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Test-retest variabi...
Test-retest variability of VO2max using total-capture indirect calorimetry reveals linear relationship of VO2 and Power
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- Schoffelen, Paul F. M. (författare)
- 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
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- den Hoed, Marcel (författare)
- Uppsala universitet,Medicinsk genetik och genomik,Science for Life Laboratory, SciLifeLab
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- van Breda, Eric (författare)
- Univ Antwerp, Dept Rehabil Sci & Physiotherapy, MOVANT, Fac Med & Hlth Sci, Antwerp, Belgium
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- Plasqui, Guy (författare)
- Maastricht Univ, Med Ctr, NUTRIM Sch Nutr Toxicol & Metab, Dept Nutr & Movement Sci, Maastricht, Netherlands
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(creator_code:org_t)
- 2018-11-12
- 2019
- Engelska.
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Ingår i: Scandinavian Journal of Medicine and Science in Sports. - : Wiley. - 0905-7188 .- 1600-0838. ; 29:2, s. 213-222
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Idrottsvetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Sport and Fitness Sciences (hsv//eng)
Nyckelord
- breath-by-breath
- exercise testing
- gas exchange
- intra-individual variability
- validation
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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