ArticleEuropean journal of applied physiology2013
Inter-unit variability in two ParvoMedics TrueOne 2400 automated metabolic gas analysis systems.
Article in European journal of applied physiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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Who cites it
20 citing papers in PubMed.
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- Validity and reliability of the K5 wearable metabolic system during high-intensity treadmill testing in healthy, young adults.Proceedings (Baylor University. Medical Center) · 2026Article
- 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
- Does digital device software lead to exclusion? Investigating a portable metabolic analysis system and the input of sex data on physiological parameters.Frontiers in digital health · 2025Article
- Using a Contemporary Portable Metabolic Gas Exchange System for Assessing Energy Expenditure: A Validity and Reliability Study.Sensors (Basel, Switzerland) · 2023Article
- Validity and reproducibility of VOScandinavian journal of medicine & science in sports · 2021Article
- Reliability and validity of the COSMED K5 portable metabolic system during walking.European journal of applied physiology · 2021Article
- Predicting Maximal Oxygen Uptake Using the 3-Minute All-Out Test in High-Intensity Functional Training Athletes.Sports (Basel, Switzerland) · 2020Article
- Inter- and intra-unit reliability of the COSMED K5: Implications for multicentric and longitudinal testing.PloS one · 2020Observational
- Physiological Performance Measures as Indicators of CrossFitSports (Basel, Switzerland) · 2019Article
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- Determining the Accuracy and Reliability of Indirect Calorimeters Utilizing the Methanol Combustion Technique.Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition · 2018Article
- Cycling Efficiency During Incremental Cycle Ergometry After 24 Hours of Overfeeding or Fasting.Obesity (Silver Spring, Md.) · 2018Article
- Validity, reliability and minimum detectable change of COSMED K5 portable gas exchange system in breath-by-breath mode.PloS one · 2018Article
- Article
- DIETFITS study (diet intervention examining the factors interacting with treatment success) - Study design and methods.Contemporary clinical trials · 2017Article
- A Statistical Method and Tool to Account for Indirect Calorimetry Differential Measurement Error in a Single-Subject Analysis.Frontiers in physiology · 2016Article
- The validity of the Moxus Modular metabolic system during incremental exercise tests: impacts on detection of small changes in oxygen consumption.European journal of applied physiology · 2014Article
- Article
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2 authors.
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Abstract
Knowing the inter-unit variability, especially the technological error, is important when using many physiological measurement systems, yet no such inter-unit analysis has been undertaken on duplicate automated gas analysis systems. This study investigated the inter-unit performance of two identical ParvoMedics TrueOne 2400 automated gas analysis systems during a range of submaximal steady-state exercises performed on an electromagnetic cycle ergometer. Fifteen adult males were tested on two separate days a rest, 30, 60, 90, and 120 Watts with the duplicate gas analysis units arranged (1) collaterally (2 min of steady-state expired gas was alternately passed through each system), and (2) simultaneously (identical steady-state expired gas was passed simultaneously through both systems). Total within-subject variation (biological + technological) was determined from the collateral tests, but the unique inter-unit variability (technological error between identical systems) was shown by the simultaneous tests. Absolute percentage errors (APE), coefficient of variations (CV), effect sizes and Bland-Altman analyses were undertaken on the metabolic data, including expired ventilation (V (E)), oxygen consumption (VO(2)) and carbon dioxide production (VCO(2)). The few statistically significant differences detected between the two duplicate systems were determined to have small or trivial effect sizes, and their magnitudes to be of little physiological importance. The total within-subject variations for VO(2), VCO(2) and V (E) each equated to a mean CV and mean APE value of ~4 and ~6 %, whilst the respective inter-unit technological errors equated to ~1.5 and ~2.1 %. The two ParvoMedics TrueOne 2400 systems demonstrated excellent inter-unit agreement.
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