To investigate the effects of a stretching program for the muscles of the rib cage or control in patients with COPD during exercise and / or the immediate post-exercise, using the following parameters:
* Tidal volume (VT), respiratory rate (RR), minute volume (MV), inspiratory time (Tins) and expiratory (T exp).
* Change in volumes of total and regional chest magazines (pulmonary rib cage, abdominal rib cage and abdomen).
* Diaphragmatic mobility.
* electrical muscle activity
* endurance time.
* Dyspnea sensation.
