Patients will perform daily training consisting of two training sessions of 30 breaths (intensity ~50% of PiMax; 4-5 minutes per session). One session per week will be performed supervised at the research center. IMT will be performed using an electronic tapered flow resistive loading (TFRL) device [POWERbreath®KH1, HaB International Ltd., Southam, UK] for 8 weeks. The PiMax will be measured every week in order to increase the appropriate training intensity to around 50% of the PiMax at that moment. The sham group will perform IMT at an inspiratory load that is not expected to improve inspiratory muscle function (intensity <10% of baseline PiMax; unchanged throughout the protocol).