Body mass index (BMI) is an important international standard to measure the degree of obesity and health status, which is mainly used for statistical analysis. The absolute value of weight can't be used to judge the degree of obesity, and the degree of obesity is naturally related to height. Therefore, the body mass index (BMI) obtains a relatively objective parameter through the two values of human body weight and height, and measures the physical quality by the range of this parameter.

Body mass index (BMI) ranges from 18.5 to 24.9, with BMI greater than 25 being overweight and BMI greater than 30 being obese. Asian obesity standard: Asians are too young to be measured by the world obesity standard. For example, when the Japanese body mass index is 24.9, the risk of hypertension will increase by three times; In China, the mortality rate of body mass index is the lowest, which is 23.7. The higher the mortality rate, the greater the initial increase.

Experts believe that the obesity standard of Asians should be that the body mass index is normal at 18.5-22.9, that the body mass index is greater than 23 for overweight, and that the body mass index is greater than 30 for obesity. China obesity standard: China experts believe that although China people belong to Asian race, the upper limit of the normal range of body mass index should be lower than the Asian standard. Some experts suggest that the best value of China people's body mass index should be 20-22, with a body mass index greater than 22.6 as overweight and a body mass index greater than 30 as obesity.

Body mass index is very important for dieters to judge their health. It is a neutral data, which can well judge whether a person is in a healthy state. Body mass index (BMI) must be kept within the normal range. Too high or too low will have a great impact on the body. Therefore, for dieters, it is necessary to measure their weight loss according to the body mass index, which is particularly important in this case.