There are two ways to test the basal metabolism, the first one is obtained by formula, you only need to bring the height (cm), weight (kg), gender and age into the formula to calculate the basal metabolism. Male: 66 + (13.7*weight) + (5*height) – (6.8*age). Female: 655 + (9.6*weight) + (1.85*height) – (4.7*age). The second method is the indirect calorie counting method, which is determined by measuring the oxygen consumed and carbon dioxide exhaled by the body per unit of time, using special conversions. Basal metabolism refers to the energy requirements of the body in a fasting, awake and quiet state with an ambient temperature of 18~25°C, and is used to maintain normal physiological functions of the body. Examination of basal metabolism is an effective method of diagnosing thyroid disorders in clinical practice. When patients have abnormal basal metabolism, it is recommended that they seek timely medical treatment under the guidance of a doctor.