The Borg scale is used to correlate which two factors under stress?

The Borg scale is a tool used to measure perceived exertion, which refers to how hard a person feels they are working during physical activity. It is particularly useful in correlating heart rate and perceived exertion because it provides a subjective measure that individuals can use to rate their level of exertion on a scale, typically from 6 to 20. As physical activity intensity increases, heart rate rises, and individuals can assess this increase through their personal perception of effort. This subjective assessment can help individuals and trainers gauge the appropriateness of exercise intensity relative to physiological responses.

This scale helps to promote self-awareness and encourages individuals to adjust their exercise intensity based on how they feel, which is vital for improving fitness while managing safety. The other options do not focus on the correlation between perceived exertion and heart rate in the same way, making them less relevant to the primary function of the Borg scale.