A randomized, controlled, single-blind, prospective trial being conducted involving 54 patients with ankylosing spondylitis, selected from outpatient clinics - UNIFESP. They will be randomized in intervention group (n = 27) conduct training for muscle strengthening with the aid of the Swiss ball and in the control group (n = 27) did not undergo any intervention. Eight exercises will be conducted with intent to engage all muscle groups.
The aim of the present study is to assess the effectiveness of resistance training with swiss ball in the treatment of patients with ankylosing spondylitis.