Final answer:
Using a heart rate monitor is an appropriate way for an individual to determine exercise intensity.
Step-by-step explanation:
An appropriate way for an individual to determine exercise intensity is by using a heart rate monitor. It helps measure the heart rate during exercise and provides information about the intensity of the workout. This is useful in determining if the exercise is in the target heart-rate zone, which is important for cardiovascular benefits.
Another method recommended by health professionals is the Talk Test, which is based on the ability to talk but not sing during moderate-intensity aerobic activity, or the inability to say more than a few words without pausing for breath during vigorous-intensity activity.