They signed a consent form, confidentiality was assured. They assigned into two groups (A) who received inspiratory muscle training in the form of: Inspiratory threshold muscle trainer in addition to traditional chest physical therapy intervention (Deep breath, cough training) while patients in group (B): received traditional chest physical therapy intervention and incentive spirometer, three sessions per week for six weeks. Patients in both groups were assessed before treatment (pre-training) then after treatment (post-training) (after 6 weeks) to measure lung functions using electronic spirometer. The training program was carried in the duration from January 2019 to July 2019.
