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A COMPARISON OF THE RESPIRATORY WORK DONE AGAINST AN EXTERNAL RESISTANCE BY MAN AND BY A SINE‐WAVE PUMP
Author(s) -
Cooper E. A.
Publication year - 1960
Publication title -
quarterly journal of experimental physiology and cognate medical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 101
eISSN - 1469-445X
pISSN - 0033-5541
DOI - 10.1113/expphysiol.1960.sp001456
Subject(s) - sine wave , exertion , work (physics) , respiratory system , respiratory rate , respiratory minute volume , volume (thermodynamics) , medicine , mechanics , mathematics , physics , cardiology , electrical engineering , blood pressure , heart rate , engineering , voltage , thermodynamics
The rate of external work done against the resistance of a respiratory circuit was measured from pressure‐volume diagrams. Eight subjects breathed through the circuit at many levels of exertion. At any given minute volume the rates of external respiratory work were similar for all subjects. The circuit was also ventilated by a sine‐wave pump at corresponding minute volumes. The rate of work done by the pump at all minute volumes corresponding to exercising men was also similar. It was, therefore, concluded that in estimations of the rate of respiratory work on exercise, it is justifiable to assume that the human respiratory wave behaves as a sine wave.