2.3. Maximal Inspiratory Pressure and Perceived Exertion
fatigue
The portable spirometer (K5, Powerbreath, Southam, UK) was used to measure MIP. Participants had to inhale through this device while the resistance gradually increased until they could not overcome it. The MIP on the final successful attempt was recorded. For the evaluation of the perceived exertion and fatigue after the resistive breathing test, the Borg scaling was used [