Body mass index (BMI), referred to as body mass index, is a commonly used international standard to measure obesity and health. The formula is: body mass index = weight ÷ height 2. (Weight unit: kg; Height unit: meter. )

Body mass index was first put forward by Belgian generalist kettler in the middle of19th century. Body mass index (BMI) is a commonly used international index to measure obesity and health. The normal body mass index is between 20 and 25. If it exceeds 25, it means overweight, and if it exceeds 30, it means obesity.

Clinical significance: Abnormal results: body shape is too thin and body shape is too fat. People who need to be examined: people who are too thin and too fat. People who are not properly guarded: none; Taboos before examination: poor rest and improper diet; Requirements during examination: actively cooperate with doctors.

In September, 20021,in a paper published in PLoS Genetics, researchers analyzed how genes and smoking affect individual body mass index based on the genome sequence numbers of 390,000 Britons. They found that genes can explain 50% difference in body mass index between individuals, and self-reported smoking can explain 2% difference in body mass index.

Normal range of body mass index:

Body mass index is body mass index and body fat index, and the normal range is generally set at 18-24, preferably at 20-24. If it is lower than 18, people will lose weight. Body mass index (BMI) is generally calculated by dividing weight by the square of height and meters, and now it is mainly used to judge normal people, overweight and obesity. According to national standards, the body mass index should be overweight at 18-24 and 24-28. If you are over or only 28 years old, you are considered obese.

If it belongs to abdominal obesity, it has a great influence on subsequent organs. Now, in addition to body mass index, waist circumference and waist-hip ratio are also used to judge obesity. Waist circumference mainly reflects abdominal obesity. When there is no better way, the body mass index can roughly measure whether you are overweight or obese, and it is widely used now.