Mechanical Properties of Peripheral and Accessory Respiratory Muscles in Chronic Obstructive Pulmonary Disease Patients

Inclusion Criteria: * Being diagnosed with group C and D COPD according to GOLD staging * Having been using the same medications for the last 4 weeks * No additional comorbid diseases of the orthopedic, neurological or cardiac system Exclusion Criteria: * Presence of another respiratory system disease other than COPD * Patients who have had an acute COPD exacerbation in the last 4 weeks * Patients experiencing COPD exacerbations during the study protocol * Presence of fatty tissue at the measurement points, which may impair the measurement quality. * Have already participated in another clinical trial within the last 30 days that may affect the results of the study. Inclusion Criteria for Healthy Cases * Being over 18 years of age * Not having any diagnosed chronic disease * Not being a smoker