What is the term for the rate at which the body uses energy during rest?

The term that specifically refers to the rate at which the body uses energy during rest is known as the Basal Metabolic Rate (BMR). BMR represents the energy expenditure of the body at rest and is crucial because it accounts for the calories burned to maintain essential physiological functions, such as breathing, circulation, and cell production, while at rest.

BMR is typically measured under specific conditions: the individual should be in a fasted state, comfortable temperature, and at rest. This distinction is vital, as BMR provides a baseline measurement of energy requirements, helping in understanding overall metabolism and informing dietary and exercise plans for weight management or muscle gain.

While the term metabolic rate is related, it encompasses more than just the resting state, including additional energy expenditures associated with physical activity and digestion. Caloric expenditure rate and resting energy rate can also refer to the energy the body uses but are not as precise as BMR in describing the resting metabolic state under standardized conditions.