Study participants will be randomly assigned to one of two groups: the experimental group with high resistance EMT and the control group with low resistance EMT. The participants will be randomized to the two groups by an independent staff member at the time of enrollment based on the medical record number. Both groups will undergo IMT because IMT has been found to be effective improving MIP as well as FEV1 and FVC. The patients and those reading the pulmonary function tests will be blinded to the group assignment of each participant.