Key result
The submaximal differential model predicted maximal oxygen uptake with a mean relative error of 5.56% compared to maximal exercise testing, offering an accurate alternative without requiring physical exhaustion.
Why the study?
Incremental tests to exhaustion are the gold standard to assess VO2 max, but precise determination based on submaximal tests is attractive for clinical and athletic populations.
Does a differential model based on submaximal bicycle ergometry accurately predict VO2max compared to maximal exercise testing in healthy young adults?
Observational (n=26)
Randomized order for test sequence
No
Does a differential model based on submaximal bicycle ergometry accurately predict VO2max compared to maximal exercise testing in healthy young adults?
A differential model using submaximal cycle ergometry terminated at 80% of estimated maximal heart rate provides an acceptable prediction of VO2max with a mean relative error of 5.56% in healthy young adults, offering a potential alternative to exhaustive testing.
Answers are grounded in this paper and cite their sources.
Submaximal VO2max prediction yields ~6% mean error in healthy adults; leaves open validation in clinical or older populations before adoption.
The maximal oxygen uptake (VO 2 max) estimation has been a subject of research for many years. Cardiorespiratory measurements during incremental tests until exhaustion are considered the golden yard stick to assess VO 2 max. However, precise VO 2 max determination based on submaximal tests is attractive for athlete as well for clinical populations. Here, we propose and verify such a method based on experimental data. Using a recently developed model of heart rate (HR) and VO 2 kinetics in graded exercise tests, we applied a protocol, which is terminated at 80% of the estimated maximal HR during ergometer cycling. In our approach, initially, formula for maximal HR is selected by retrospective study of a reference population (17 males, 23.5 ± 2.0 years, BMI: 23.9 ± 3.2 kg/m 2 ). Next, the subjects for experimental group were invited (nine subjects of both sexes: 25.1 ± 2.1 years, BMI 23.2 ± 2.2 kg/m 2 ). After calculation of maximal HR using cardiorespiratory recordings from the submaximal test, VO 2 max is predicted. Finally, we compared the prediction with the values from the maximal exercise test. The differences were quantified by relative errors, which vary from 1.2% up to 13.4%. Some future improvements for the procedure of VO 2 max prediction are discussed. The experimental protocol may be useful for application in rehabilitation assessment and in certain training monitoring settings, since physical exertion is not a prerequisite and the approach provides an acceptable VO 2 max estimation accuracy.
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Petelczyc et al. (2023) conducted an observational in Healthy, physically active individuals (n=26). Submaximal bicycle ergometry using a differential model (SMO) vs. Maximal exercise test until exhaustion was evaluated on Mean relative error of VO2max prediction compared to experimental VO2max. The submaximal differential model predicted maximal oxygen uptake with a mean relative error of 5.56% compared to maximal exercise testing, offering an accurate alternative without requiring physical exhaustion.
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