Inclusion Criteria:  Have been diagnosed with Parkinson's disease Volunteering to participate in the study  Exclusion Criteria:  Those with COVID-19 Diseases that increase intra-abdominal pressure Diseases affecting diaphragmatic motility Those who had a recent thoracic or abdominal operation Those who have a parenchymal, pleural or chest wall mass that will cause restriction on a recent chest X-ray or CT will not be included in the study