Body Mass Index (BMI), that is, body mass index, is an index closely related to total body fat, which mainly reflects overweight and obesity. Because the body mass index calculates the proportion of body fat, it is more accurate to measure the risk of heart disease, hypertension and other diseases because of overweight than to identify them simply by weight.
Body mass index
Body mass index was originally designed as a statistical tool for public health research. When we need to know whether obesity is the cause of the disease, we can convert the patient's height and weight into body mass index, and then find out whether there is a linear correlation between this value and the incidence.
However, with the development of science and technology, the current body mass index value is only a reference value. In order to truly measure whether a patient is obese, it is necessary to measure the patient's impedance by micro-electricity, so as to infer the patient's fat thickness. Therefore, the role of body mass index has gradually changed, from medical use to mass weight loss index.
Adult body mass index numerical body mass index, both men and women are light, below 20, 19, medium, 20-25, 19-24 overweight, 25-30, 24-29 obese, 30-35, 29-34 very obese, over 35, 34.
The National Institutes of Health (NIH) advises doctors to refer to the following three factors to assess whether a patient is overweight. Body mass index waist circumference-measures the risk factors of abdominal fat and obesity-related diseases, such as hypertension, high LDL ("malignant") cholesterol, low HDL ("benign") cholesterol, hyperglycemia and smoking.
Because the body mass index does not take into account a person's fat ratio, a person with an overweight body mass index may not actually be obese. For example, a person who practices fitness will have a body mass index of more than 30 because of his heavy muscle weight. If their body fat rate is low, they don't need to lose weight.
Refer to the above? Baidu Encyclopedia-Weight and Height Index