I'm trying to track down sources of information that offer some values of acceptable variations in oxygen consumption, particularly the on-kinetics. Does anyone have or know of any peer reviewed material?
Kim, I think you need to consider some different aspects, such as: 1) the equipment's variations (source of 'error' that you could seek for reference of those equipments (Myers J. Instrumentation: Equiptment, Calculations, and Validation. In: Washburn RA, editor. Essentials of Cardiopulmonary Exercise Testing. Champaign, IL: Human Kinetics; 1996:59-81); 2) the variability of breath by breath data.
In general, you could wait for 3-5% of variation (considering a good equipment and normal biological flutuations).
Hi Kim,
This is not an easy questions to answer. Generally, variation goes down with exercise intensity. In addition variation seems be slightly lower in well-trained population than in the general population. See also a paper which I have published on the measurement error of PPO and VO2max. Hope this helps
Kim, look at the work by Brian Whipp, Sue Ward and more lately Harry Rossiter (UCLA) they spent a large amount of effort in refining the measurement and analysis of gas kinetics.
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