Ankylosing spondylitis is an autoimmune disease that primarily affects the axial joints and currently has no curative treatment. Its treatment includes general measures, medication, and surgery. General measures mainly involve abstaining from alcohol, quitting smoking, avoiding carbonated drinks and coffee, which can lead to osteoporosis. In addition, it is important to focus on exercise; functional exercises are a crucial part of its treatment. Regular activities such as swimming, walking, and running are recommended, and chest-expanding exercises can improve muscle rigidity. Moreover, it is advisable to sleep on a hard bed to keep the spine level. Swimming is the best form of exercise for patients with ankylosing spondylitis as it does not overload the joints while also enhancing the coordination and flexibility of the limb muscles.