ArticleEuropean journal of applied physiology2019
The "independent breath" algorithm: assessment of oxygen uptake during exercise.
Article in European journal of applied physiology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Breath-by-breath measurement of alveolar gas exchange must preserve mass balance and conform to a physiological definition of a breath.Experimental physiology · 2025Article
- Confidence intervals estimator of the kinetic parameters: do its reliability depend on the assembling method of the oxygen uptakes?European journal of applied physiology · 2025Article
- The algorithm used for the calculation of gas exchange affects the estimation of OExperimental physiology · 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
- Interchangeability between two breath-by-breath OEuropean journal of applied physiology · 2020Article
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2 authors.
Funding
Abstract
purposeReduction of noise of breath-by-breath gas-exchange data is crucial to improve measurements. A recently described algorithm ("independent breath"), that neglects the contiguity in time of breaths, was tested.
methodsOxygen, carbon dioxide fractions, and ventilatory flow were recorded continuously over 26 min in 20 healthy volunteers at rest, during unloaded and moderate intensity cycling and subsequent recovery; oxygen uptake ([Formula: see text]) was calculated with the "independent breath" algorithm (IND) and, for comparison, with three other "classical" algorithms. Average [Formula: see text] and standard deviations were calculated for steady-state conditions; non-linear regression was run throughout the [Formula: see text] data of the transient phases (ON and OFF), using a mono-exponential function.
resultsComparisons of the different algorithms showed that they yielded similar average [Formula: see text] at steady state (p = NS). The standard deviations were significantly lower for IND (post hoc contrasts, p < 0.001), with the slope of the relationship with the corresponding data obtained from "classical" algorithms being < 0.69. For both transients, the overall kinetics (evaluated as time delay + time constant) was significantly faster for IND (post hoc contrasts, p < 0.001). For the ON transient, the asymptotic standard errors of the kinetic parameters were significantly lower for IND, with the slope of the regression line with the corresponding values obtained from the "classical" algorithms being < 0.60.
conclusionThe "independent breath" algorithm provided consistent average O
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