Randomized, Controlled Trial: Efficacy of Ultrasound and Exercise in Patients With Ankylosing Spondylitis.

Context: The aim in treating ankylosing spondylitis (AS) is to reduce patients' symptoms, including pain, stiffness, and fatigue; to correct their posture; and to improve their quality of life. Currently, no definitive therapy is available for treating AS. Previous studies have reported positive results regarding the efficacy of exercise.