title: Physiologic advantages of grunting, groaning, and pursed-lip breathing: adaptive symptoms related to the development of continuous positive pressure breathing.
mesh_terms: D000328:Adult; D004417:Dyspnea / Q000503:physiopathology; D005060:Europe; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011018:Pneumonia, Pneumococcal / Q000503:physiopathology; D011175:Positive-Pressure Respiration / Q000266:history*; D014481:United States