010-111 · Question #297
What is the purpose of the Borg Scale of Perceived Exertion?
The correct answer is B. To estimate the level of fatigue during exercise. The Borg Rating of Perceived Exertion (RPE) scale is a psychophysiological tool used to quantify how hard a person feels they are working during exercise. It correlates subjective effort with physiological strain.
Question
What is the purpose of the Borg Scale of Perceived Exertion?
Options
- ATo estimate oxygen consumption during exercise.
- BTo estimate the level of fatigue during exercise.
- CTo estimate systolic and diastolic blood pressure during exercise.
- DTo estimate subject's immediate intrinsic motivation during exercise.
How the community answered
(27 responses)- A4% (1)
- B85% (23)
- C4% (1)
- D7% (2)
Why each option
The Borg Rating of Perceived Exertion (RPE) scale is a psychophysiological tool used to quantify how hard a person feels they are working during exercise. It correlates subjective effort with physiological strain.
Oxygen consumption (VO2) is measured through metabolic testing equipment, not a perceived exertion scale.
The Borg Scale, developed by Gunnar Borg, measures an individual's subjective perception of physical exertion and fatigue during exercise, typically on a scale of 6-20. It allows exercisers and trainers to gauge exercise intensity without direct physiological measurements, and RPE scores correlate closely with heart rate and overall physiological load.
Blood pressure is measured with a sphygmomanometer and cannot be estimated through subjective perception ratings.
Intrinsic motivation is a psychological construct measured by tools such as the Intrinsic Motivation Inventory, not the Borg Scale.
Concept tested: Borg RPE scale purpose and application
Source: https://www.acsm.org/docs/default-source/files-for-resource-library/perceived-exertion.pdf
Topics
Community Discussion
4
Marisol P.Dec 14, 2025The correct answer is B. The Borg Scale of Perceived Exertion (RPE) is a psychophysical tool that allows a subject to rate how hard the exercise feels overall, capturing the integrated sense of effort, strain, and fatigue across respiratory, cardiovascular, and musculoskeletal systems, which is why it tracks fatigue/exertion rather than serving as a direct physiological measure like VO2 or blood pressure.
Anjali D.Dec 6, 2025B is the one, and honestly this question tripped up a few people in our group at first because A sounds tempting if you have not spent time with the scale itself. The Borg Scale is purely subjective, it asks the exercising person to rate how hard the effort feels, anywhere from very light to maximal exertion, and that rating correlates with perceived fatigue, not with any direct physiological measurement like VO2 or blood pressure. The key word to hold onto is "perceived," which immediately rules out A and C since those require actual instruments or calculations. D is the odd one out for obvious reasons, motivation is a psychology construct and the Borg Scale was never designed for that. When I saw this on my actual exam I almost second-guessed myself because the phrase "estimate" in option A made it sound plausible, like maybe you could back-calculate something from the RPE number. I sat with it for about ten seconds, reminded myself that Borg = effort as the person feels it, nothing more, and went with B without looking back. Has anyone else run into this one or a close variant? Would love to know if the wording differed on your version.
Ingrid P.Dec 23, 2025I initially leaned toward A because the Borg Scale gets used alongside VO2 max testing so often that the two felt linked in my head, but then I remembered that perceived exertion is literally what the subject reports feeling, which is fatigue and effort, not a physiological measurement of oxygen. B is the card to make here, and the cue I use is "Borg = how hard it FEELS," full stop.
Marisol P.Dec 24, 2025Solid instinct, and worth adding that the 6-20 scale was deliberately anchored to heart rate (multiply the rating by 10 to approximate BPM), so there is a physiological scaffold underneath the subjective report, even if RPE itself remains a perceptual variable.