Knowra Basal metabolic rate Basal metabolic rate Basal metabolic rate is the energy the body uses per unit time to sustain essential functions under strict resting, fasting, and thermoneutral conditions.
Resting energy expenditure : The energy the body expends at rest under less restrictive conditions than basal measurement. It is often used interchangeably with basal metabolic rate, but its measurement conditions are broader.
Total daily energy expenditure : The total energy an organism expends over a day, including resting metabolism, activity, and food processing. BMR is only one component of this broader daily energy budget.
Energy balance : The relationship between energy intake and energy expenditure over time. BMR contributes to expenditure, while intake and other energy costs determine the balance.
Basal metabolic rate prediction equations : Formulas that estimate basal or resting energy expenditure from characteristics such as age, sex, height, and weight. Their accuracy varies across populations and individuals, motivating comparison with direct measurement.
Indirect calorimetry : A method for estimating energy expenditure from oxygen consumption and carbon dioxide production. It measures the gas exchange used to calculate basal metabolic rate.
Resting metabolic rate : Energy expenditure measured at rest without all the strict conditions required for basal metabolic rate. Its looser protocol makes it more practical but not identical to BMR.
Indirect calorimetry in clinical nutrition : The clinical use of gas-exchange measurements to estimate a patient's energy requirements. Measured resting expenditure can guide nutrition support when prediction equations are unreliable.
Metabolic adaptation to weight loss : A reduction in energy expenditure during weight loss that exceeds the change expected from lost body mass. It raises questions about how long-term weight change alters resting energy needs.
Mifflin–St Jeor equation : An equation that estimates resting energy expenditure from age, sex, height, and weight. It offers a widely used prediction when direct measurement is unavailable.
Thermic effect of food : The increase in energy expenditure caused by digesting, absorbing, and processing food. Fasting excludes this post-meal energy cost from basal measurements.
Show all 21