The concept of height and body mass index was first put forward by Belgian generalist kettler in the middle of19th century. It is defined as follows:
Body mass index (BMI) = weight (kg) ÷ height 2 (m).
"Guidelines for the Prevention and Treatment of Overweight and Obesity for Adults in China" defines China adults with a body mass index ≥24 as overweight and a body mass index ≥28 as obesity.
1, the body mass index can't really reflect the actual amount of fat, nor can it explain the position of fat in the body.
Many analytical studies show that only abdominal obesity, not systemic obesity, can really use the body mass index to predict whether a person will suffer from cardiovascular disease or cancer.
2. The body mass index can't distinguish between fat and muscle. In many cases, a person who is classified as overweight or 1 obese by the body mass index (close to the overweight range) may have a healthier metabolism than a person with normal weight as long as he takes proper fitness exercise. However, according to the standard classification of body mass index, this person is no different from people with poor physique and severe obesity.
Extended data:
According to the summary analysis report of China population data in 1990s, the China Obesity Working Group put forward the obesity standard suitable for adults in China for the first time:
Body mass index greater than or equal to 24 is overweight, and greater than or equal to 28 is obese; Male waist circumference is greater than or equal to 85 cm, and female waist circumference is greater than or equal to 80 cm.
Body mass index (BMI) is widely used to measure the degree of obesity in the world. Body mass index is equal to weight (kg) divided by the square of height (m). Waist circumference is an important index to measure abdominal obesity, which reflects the degree of abdominal fat accumulation and is related to a series of metabolic abnormalities.
References:
Baidu Encyclopedia-Body Mass Index Index