Basal Metabolic Rate (BMR) Basal metabolic rate (BMR) is the
average daily amount of energy (calories) that is used by a body
when it is at rest. Heredity, height, body composition, and age
determine a person's basal metabolic rate. It is also known as
basal energy expenditure (BEE). The energy in a person's BMR is
used to keep body temperature normal and to power the heartbeat,
breathing, and other organ functions. Your BMR uses up about
two-thirds of your daily calories. The best measure of BMR is
taken when you are not digesting any food or doing any activity,
usually right after waking up for the day. Another option is to
measure resting metabolic rate (RMR), also known as resting
energy expenditure (REE). This is very similar to BMR, but the
test can be done with fewer restrictions. eMedicineHealth
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