Magnetic Stimulation of Diaphragm in Chronic Obstructive Pulmonary Disease

Inclusion Criteria: 1. Having been diagnosed with COPD at least 6 months ago 2. Being over 18 years of age 3. Having the cognitive ability to understand the questions and fill out the questionnaires 4. Agreeing to participate in the study Exclusion Criteria: 1. Presence of chest wall deformity 2. Presence of pacemaker/defibrillator 3. Pregnancy 4. Presence of acute respiratory tract infection and/or pneumonia 5. Suspicion of underlying hemidiaphragmatic paresis (defined as elevation of one hemidiaphragm \>2.5 cm compared to the other on chest radiography) 6. Known history of inflammatory rheumatologic or neuromuscular disease that may affect the mechanics of the diaphragm (cerebrovascular accident, spinal cord injury, epilepsy, peripheral neuropathy, and muscle diseases, etc.) 7. Suspected paraneoplastic or myopathic syndromes and/or use of medications known to alter muscle structure and/or function, including oral corticosteroids 8. History of recent thoracic and/or abdominal surgery 9. History of COPD exacerbation within the last 4 weeks 10. COPD disease is accompanied by bronchial asthma, interstitial lung diseases, lung neoplasia, metabolic diseases (diabetes mellitus, uremia and liver failure) 11. Body mass index greater than 40 12. Presence of contraindications for exercise program (uncontrolled atrial/ventricular arrhythmia, resting systolic blood pressure ≥ 200 mm Hg or diastolic blood pressure ≥ 110 mm Hg, severe aortic stenosis, recent history of embolism, decompensated heart failure, cardiac ischemic event within the last four weeks) 13. Presence of systemic disease and/or musculoskeletal disease that may prevent exercise