Artefactual Incidence of V̇O2 Plateau and V̇O2max in Historical Studies: Time to Move on

Rachel Barr, C. C. T. Clark, Jo Corbett, Stephen Draper

    Research output: Contribution to journalJournal Article

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    Abstract

    Purpose: Contemporary understanding of the time course of oxygen uptake suggests that traditional discontinuous tests are of insufficient duration to elicit a fully developed V˙O2response. However, this remains to be empirically demonstrated. Thus, the aims of the present study were: (1) to investigate whether early V˙O2maxassessments underestimated actual V˙O2, and (2) to investigate whether the apparent V˙O2plateau observed in classic studies was an artefact of measuring in a non-steady state. Summary of facts and results: Twelve males (age 28 ± 7 y, 1.78 ± 0.05 m, 80 ± 11 kg) each completed a constant speed discontinuous test. The study design replicated the increasing gradient discontinuous test used by Tayloret al. (1955). V˙O2data were averaged during the 1.75–2.75 min V˙O2.Taylortime point and the final minute of each test V˙O2.Final. A paired samples t-test was used to evaluate differences in V˙O2peak.Taylorand V˙O2peak.Final. The V˙O2peak.Finalwas found to be significantly higher than V˙O2peak.Taylor(P <0.001, d = 1.18). The slope of the V˙O2response, calculated from the last completed gradient for each participant was significantly different from zero during the 1.75–2.75 min (Taylor: P = 0.009, d = 1.58; final: P = 0.02, d = 0.29). Conclusion: V˙O2plateau in historical studies was artefactual. Further investigation, without the fallacious assumptions of historical studies, may enable exercise physiologists and practitioners to determine which combination of exercise protocol and method of data acquisition is most conducive to elicit and detect a V˙O2plateau.
    Original languageEnglish
    Pages (from-to)e129-e132
    Number of pages9
    JournalScience and Sports
    Volume33
    Issue number3
    Early online date13 Mar 2018
    DOIs
    Publication statusPublished - 1 Jun 2018

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    Artifacts
    Oxygen
    Incidence

    Keywords

    • Discontinuous
    • Maximal
    • Measurement
    • Oxygen uptake
    • Plateau

    Cite this

    Barr, Rachel ; Clark, C. C. T. ; Corbett, Jo ; Draper, Stephen. / Artefactual Incidence of V̇O2 Plateau and V̇O2max in Historical Studies: Time to Move on. In: Science and Sports. 2018 ; Vol. 33, No. 3. pp. e129-e132.
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    title = "Artefactual Incidence of V̇O2 Plateau and V̇O2max in Historical Studies: Time to Move on",
    abstract = "Purpose: Contemporary understanding of the time course of oxygen uptake suggests that traditional discontinuous tests are of insufficient duration to elicit a fully developed V˙O2response. However, this remains to be empirically demonstrated. Thus, the aims of the present study were: (1) to investigate whether early V˙O2maxassessments underestimated actual V˙O2, and (2) to investigate whether the apparent V˙O2plateau observed in classic studies was an artefact of measuring in a non-steady state. Summary of facts and results: Twelve males (age 28 ± 7 y, 1.78 ± 0.05 m, 80 ± 11 kg) each completed a constant speed discontinuous test. The study design replicated the increasing gradient discontinuous test used by Tayloret al. (1955). V˙O2data were averaged during the 1.75–2.75 min V˙O2.Taylortime point and the final minute of each test V˙O2.Final. A paired samples t-test was used to evaluate differences in V˙O2peak.Taylorand V˙O2peak.Final. The V˙O2peak.Finalwas found to be significantly higher than V˙O2peak.Taylor(P <0.001, d = 1.18). The slope of the V˙O2response, calculated from the last completed gradient for each participant was significantly different from zero during the 1.75–2.75 min (Taylor: P = 0.009, d = 1.58; final: P = 0.02, d = 0.29). Conclusion: V˙O2plateau in historical studies was artefactual. Further investigation, without the fallacious assumptions of historical studies, may enable exercise physiologists and practitioners to determine which combination of exercise protocol and method of data acquisition is most conducive to elicit and detect a V˙O2plateau.",
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    Artefactual Incidence of V̇O2 Plateau and V̇O2max in Historical Studies: Time to Move on. / Barr, Rachel; Clark, C. C. T.; Corbett, Jo; Draper, Stephen.

    In: Science and Sports, Vol. 33, No. 3, 01.06.2018, p. e129-e132.

    Research output: Contribution to journalJournal Article

    TY - JOUR

    T1 - Artefactual Incidence of V̇O2 Plateau and V̇O2max in Historical Studies: Time to Move on

    AU - Barr, Rachel

    AU - Clark, C. C. T.

    AU - Corbett, Jo

    AU - Draper, Stephen

    PY - 2018/6/1

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    N2 - Purpose: Contemporary understanding of the time course of oxygen uptake suggests that traditional discontinuous tests are of insufficient duration to elicit a fully developed V˙O2response. However, this remains to be empirically demonstrated. Thus, the aims of the present study were: (1) to investigate whether early V˙O2maxassessments underestimated actual V˙O2, and (2) to investigate whether the apparent V˙O2plateau observed in classic studies was an artefact of measuring in a non-steady state. Summary of facts and results: Twelve males (age 28 ± 7 y, 1.78 ± 0.05 m, 80 ± 11 kg) each completed a constant speed discontinuous test. The study design replicated the increasing gradient discontinuous test used by Tayloret al. (1955). V˙O2data were averaged during the 1.75–2.75 min V˙O2.Taylortime point and the final minute of each test V˙O2.Final. A paired samples t-test was used to evaluate differences in V˙O2peak.Taylorand V˙O2peak.Final. The V˙O2peak.Finalwas found to be significantly higher than V˙O2peak.Taylor(P <0.001, d = 1.18). The slope of the V˙O2response, calculated from the last completed gradient for each participant was significantly different from zero during the 1.75–2.75 min (Taylor: P = 0.009, d = 1.58; final: P = 0.02, d = 0.29). Conclusion: V˙O2plateau in historical studies was artefactual. Further investigation, without the fallacious assumptions of historical studies, may enable exercise physiologists and practitioners to determine which combination of exercise protocol and method of data acquisition is most conducive to elicit and detect a V˙O2plateau.

    AB - Purpose: Contemporary understanding of the time course of oxygen uptake suggests that traditional discontinuous tests are of insufficient duration to elicit a fully developed V˙O2response. However, this remains to be empirically demonstrated. Thus, the aims of the present study were: (1) to investigate whether early V˙O2maxassessments underestimated actual V˙O2, and (2) to investigate whether the apparent V˙O2plateau observed in classic studies was an artefact of measuring in a non-steady state. Summary of facts and results: Twelve males (age 28 ± 7 y, 1.78 ± 0.05 m, 80 ± 11 kg) each completed a constant speed discontinuous test. The study design replicated the increasing gradient discontinuous test used by Tayloret al. (1955). V˙O2data were averaged during the 1.75–2.75 min V˙O2.Taylortime point and the final minute of each test V˙O2.Final. A paired samples t-test was used to evaluate differences in V˙O2peak.Taylorand V˙O2peak.Final. The V˙O2peak.Finalwas found to be significantly higher than V˙O2peak.Taylor(P <0.001, d = 1.18). The slope of the V˙O2response, calculated from the last completed gradient for each participant was significantly different from zero during the 1.75–2.75 min (Taylor: P = 0.009, d = 1.58; final: P = 0.02, d = 0.29). Conclusion: V˙O2plateau in historical studies was artefactual. Further investigation, without the fallacious assumptions of historical studies, may enable exercise physiologists and practitioners to determine which combination of exercise protocol and method of data acquisition is most conducive to elicit and detect a V˙O2plateau.

    KW - Discontinuous

    KW - Maximal

    KW - Measurement

    KW - Oxygen uptake

    KW - Plateau

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    DO - 10.1016/j.scispo.2018.01.004

    M3 - Journal Article

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