Basal metabolic rate

Basal metabolic rate (BMR) is the amount of energy (measured in calories) your body needs when at rest. Your BMR is like the amount of fuel your body needs to keep all its systems running, including your heart, lungs, brain, and other organs. The number of calories your body needs depends on factors like your age, weight, and height. Eating too little or too much food can affect your BMR, so eating a balanced diet is important to keep your body running smoothly.