What is BMI? How to calculate BMI?

What is body mass index?

Body mass index is the body mass index, which is called Body Mass Index in English, or BMI for short. It is a number obtained by dividing the number of kilograms of weight by the square of height and meters. It is currently a commonly used internationally to measure the degree of fat and thinness and whether the human body is healthy. standard. Mainly used for statistical purposes, BMI is a neutral and reliable indicator when we need to compare and analyze the health impact of a person's weight on people of different heights.

BMI values were originally designed to be a statistical tool used in public health research. When we need to know whether obesity is the cause of a disease, we can convert the patient's height and weight into a BMI value, and then find out whether there is a linear correlation between the value and the incidence rate. However, with the advancement of technology, the current BMI value is only a reference value. To truly measure whether a patient is obese, it is also necessary to use microelectricity to measure the patient's impedance to infer the patient's fat thickness. As a result, the role of BMI has slowly changed, from a medical use to a slimming indicator for the general public.

Calculation formula:

Body mass index (BMI)= weight (kg) ÷ height (m)^2

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BMI index value:

Due to errors, BMI can only be used as one of many criteria for assessing an individual's weight and health status. The National Institutes of Health (NIH) recommends assessing whether a patient is overweight based on the following factors.

BMI waist circumference-measures abdominal fat and risk factors for obesity-related diseases such as hypertension, high LDL ("malignant") cholesterol, low HDL ("benign") cholesterol, high blood sugar and smoking.

Since BMI does not take into account a person's fat ratio, a person with an overweight BMI may not actually be obese. For example, a person who exercises fitness will have a large proportion of muscles in his weight and his BMI will exceed 30. If their body fat ratio is low, there is no need to lose weight.

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(Editor in charge: He Zhiyan)

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