Question

during cardiovascular exercise, what does the target heart rate (thr) represent?
o the minimum heart rate that should be achieved to ensure the body is at rest
o the maximum heart rate (mhr) that the body can achieve during peak physical exertion
o the heart rate at which the body begins to fatigue, and exercise should be stopped
o the heart rate that should be maintained for improving cardiovascular fitness during exercise

Explanation:

The target heart rate (THR) during cardiovascular exercise is the heart - rate range that should be maintained to get the most out of the exercise and improve cardiovascular fitness. It is not related to the resting heart rate, maximum heart rate during peak exertion, or the rate at which fatigue starts.

Answer:

the heart rate that should be maintained for improving cardiovascular fitness during exercise