Mainly used for statistical purposes, when we need to compare and analyze the impact of a person's weight on the health of people of different heights, the body mass index value is a neutral and reliable indicator. It is a test item stipulated in the National Students' Physical Health Standard.
Body mass index (BMI) = weight (kg)/ height m2 (m) ex: 75kg/1.8/1.8 = 23.15.
Extended data:
Body mass index (BMI) of adults, male and female; Too light, less than 20, less than19; Medium, 20-25,19-24; Overweight, 25-30,24-29; Obesity, 30-35,29-34; Very obese, over 35, over 34.
The traditional WHO adult obesity standard is below 30, but the Asian adult index has recently been changed to 27.5. Asian adults with a body mass index of 23 are now considered overweight, and the ideal index is 18.5 to 22.9? .
Children's body mass index values are not only applicable to adults. For growing children, we can also use their body mass index to calculate whether they are overweight. The above formula for calculating body mass index is also applicable to people aged 2-20, but their overweight and body mass index are not determined by a fixed body mass index value. This is because children in different regions grow at different speeds, and it is easy to make wrong judgments if a fixed value is used.
Many countries and regions make statistics on the height and weight of local children every year. These statistics can be converted into body mass index values, and then the distribution of body mass index values of local children can be counted. According to this distribution, the local health government can calculate the overweight and underweight indicators of local children.
Generally speaking, the average body mass index and its standard deviation are used, and then the highest 5% and lowest 5% of its normal distribution are calculated as overweight and underweight indicators. On the other hand, children whose body mass index is within 85%-95% of the normal distribution are at risk of being overweight.
Baidu Encyclopedia-Weight and Height Index