ArticleFrontiers in physiology2015
Gas analyzer's drift leads to systematic error in maximal oxygen uptake and maximal respiratory exchange ratio determination.
Article in Frontiers in physiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed.
- In-Field Validity and Inter-Unit Variability of Metabolic Carts During Simulated Exercise.Scandinavian journal of medicine & science in sports · 2026Article
- Technological and Biological Reliability, and Validity of Five Different CPET Systems During Simulated and Human Exercise.Scandinavian journal of medicine & science in sports · 2026Article
- A new objective method for determining exercise gas exchange thresholds by respiratory frequency in middle-aged men.European journal of applied physiology · 2024Article
- Validity and reliability of a new whole room indirect calorimeter to assess metabolic response to small calorie loads.PloS one · 2024Article
- Heat stress increases carbohydrate oxidation rates and oxygen uptake during prolonged load carriage exercise.Temperature (Austin, Tex.) · 2024Article
- Current definitions of the breathing cycle in alveolar breath-by-breath gas exchange analysis.American journal of physiology. Regulatory, integrative and comparative physiology · 2023Review
- Estimation of maximal oxygen uptake using the heart rate ratio method in male recreational football players.European journal of applied physiology · 2022Article
- Disadvantages of Automated Respiratory Gas Exchange Analyzers.Frontiers in physiology · 2020Article
- A Randomized Controlled Trial Investigating the Effects of Undulatory, Staggered, and Linear Load Manipulations in Aerobic Training on Oxygen Supply, Muscle Injury, and Metabolism in Male Recreational Runners.Sports medicine - open · 2019Article
- Quality control of open-circuit respirometry: real-time, laboratory-based systems. Let's spread "good practice".European journal of applied physiology · 2018Article
- A "Frontiers in physiology · 2018Article
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4 authors.
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Abstract
The aim was to examine the drift in the measurements of fractional concentration of oxygen (FO2) and carbon dioxide (FCO2) of a Nafion-using metabolic cart during incremental maximal exercise in 18 young and 12 elderly males, and to propose a way in which the drift can be corrected. The drift was verified by comparing the pre-test calibration values with the immediate post-test verification values of the calibration gases. The system demonstrated an average downscale drift (P < 0.001) in FO2 and FCO2 of -0.18% and -0.05%, respectively. Compared with measured values, corrected average maximal oxygen uptakevalues were 5-6% lower (P < 0.001) whereas corrected maximal respiratory exchange ratio values were 8-9% higher (P < 0.001). The drift was not due to an electronic instability in the analyzers because it was reverted after 20 min of recovery from the end of the exercise. The drift may be related to an incomplete removal of water vapor from the expired gas during transit through the Nafion conducting tube. These data demonstrate the importance of checking FO2 and FCO2 values by regular pre-test calibrations and post-test verifications, and also the importance of correcting a possible shift immediately after exercise.
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