It has been demonstrated that PR and educational therapy optimize respiratory function in COPD patients. Investigators will asses the changes in pulmonary function with Lung Function Tests (LFT): complete spirometry (static and dynamic volumes and Diffusing Capacity of Carbon Oxide) will be performed at T0, T1 e T3 in IC. The CG will be evaluated at T0 and T3 (T1 only if changes in therapy have occurred).