What is the basal metabolic rate (BMR)?

The basal metabolic rate (BMR) refers to the rate at which energy is expended by the body at rest, in a fasting state, while performing basic physiological functions such as breathing, circulation, and cell production. This measurement is crucial because it represents the minimum amount of energy required to sustain vital bodily functions when an individual is not engaging in any physical activities. It is typically expressed in calories and serves as a baseline to assess an individual's total daily energy expenditure.

Understanding BMR is essential for various applications, including weight management and nutrition planning, as it helps determine caloric needs based on an individual’s lifestyle, level of physical activity, and metabolism. An increase or decrease in BMR can indicate changes in muscle mass, thyroid function, and overall energy levels.