Misconceptions about Aerobic and Anaerobic Energy Expenditure.
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.
Scott
Christopher
C
Sports Medicine Department, University of Southern Maine, Gorham, ME. cscott@usm.maine.edu.