Therapeutic-rehabilitative interventions supported by music can be considered important resources in many clinical contexts. Some studies report the improvement of psychological (i.e. anxiety) and physiological parameters such for example, dyspnea, blood pressure, quality of life, sleep disturbances, etc. through voice, singing, exercise with wind instruments, and sometimes listening to music. Among the various instruments proposed to support the physical training of COPD patients, music was also tested and, in particular, music as a distracting auditory stimulus (DAS) has been used to increase exercise and physical activity adherence and to reduce the perception of dyspnea in COPD subjects. This randomized controlled trial will compare -in patients with COPD and CRF- the effects of the addiction of music to the training on exercise capacity (possible improvement of endurance and reduction of fatigue and dyspnea) with respect to the usual rehabilitation modality (no music).