Inclusion Criteria:  Patients who are aged between 18-55 years, Patients who got diagnosed according to Modified New York criteria Patients who are being followed at Firat University Department of Rheumatology.  Exclusion Criteria:  Patients who have exercise habits Incooperation Malignancy Pregnancy Patients who have changes of medical treatment in the last 3 months Patients who have another disease that can effect pulmonary functions