The protocol of the experimental procedure will begin with the explanation of the purpose, risks and benefits of the study volunteers to patients with COPD. Subsequently, based on an evaluation form, will collect data on the past history and current disease and performed a general physical examination. Then the patients will respond to two questionnaires. The first will research the Medical Council (MRC) 13, which is a dyspnea scale to categorize in terms of disability, patients with COPD. The second questionnaire will be the Airway Questionnaire 20 (AQ20) 14 specific for obstructive pulmonary disease, which is validated for the local language and highly reliable for the evaluation of patients with COPD, containing 20 questions related to respiratory health to evaluate the quality of life. Subsequently, the same day, the patients carry out the following tests: spirometry, respiratory muscle strength, respiratory muscle endurance, assessment of training load of the upper and shuttle test and bioimpedance
