how hard you feel you’re working during exercise, not an objective count like reps or a blood test. The “rating” part signals that the person assigns a number to their effort, and “perceived exertion” captures the overall sense of effort, effort level, and fatigue across body systems (breathing, heart, muscles). This is why it’s the best choice: it directly communicates the athlete’s own experience of intensity, which can vary widely between individuals and even within the same person across days. In practice, you can use a Borg-style scale (such as 6–20 or 0–10) to guide intensity in a class, helping tailor effort safely and effectively without needing heart-rate data. The other options mix up concepts—Rate implies a different measurement, Respiratory Perceived Effort narrows to breathing, and Rapid Physical Exertion suggests speed rather than a measured effort—so they don’t describe the standard term used in fitness programming.