Effect of Visual Feedback From the SpiroGym Mobile Application

"Participants will performe an expiratory muscle training using an Expiratory Muscle Trainer (EMST150; Aspire Products, LLC, United States). Participants will be instructed to perform five sets of five forceful expirations coupled with SpiroGym app.~The SpiroGym app video feedback: During a correct performance of the expiratory manoeuvre with the expiratory handheld device, the exhalation valve opens, and the air flow increases the sound level detected by the microphone. Simultaneously, the application gives visual feedback on the mobile phone screen in real time using a curve depicting the current sound level, and the task of the patient is to keep the curve in the training zone depicted by two lines corresponding to the low and high level, respectively."

Participants will performe an expiratory muscle training using an Expiratory Muscle Trainer (EMST150; Aspire Products, LLC, United States) without video feedback . Participants will be instructed to perform five sets of five forceful expirations.