Aubree and Ayla check to see how hard their lungs can push against a pressure sensor, which is essentially a closed tube. As is so often the case, while Ayla's height gives her a larger lung capacity, the more petite Aubree can push harder on the pressure test. Not sure why this is so often, but not always, the case. Both women make several tries each with the lip ring spirometer mouthpiece, as well as with the tuba mouthpiece.

Aubree and Ayla check to see how hard their lungs can push against a pressure sensor, which is essentially a closed tube. As is so often the case, while Ayla's height gives her a larger lung capacity, the more petite Aubree can push harder on the pressure test. Not sure why this is so often, but not always, the case. Both women make several tries each with the lip ring spirometer mouthpiece, as well as with the tuba mouthpiece.