Comparison of three field methods for measuring oxygen consumption.

The Oxylog (OX) and the Kofranyi-Michaelis ( KM) field methods for measuring oxygen consumption ( [Vdot]O2) were compared with the conventional Douglas Bag (DB) technique in standardized walking and lifting work in the laboratory. Subjects comprised six men. According to the mean differences in [Vdot]O2 the OX underestimated ( 41% and 6.4% ) and the KM overestimated (3.8% and 0.8% ) [Vdot]O2in walking and lifting work, respectively. The linear regression equations between the DB and the OX as well as between the DB and the KM revealed a good agreement (r= 0.91-0.99) of the [Vdot]O2values. The OX and the KM are accurate for reliable [Vdot]O2measurements under field conditions. Some practical improvements for the OX use, based on several field studies, are recommended.

[1]  M H Harrison,et al.  The 'Oxylog': an evaluation. , 1982, Ergonomics.

[2]  Joseph Rutenfranz,et al.  Habitual physical activity and health , 1978 .

[3]  I A Macdonald,et al.  An evaluation of the Oxylog as a portable device with which to measure oxygen consumption. , 1982, Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics.

[4]  L. Hermansen,et al.  Respiratory and circulatory response to added air flow resistance during exercise. , 1972, Ergonomics.

[5]  J. B. Weir.  New methods for calculating metabolic rate with special reference to protein metabolism , 1949, The Journal of physiology.

[6]  C F Consolazio,et al.  Energy expenditure studies in military populations using Kofranyi-Michaelis respirometers. , 1971, The American journal of clinical nutrition.

[7]  J. Gee,et al.  Effects of external airway obstruction on work capacity and pulmonary gas exchange. , 1968, The American review of respiratory disease.

[8]  A. P. Hollander,et al.  Influence of heavy weight carrying on the cardiorespiratory system during exercise , 2004, European Journal of Applied Physiology and Occupational Physiology.

[9]  J. Kollias,et al.  Effect of respiratory valve dead space on pulmonary ventilation at rest and during exercise. , 1972, Medicine and Science in Sports.