title: Diaphragm fatigue and the strategy of breathing in COPD.
mesh_terms: D003964:Diaphragm / Q000503:physiopathology*; D004417:Dyspnea / Q000209:etiology / Q000503:physiopathology; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000503:physiopathology*; D009119:Muscle Contraction; D005082:Physical Exertion; D012119:Respiration; D013997:Time Factors