It is time to abandon single-value oxygen uptake energy equivalents.
J Appl Physiol (1985)
; 134(4): 887-890, 2023 04 01.
Article
em En
| MEDLINE
| ID: mdl-36825641
ABSTRACT
Physiologists commonly use single-value energy equivalents (e.g., 20.1 kJ/LO2 and 20.9 kJ/LO2) to convert oxygen uptake (VÌo2) to energy, but doing so ignores how the substrate oxidation ratio (carbohydratefat) changes across aerobic intensities. Using either 20.1 kJ/LO2 or 20.9 kJ/LO2 can incur systematic errors of up to 7%. In most circumstances, the best approach for estimating energy expenditure is to measure both VÌo2 and VÌco2 and use accurate, species-appropriate stoichiometry. However, there are circumstances when VÌco2 measurements may be unreliable. In those circumstances, we recommend that the research report or compare only VÌo2.NEW & NOTEWORTHY We quantify that the common practice of using single-value oxygen uptake energy equivalents for exercising subjects can incur systematic errors of up to 7%. We argue that such errors can be greatly reduced if researchers measure both VÌo2 and VÌco2 and adopt appropriate stoichiometry equations.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Consumo de Oxigênio
/
Dióxido de Carbono
Limite:
Humans
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article