Ankylosing Spondlitis (AS) is a chronic, rheumatic disease. Foot and ankle involvement may stem from both postural changes in patients seen spinal deformity with the progress of the disease and enthesitis. The purpose of the study is to investigate the relationship plantar pressure distribution and balance, mobility and disease activity in AS patients and to compare AS patients with and without postural changes and healthy subjects.

Ankylosing Spondlitis (AS) is a chronic, rheumatic disease. Reduction in flexibility and mobility is important factors that can cause impairment quality of life, reduction of exercise tolerance and pulmonary capacity with the progression of AS. Extra articular symptoms such as neurologic, cardiovascular and pulmonary involvement affect morbidity and mortality rate. Foot and ankle involvement may stem from both postural changes in patients seen spinal deformity with the progress of the disease and enthesitis. Şahlı et al. concluded that 52% of AS patients had foot involvement but 35% of the patients had symptoms. To be determined plantar pressure distribution is important to be decided body weight distribution, postural control and selection of shoes. The purpose of the study is to investigate the relationship plantar pressure distribution and balance, mobility and disease activity in AS patients and to compare AS patients with and without postural changes and healthy subjects.

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