The RPE chart is as follows ... People doing moderate exercise (like walking or cycling) can generally talk. People doing intense exercise can’t carry on a conversation without taking a breath.

Furthermore, we compared brain activation at different levels of ratings of perceived exertion (RPE) generated during the exercise. Methods Seven healthy adults performed cycling exercise in a novel ...

Methods: Nine pairs of experienced, recreational tandem cyclists rode a tandem or their single bicycle for 5 min at each velocity of 19.3, 22.5, 25.8, and 29.0 kph on a flat, paved surface. Heart rate ...