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Resting Energy Expenditure

Basal metabolic rate, or BMR, is a term that expresses the amount of energy used in the resting state. Other terms for BMR include resting metabolic rate or resting energy expenditure, since it is often hard to determine that a person is in the “basal” state. Because it reflects more current usage, this entry uses resting energy expenditure, or REE, in place of BMR. In normal individuals, this represents about 60% to 75% of the total daily energy expenditure.

Measurement of Metabolic Rate

REE has been measured for more than a century and was initially recorded by collecting the expired air in a bag and then determining the amount of oxygen used and carbon dioxide produced. Alternatively, the carbon dioxide can be absorbed from the expired air ...

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