title: Exhalation time characterizing exhaustion while wearing respiratory protective masks.
mesh_terms: D005221:Fatigue / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008397:Masks; D005082:Physical Exertion; D011482:Protective Devices; D012119:Respiration; D012129:Respiratory Function Tests; D013997:Time Factors