Question

During moderate aerobic exercise, which respiratory variable increases the most?

a. tidal volume
b. breathing rate
c. total lung capacity
d. inspiratory reserve

Answer 1

During moderate aerobic exercise, the respiratory variable that increases the most is the breathing rate.

Step-by-step explanation:

During moderate aerobic exercise, the respiratory variable that increases the most is the breathing rate. The tidal volume refers to the amount of air that enters the lungs during quiet breathing, while the inspiratory reserve volume is the extra volume of air that can be brought into the lungs during a forced inspiration. The total lung capacity is the sum of the residual volume, expiratory reserve volume, tidal volume, and inspiratory reserve volume. However, during moderate aerobic exercise, the primary change is an increase in the rate of breathing, which results in a higher breathing rate.