Journal of the International Society of Sports Nutrition (Dec 2005)

Misconceptions about Aerobic and Anaerobic Energy Expenditure

  • Scott Christopher

DOI
https://doi.org/10.1186/1550-2783-2-2-32
Journal volume & issue
Vol. 2, no. 2
pp. 32 – 37

Abstract

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Abstract The measurement of gas exchange has played an invaluable role in metabolic interpretation. The uptake of 1 liter of oxygen is often converted into an energy expenditure estimate of 21.1 kilojoules (e.g., 1 L O2 = 21.1 kJ or ~5 kcal). This article demonstrates both the importance of such a conversion and the potential for misinterpretation. Oxygen uptake during heavy and severe exercise will also be discussed.