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- Schoffelen, Paul F. M.Maastricht Univ, Med Ctr, NUTRIM Sch Nutr Toxicol & Metab, Dept Human Biol, Maastricht, Netherlands;Maastricht Univ, Med Ctr, NUTRIM Sch Nutr Toxicol & Metab, Dept Nutr & Movement Sci, Maastricht, Netherlands (author)
Test-retest variability of VO2max using total-capture indirect calorimetry reveals linear relationship of VO2 and Power
- Article/chapterEnglish2019
Publisher, publication year, extent ...
- 2018-11-12
- Wiley,2019
- electronicrdacarrier
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- LIBRIS-ID:oai:DiVA.org:uu-375802
- https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-375802URI
- https://doi.org/10.1111/sms.13324DOI
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- Language:English
- Summary in:English
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- This study aimed to analyze the intra-individual variation in VO2max of human subjects using total-capture and free-flow indirect calorimetry. Twenty-seven men (27 ± 5 year; VO2max 49-79 mL•kg-1 •min-1) performed two maximal exertion tests (CPETs) on a cycle ergometer, separated by a 7 ± 2 day interval. VO2 and VCO2 were assessed using an indirect calorimeter (Omnical) with total capture of exhalation in a free-flow airstream. Thirteen subjects performed a third maximal exertion test using a breath-by-breath calorimeter (Oxycon Pro). On-site validation was deemed a requirement. For the Omnical, the mean within-subject CV for VO2max was 1.2 ± 0.9% (0.0%-4.4%) and for ergometer workload P max 1.3 ± 1.3% (0%-4.6%). VO2max values with the Oxycon Pro were significantly lower in comparison with Omnical (P< t 0.001; t test) with mean 3570 vs 4061 and difference SD 361 mL • min-1. Validation results for the Omnical with methanol combustion were -0.05 ± 0.70% (mean ± SD; n = 31) at the 225 mL • min-1 VO2 level and -0.23 ± 0.80% (n = 31) at the 150 mL • min-1 VCO2 level. Results using gas infusion were 0.04 ± 0.75% (n = 34) and -0.99 ± 1.05% (n = 24) over the respective 500-6000 mL • min-1 VO2 and VCO2 ranges. Validation results for the Oxycon Pro in breath-by-breath mode were - 2.2 ± 1.6% (n = 12) for VO2 and 5.7 ± 3.3% (n = 12) for VCO2 over the 1000-4000 mL •min-1 range. On a Visual analog scale, participants reported improved breathing using the free-flow indirect calorimetry (score 7.6 ± 1.2 vs 5.1 ± 2.7, P = 0.008). We conclude that total capturing free-flow indirect calorimetry is suitable for measuring VO2 even with the highest range. VO2max was linear with the incline in P max over the full range.
Subject headings and genre
- MEDICIN OCH HÄLSOVETENSKAP Hälsovetenskap Idrottsvetenskap hsv//swe
- MEDICAL AND HEALTH SCIENCES Health Sciences Sport and Fitness Sciences hsv//eng
- breath-by-breath
- exercise testing
- gas exchange
- intra-individual variability
- validation
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- den Hoed, MarcelUppsala universitet,Medicinsk genetik och genomik,Science for Life Laboratory, SciLifeLab(Swepub:uu)marde358 (author)
- van Breda, EricUniv Antwerp, Dept Rehabil Sci & Physiotherapy, MOVANT, Fac Med & Hlth Sci, Antwerp, Belgium (author)
- Plasqui, GuyMaastricht Univ, Med Ctr, NUTRIM Sch Nutr Toxicol & Metab, Dept Nutr & Movement Sci, Maastricht, Netherlands (author)
- Maastricht Univ, Med Ctr, NUTRIM Sch Nutr Toxicol & Metab, Dept Human Biol, Maastricht, Netherlands;Maastricht Univ, Med Ctr, NUTRIM Sch Nutr Toxicol & Metab, Dept Nutr & Movement Sci, Maastricht, NetherlandsMedicinsk genetik och genomik (creator_code:org_t)
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- In:Scandinavian Journal of Medicine and Science in Sports: Wiley29:2, s. 213-2220905-71881600-0838
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