Basal metabolism refers to the energy requirements of the human body in a fasting, awake and quiet state with an ambient temperature of 18-25°C to maintain basic physiological activities of the body. The amount of basal metabolic energy required per square meter of body surface area per unit of time is called the basal metabolic rate. Basal metabolism is affected by many factors, such as height, age, etc., so the specific metabolic profile varies from person to person. Clinically, basal metabolic rate can also be estimated by the following method: fasting for 12 hours, lying on an empty stomach early in the morning after 8 hours of sleep, basal metabolic rate (%) = (pulse rate + pulse pressure) – 111 (pulse pressure is calculated in mmHg). The normal range is -10% to +10% (or +15%). If the basal metabolic rate is low, it is necessary to strengthen the daily care, timely correction of poor living and eating habits, eat more light, easy to digest food, such as green leafy vegetables, and appropriate outdoor exercise. If necessary, consult a doctor.