Which method also indicates a subjective level of exercise intensity?

The talk test is a practical method used to assess an individual's subjective level of exercise intensity. It is based on the simple idea that during moderate-intensity exercise, a person should be able to talk but not sing. If the intensity increases to a vigorous level, the individual may find it difficult to carry on a conversation. This subjective assessment allows trainers and exercisers to gauge how hard someone is working based on their ability to communicate comfortably during physical activity. The talk test is particularly beneficial because it doesn't require any specialized equipment and can be easily applied in various settings, making it a valuable tool in personal training.

In contrast, heart rate reserve quantifies exercise intensity objectively by measuring the difference between resting and maximum heart rates. Pulse oximetry is a method for measuring blood oxygen levels, which does not provide subjective insights into perceived exertion. Body mass index is a numerical value derived from weight and height, offering no direct measure of exercise intensity. Thus, the talk test uniquely provides a subjective measure of perceived effort during exercise.