Basal metabolism refers to the energy metabolism that is most basic to sustain the body’s life activities and is mainly influenced by gender, age, height, weight and health status. Common methods of measuring basal metabolism include Gale’s method, Reed’s method, Kosa’s method, etc. Measurement needs to be done in a conscious and quiet state. 1. Gale method, basal metabolic rate % = (pulse rate + pulse pressure difference) – 111. 2. Reed’s method, % basal metabolic rate = 0.75 x (pulse rate + pulse pressure difference x 0.74) – 72. 3. Kosa method, % basal metabolic rate = 1.28 x (pulse rate + pulse pressure difference) – 116. A normal basal metabolic rate is usually not more than 15% of the average value. The opposite indicates that the patient’s metabolism may be abnormal, which may be caused by diseases such as hyperthyroidism or hypothyroidism. Patients with abnormal basal metabolic levels are advised to consult a medical professional for diagnosis and treatment.