Breathing Calibration Tutorial

The breathing calibration is the simplest of the activity types. Just stand up straight and inhale as deeply as you can followed by exhaling as sharply as you can three times. This is an easy way for us to get a baseline reading of your shirt and determine if the fit is good. We can also extract a metric that can be insightful to track over time, namely the forced expiratory volume in 1 second (FEV1). This is the maximum amount of air the user can exhale in 1 second.