Patients in the control group will receive a booklet with general information on a health education program where they will be taught global stretching exercises to be performed themselves at least twice a week at home for 20 minutes. In addition, hygienic postural care will be included.

People will receive a three times-weekly 60 min pulmonary rehabilitation program (PRP) for 8 weeks. Exercise training will be structured in three stages. Exercise will start with a warm-up period (4 minutes); followed by the core phase of aerobic exercises (15-18 minutes), upper and lower limb strength (9 minutes), exercises of the respiratory muscles with diaphragmatic breaths with retentions (10 minutes) and the final cooling-stretching (4 minutes) for a total 45 min, coupled with 15 minutes of breathing retraining with the Threshold Inspiratory Muscle Training® (IMT) device (Philips Respironics). Respiratory muscle training will start at 10% of the initial MIP achieved at startup and will increase by 5% every two weeks until reaching 20% of the initial MIP. The intensity of the exercise training will be at 60-75% of the maximum heart rate rate achieved in the exercise capacity test.

Patients will receive a pulmonary rehabilitation program (PRP) supplemented with pulsed electromagnetic field therapy. The latter will be applied for 5 weeks, a total of 3 sessions per week. The BTL-6000 Super Inductive System (SIS) will be used with the 'focus field' type manual applicator. The parameters will be: intensity of the magnetic field up to 2.5 Tesla (T), the frequency range to achieve the analgesic effect will vary between 10-20 Hz and, finally, an adjustable relative intensity up to 100%, depending on the perception subjective of the patients. Sessions will last 10 minutes. The parameters and procedure of therapy follow the manufacturer's recommendations. The SIS will be applied in the area where the patient presents the highest level of pain.

Pulsed electromagnetic field therapy is an innovative therapy. The technology is based on a high intensity electromagnetic field, which positively influences human tissue. It is a form of non-invasive treatment, with good tolerance by patients. High-intensity electromagnetic fields excite neural and muscle cells, which stimulates the human body.

Pulmonary function test will be performed using the spirometry equipment Spiro USB MicroMedical® model according to the Guidelines of American Thoracic Society and the European Respiratory Society. Forced expiratory volume in the first second of expiration (FEV₁): volume of air expired during the first second of forced expiration after maximum inspiration. The normal value is ≥ 80%.

Pulmonary function test will be performed using the spirometry equipment Spiro USB MicroMedical® model according to the Guidelines of American Thoracic Society and the European Respiratory Society. Forced vital capacity (FVC): It is expressed as a volume (in ml) and is considered normal when it is greater than 80% of its theoretical value.

Pulmonary function test will be performed using the spirometry equipment Spiro USB MicroMedical® model according to the Guidelines of American Thoracic Society and the European Respiratory Society. FEV₁ / FVC index: it is the proportion of the forced vital capacity that an individual exhales in the first second of forced expiration. It must be greater than 75%, although values of up to 70% are accepted.

Change in respiratoy muscle function strength will be measured with the MicroRPM® model meter with the participant in sitting. Respiratory pressures will be measured maximum statics following SEPAR recommendations.

Weight will be measured with a clinical scale (SECA 665, Seca) with a sensitivity of 0.25 k, without shoes, calibrated frequently to 0 g to avoid weight errors. the weight will be expressed in Kg. Height will be calculated with a measuring rod (Holtain Limited) and it will be expressed in m^2. Once the weight and height have been obtained, the BMI will be calculated, which will be expressed in Kg/m^2.