Commentary
Misconceptions about Aerobic and Anaerobic Energy Expenditure
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Correspondence: Christopher Scott cscott@usm.maine.edu
Sports Medicine Department, University of Southern Maine, Gorham, ME
Journal of the International Society of Sports Nutrition 2005, 2:32-37 doi:10.1186/1550-2783-2-2-32
Published: 9 December 2005Abstract
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.