Basal metabolism can be expressed as basal metabolic rate (BMR), BMR = (pulse rate + pulse pressure) – 111.Determination of basal metabolic rate is performed in a quiet, resting state. The basal metabolic rate assesses a person’s basal metabolism and needs to be performed in a quiet, resting state, i.e., the rate of energy metabolism when the whole body is in a state of muscle relaxation without any exercise. The estimated basal metabolic rate can be calculated using the formula, basal metabolic rate = (pulse rate + pulse pressure) – 111. The normal value of basal metabolic rate is ±10%. There are more influencing factors, such as age, gender, ambient temperature, climate, body surface area, and endocrine environment, etc. It is higher in males than in females, higher in infants, children and adolescents than in adults, and pathological conditions, and the basal metabolic rate is markedly elevated in patients with hyperthyroidism. Abnormal basal metabolic rate should be examined and treated under the supervision of a doctor.