Can investigate into the rate of breathing before and after exercise.

Have the subject sit quietly for a few minutes. Count the number of breaths they take in one minute. Repeat this measurement a few times and calculate the average to get a reliable baseline.

Have the subject engage in a moderate-intensity exercise, such as jogging in place, jumping jacks, or climbing stairs, for a set period (e.g., 3-5 minutes).

Immediately after the exercise, have the subject sit down and count their breaths for one minute. Repeat this measurement a few times as their breathing rate returns to normal, noting the rate immediately after exercise.

Compare the average resting breathing rate with the breathing rate immediately after exercise. You should observe a significant increase in breathing rate after exercise.

The body needs more oxygen during exercise to produce energy, and it also produces more carbon dioxide. Increased breathing rate helps to take in more oxygen and expel more carbon dioxide.