*Ankylosing spondylitis* (AS) is an inflammatory disease that causes pain and stiffness in the spine, pelvis, and other joints, like the hips, knees, feet, and shoulders. AS is a chronic (lifelong) disease, and it is hereditary. Although a majority of people who have AS carry a gene called HLA-B27. *How Can a Physical Therapist Help?* Physical therapy will help improve…