A refined technique for determining the respiratory gas exchange responses to anaerobic metabolism during progressive exercise - repeatability in a group of healthy men.

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Wisén, AnitaLund University,Lunds universitet,Människan i rörelse: hälsa och rehabilitering,Forskargrupper vid Lunds universitet,Human Movement: health and rehabilitation,Lund University Research Groups (författare)

A refined technique for determining the respiratory gas exchange responses to anaerobic metabolism during progressive exercise - repeatability in a group of healthy men.

Artikel/kapitelEngelska2004

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Wiley,2004
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LIBRIS-ID:oai:lup.lub.lu.se:de704667-ba6d-4a30-923e-d4fccb8ae0e0
https://lup.lub.lu.se/record/120209URI
https://doi.org/10.1046/j.1475-0961.2003.00522.xDOI

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Språk:engelska
Sammanfattning på:engelska

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The respiratory gas exchange and ventilation during an incremental cycle exercise test were analysed in a group of 19 healthy, moderately fit men. Different computer algorithms were used to estimate the VO2 values where: (i) the rate of VCO2 increase just exceeds the rate of VO2 increase (DX, derivative crossing), (ii) VCO2/VO2 = 1·00 (PX, point of crossing) and (iii) ventilation (VE) increases disproportionately in relation to VCO2 (PQ, point of VCO2 equivalent rise). The DX and PQ measurements were analysed using a new approach employing polynomial regression and the value of PX was determined following low-pass filtration of raw data. The repeatability of the measurements was evaluated with a 5-6 week interval between the tests. The correlations between tests were 0·75 at DX, 0·85 at PX and 0·62 at PQ. The mean differences between the repeated tests were not statistically significant. The repeatability of VO2, in absolute values expressed as ±2 SD of the differences between the tests, had values of 5·0, 6·1 and 9·5 ml min-1 kg-1 for DX, PX and PQ, respectively. The mean value of VO2 for each measurement point expressed as a percentage of VO2max was 54% at DX, 68% at PX and 70% at PQ. The most common sequence of the measured values was DX < PX < PQ, but the sequence DX < PQ < PX was also observed. It is concluded that the gas exchange responses to developing anaerobic metabolism during progressive exercise can be characterized by a series of thresholds. However, the considerable variation in absolute values in the two testing occasions requires further attention.

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Wohlfart, BjörnLund University,Lunds universitet,Klinisk fysiologi, Lund,Sektion V,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Clinical Physiology (Lund),Section V,Department of Clinical Sciences, Lund,Faculty of Medicine(Swepub:lu)klfy-bwo (författare)
Människan i rörelse: hälsa och rehabiliteringForskargrupper vid Lunds universitet (creator_code:org_t)

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Ingår i:Clinical Physiology and Functional Imaging: Wiley24:1, s. 1-91475-09611475-097X

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Clinical Physiology and Functional Imaging (Sök värdpublikationen i LIBRIS)

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Av författaren/redakt...: Wisén, Anita; Wohlfart, Björn

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MEDICIN OCH HÄLSOVETENSKAP: MEDICIN OCH HÄLS ...; och Medicinska och f ...; och Fysiologi

Artiklar i publikationen: Clinical Physiol ...

Av lärosätet: Lunds universitet

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