The study also proved that there was a significant improvement regarding the pre-training MWR and the MWR 12 weeks later at the end of the training program which could be due to the increase in the strength of respiratory muscles, the decrease in airway resistance and the improvement of the aerobic fitness as it was documented in previous studies [4], [11] and [12]. The results of this research showed the significant improvement of the pre exercise FEV1% of the participants and pointed to the objective improvement of their airway obstruction providing sustained improvement of their pulmonary functions and reducing health care utilization.