Inclusion Criteria:  Being diagnosed with mild / moderate COPD by Bolu Abant Izzet Baysal University Faculty of Medicine, Department of Chest Diseases. Mini mental score is 23 or higher Being between the ages of 50-80 Spirometric evaluation result is forced expiratory volume at one second / Forced vital capacity <70% and airflow restriction is 50% forced expiratory volume at one second <80% (expected) degree compared to post-bronchodilator forced expiratory volume at one second. No drug change or antibiotic use due to acute exacerbation for at least three weeks  Exclusion Criteria:  Individuals who need continuous oxygen support Individuals with partial pressure of carbon dioxide≥70 mmHg Having a history of uncontrolled illness that may affect cognitive skills Have uncorrected vision and hearing impairment Having kyphoscoliosis and/or severe postural impairment Having additional risk factors (stroke, neurological disease, dementia, depression, postural hypotension, diaphragm dysfunction)