What is the basal metabolic rate (BMR)?

The basal metabolic rate (BMR) refers to the rate at which the body burns energy while at rest in order to maintain essential physiological functions. This includes processes such as breathing, circulation, cell production, nutrient processing, and temperature regulation. Essentially, BMR represents the minimum amount of energy required to keep the body functioning when it is not active.

Understanding BMR is crucial because it helps gauge one's overall energy needs. It reflects how efficiently the body uses energy and can inform dietary and exercise choices. The other choices refer to different aspects of metabolism or bodily functions: energy storage, physical activity expenditure, and digestion, which, while related to overall metabolism, do not define BMR accurately.