There is a modified RPE scale called the Borg Category Ratio Scale (CR10) that accounts for this. The CR10 is similar to the original scale but also considers a person’s perceived level of pain.

Of the two, Taguchi prefers to use the modified RPE scale: "It’s more intuitive," she says. It's also a little simpler to use because it doesn't rely on any metrics. By comparison, the Borg ...

For example, if you’re running up a hill for 30 seconds and it feels like an 11 on the Borg scale, your heart rate should be 110 bpm. Barrett says the modified RPE scale allows for daily changes ...

[1] The modified Borg scale is a 10-point scale with descriptors anchoring the ends and specific numbers listed within the scale; it provides a valid and reliable alternative for evaluation of ...

We compared the amount of time per floor travelled by stairs and by two banks of elevators. Participants reported their fatigue levels using a modified Borg scale. We performed two-way analysis of ...