Efficacy of incentive spirometer exercise on pulmonary functions of patients with ankylosing spondylitis stabilized by tumor necrosis factor inhibitor therapy.

Abstract

To evaluate the effect of combining incentive spirometer exercise (ISE) with a conventional exercise (CE) on patients with ankylosing spondylitis (AS) stabilized by tumor necrosis factor (TNF) inhibitor therapy by comparing a combination group with a CE-alone group. Forty-six patients (44 men, 2 women) were randomized to the combination group (ISE plus CE; n=23) or the CE group (n=23). The CE regimen of both groups consisted of 20 exercises performed for 30 min once a day. The ISE was performed once a day for 30 min. The trial duration was 16 weeks. Patients were assessed before and at the end of treatment by measuring the Bath Ankylosing Spondylitis Disease Activity Index, Bath Ankylosing Spondylitis Functional Index (BASFI), chest expansion, finger to floor distance, pulmonary function measures, and 6-min walk distance. Both groups improved significantly in terms of chest expansion (p<0.01), finger to floor distance (p<0.01), and BASFI (p<0.05) after completing the exercise program. However, only the combination group showed significant improvements in the forced vital capacity (p<0.05), total lung capacity (p<0.01), and vital capacity (p<0.05). Although this did not achieve statistical significance, the combination group was mildly superior to the CE-alone group in functional disability and pulmonary function measures. Combining ISE with a CE can provide positive results in patients whose AS has been clinically stabilized by TNF inhibitor therapy.