Oxygen uptake plateau: calculation artifact or physiological reality?
Purpose: To test whether the oxygen uptake ([Formula: see text]) plateau at [Formula: see text] is simply a calculation artifact caused by the variability of [Formula: see text] or a clearly identifiable physiological event.Methods: Forty-six male participants performed an incremental ramp and a [Fo...
| Publicado en: | European Journal of Applied Physiology Vol. 120; no. 1; pp. 231 - 243 |
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| Autores principales: | , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Jan2020
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=141278303&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 141278303 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 14396319 NP8 jtl: European Journal of Applied Physiology issn: 14396319 maglogo: N pubinfo: dt: Jan2020 vid: 120 iid: 1 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 141278303 141278303 NLM31748882 10.1007/s00421-019-04267-7 NLM31748882 141278303 ppf: 231 ppct: 12 formats: tig: atl: Oxygen uptake plateau: calculation artifact or physiological reality? aug: au: Niemeyer, Max Bergmann, Tobias G. J. Beneke, Ralph affil: Abt. Medizin, Training Und Gesundheit, Institut für Sportwissenschaft Und Motologie, Philipps-Universität Marburg, Jahnstr. 12, 35037, Marburg, Germany sug: subj: Physical Fitness Methods Artifacts Exercise Test Methods Oxygen Consumption Adult Physical Fitness Standards Exercise Test Standards Male Adult: 19-44 years Male ab: Purpose: To test whether the oxygen uptake ([Formula: see text]) plateau at [Formula: see text] is simply a calculation artifact caused by the variability of [Formula: see text] or a clearly identifiable physiological event.Methods: Forty-six male participants performed an incremental ramp and a [Formula: see text] verification test. Variability of the difference between adjacent sampling intervals (difference) and of the slope of the [Formula: see text]-workload relationship (slope) in the submaximal intensity domain were calculated. Workload defined sampling intervals used for the calculation of the difference and slope were systematically increased from 20 to 100 W until the expected risk of false plateau diagnoses based on the Gaussian distribution function was lower than 5%. Overall, more than 1500 differences and slopes were analyzed. Subsequently, frequencies of plateau diagnoses in the submaximal and maximal intensity domains were compared.Results: Variability of the difference and slope decreased with increasing sampling interval (p < 0.001). At a sampling interval of 50 W, the predefined acceptable risk of false plateau diagnoses (≤ 5%) was achieved. At this sampling interval, the actual frequency (1.4%) of false-positive plateau diagnoses did not differ from the expected frequency in the submaximal intensity domain (1.6%; p = 0.491). In contrast, the actual frequency at maximal intensity (35.7%) was significantly higher compared to the submaximal intensity domain (p < 0.001) and even higher than the expected frequency of false-positive diagnoses (p < 0.001).Conclusion: The [Formula: see text] plateau at [Formula: see text] represents a physiological event and no calculation artifact caused by [Formula: see text] variability. However, detecting a [Formula: see text] plateau with sufficient certainty requires large sampling intervals. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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