Lung Boost Therapy on Post-mastectomy Postmenopausal

The goal of this randomized controlled trial is to compare the influences of a traditional pulmonary rehabilitation program versus a combined program including the Lung Boost device on pulmonary function and quality of life in women with compromised respiratory function. The study will conducted on 50 female participants aged 50-60 years, including post-unilateral mastectomy and postmenopausal cases. Participants will be randomly assigned into two (2) groups: * Traditional Group (n=25), will receive conventional breathing exercises and the Lung Boost Group (n=25), will receive the same exercises plus Lung Boost respiratory muscle training. * Intervention will last 6 weeks 1 session/ day. Pulmonary function parameters (FVC, FEV1, FEV1/FVC, MVV), and quality of life will be assessed pre- and post-treatment. The main question it aims to answer "Is Lung Boost device has a positive effect on Pulmonary Function in Post-mastectomy Postmenopausal women?" Researchers will compare conventional breathing exercises to Lung Boost respiratory muscle training. to see if Lung Boost device can improve pulmonary function, and quality of life in Post-mastectomy Postmenopausal women.