The oxygen uptake efficiency slope does not accurately predict V˙O2peak of children – the Arkansas Active Kids study
Cardiorespiratory fitness (CRF) is a vital indicator of health. However, accurately measuring peak oxygen consumption ( V ˙ O2peak) to determine CRF in children can be challenging. The oxygen uptake efficiency slope (OUES) has been proposed as an alternative metric for predicting V ˙ O2peak in child...
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| Vydáno v: | Frontiers in physiology Ročník 15; s. 1358942 |
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| Hlavní autoři: | , , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
| Vydáno: |
Frontiers Media S.A
26.09.2024
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| Témata: | |
| ISSN: | 1664-042X, 1664-042X |
| On-line přístup: | Získat plný text |
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| Shrnutí: | Cardiorespiratory fitness (CRF) is a vital indicator of health. However, accurately measuring peak oxygen consumption ( V ˙ O2peak) to determine CRF in children can be challenging. The oxygen uptake efficiency slope (OUES) has been proposed as an alternative metric for predicting V ˙ O2peak in children, but its accuracy and agreement with measured V ˙ O2peak remain unclear.BackgroundCardiorespiratory fitness (CRF) is a vital indicator of health. However, accurately measuring peak oxygen consumption ( V ˙ O2peak) to determine CRF in children can be challenging. The oxygen uptake efficiency slope (OUES) has been proposed as an alternative metric for predicting V ˙ O2peak in children, but its accuracy and agreement with measured V ˙ O2peak remain unclear.A post hoc analysis was conducted in 94 children (ages 7-10 years) who completed an incremental cycle ergometer test to measure V ˙ O2peak. Body composition (Dual-energy X-ray absorptiometry) was measured, and fat mass index (FMI, kg/m2) and fat-free mass index (FFMI, kg/m2) were calculated. OUES was determined using all respiratory data (OUES100%) collected during the cycle ergometer test and using data only up to 60% of heart rate reserve (OUES60%HRR). Regression equations to predict V ˙ O2peak (Pred- V ˙ O2peak) were derived from simple and multiple linear regression analysis. Bland-Altman analysis assessed the level of agreement between Pred- V ˙ O2peak and measured V ˙ O2peak.MethodsA post hoc analysis was conducted in 94 children (ages 7-10 years) who completed an incremental cycle ergometer test to measure V ˙ O2peak. Body composition (Dual-energy X-ray absorptiometry) was measured, and fat mass index (FMI, kg/m2) and fat-free mass index (FFMI, kg/m2) were calculated. OUES was determined using all respiratory data (OUES100%) collected during the cycle ergometer test and using data only up to 60% of heart rate reserve (OUES60%HRR). Regression equations to predict V ˙ O2peak (Pred- V ˙ O2peak) were derived from simple and multiple linear regression analysis. Bland-Altman analysis assessed the level of agreement between Pred- V ˙ O2peak and measured V ˙ O2peak.OUES60%HRR (β = 0.46, p < 0.0001), age (β = 56.0, p = 0.0004), White race (β = 173.3, p < 0.0003), FFMI (β = 0.98.6, p < 0.000), and FMI (β = -0.40.8, p < 0.000) were retained in the final model. The difference between measured V ˙ O2peak and Pred- V ˙ O2peak was not different from zero (p = 0.999). There was a positive association between the difference of measured V ˙ O2peak and Pred- V ˙ O2peak and the average of the two methods (β = 0.79, p = 0.0028).ResultsOUES60%HRR (β = 0.46, p < 0.0001), age (β = 56.0, p = 0.0004), White race (β = 173.3, p < 0.0003), FFMI (β = 0.98.6, p < 0.000), and FMI (β = -0.40.8, p < 0.000) were retained in the final model. The difference between measured V ˙ O2peak and Pred- V ˙ O2peak was not different from zero (p = 0.999). There was a positive association between the difference of measured V ˙ O2peak and Pred- V ˙ O2peak and the average of the two methods (β = 0.79, p = 0.0028).There was no mean bias between measured V ˙ O2peak and Pred- V ˙ O2peak. However, magnitude bias was present even after considering other significant predictors of V ˙ O2peak (FMI, FFMI, race, and age) in the regression equation. Caution is advised when using OUES to predict V ˙ O2peak in children.ConclusionThere was no mean bias between measured V ˙ O2peak and Pred- V ˙ O2peak. However, magnitude bias was present even after considering other significant predictors of V ˙ O2peak (FMI, FFMI, race, and age) in the regression equation. Caution is advised when using OUES to predict V ˙ O2peak in children. |
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| Bibliografie: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Edited by: Mustafa Gul, Atatürk University, Türkiye Marshall Riley, Belfast City Hospital, United Kingdom Reviewed by: Calaine Inglis, University of Calgary, Canada |
| ISSN: | 1664-042X 1664-042X |
| DOI: | 10.3389/fphys.2024.1358942 |