Individual measurements reported to the class 1. Work in pairs to obtain the following measurements for each of you. In a sitting relaxed posture, have a partner count for you how many times you breathe per minute. Make at least three measurements. Report the average.
Tidal volume is the amount of air entering or leaving the lungs in a normal breath.
Using the graduated plastic bag, individual cardboard expiration tube, and rubber band provided, exhale three normal breaths into the bag. Divide by three to get your average tidal volume. Vital capacity is the maximum volume of air that can move out of the lungs after a person inhales as deeply as possible. Take a deep breath and exhale completely into the plastic bag. After each reading, empty the bag completely.