Which additional response could be measured along with pulse rate during exercise?

Measuring breathing rate alongside pulse rate during exercise provides valuable insight into the body's physiological response to increased physical demands. When a person exercises, their muscles require more oxygen, which leads to an increase in breathing rate to supply this oxygen and expel carbon dioxide. This relationship helps assess how effectively a person's respiratory system is functioning in relation to their heart rate during physical activity.

While monitoring reactivity to sound, skin temperature, or height can provide some information about an individual's condition, they do not directly correlate with the immediate physiological responses related to exercise. Breathing rate is directly influenced by activity level and serves as a critical metric for evaluating respiratory health and endurance during exercise.