The present study aims to investigate the effects of the 10-Series of Structural Integration on chest wall expansion in patients with stable COPD using a randomized controlled trial design. Participants receiving Structural Integration in addition to conventional pulmonary rehabilitation will be compared with those receiving conventional pulmonary rehabilitation alone. Chest wall expansion will serve as the primary outcome, while pulmonary function, dyspnea, functional exercise capacity, and quality of life may be evaluated as secondary outcomes.