Repeated measurement of the gas exchange threshold: Relative size of measurement and biological variabilities

Alasdair G. Thin, Gabrielle E. Kelly, Leslie Daly, Paul McLoughlin

    Research output: Contribution to journalArticle

    Abstract

    If an individual's gas exchange threshold (GET) is measured on several separate occasions, without a change in aerobic fitness, a random variability will be observed. However, it is not known how much of this variability is biologically determined and how much results from variability in the calibration and measurement processes. The statistical re-sampling technique of Bootstrapping was used to estimate the variability of the GET on a single occasion. This analysis provides the first estimate of the combined contribution of breath-by-breath measurement and calibration processes (6%), to the total between-occasion random variability, leaving biological variability to account for the remainder of the imprecision in the measurement of the GET. © 2004 Elsevier Ltd. All rights reserved.

    Original languageEnglish
    Pages (from-to)703-716
    Number of pages14
    JournalComputers in Biology and Medicine
    Volume35
    Issue number8
    DOIs
    Publication statusPublished - Oct 2005

    Keywords

    • Aerobic fitness
    • Bootstrapping
    • Breath-by-breath
    • Exercise test
    • Gas exchange threshold
    • Limits of repeatability
    • Method variability
    • Reliability
    • Reproducibility

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