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. Its definition is as follows: body mass index (BMI) = weight (kg)/ height (m) 2 For example: 75/( 1.8 2) = 23. 15.
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Body mass index (BMI) = weight (kg)/height (m)? For example, a person's height is 1.75m, his weight is 68kg, and his body mass index =68/( 1.75)? =22.2 (kg/m？ This index is normal when 18.5~24.9. Pay special attention to the fact that the body mass index is not suitable for everyone, if it is the following: 18 years old; Is an athlete; Do weight training; Pregnancy or breastfeeding; The body mass index is not applicable to the elderly who are weak or sedentary.
When the body mass index is 25kG/M2 (in the United States, it is 27 kg/m2 for men and 25 kg/m2 for women), it is obesity. The international standards for measuring overweight and obesity adopted at the expert meeting of the World Health Organization held in Geneva from 65438 to 0997 are: the body mass index of 25 kg/m2 is overweight; The body mass index between 25 and 29.9 kg/m2 is pre-obesity (borderline obesity); The body mass index (BMI) of 30kg/m2 belongs to obesity.
Obesity can be divided into three levels: the body mass index of 30-34.9 kg/m2 is called Class I obesity; The body mass index is 35 blades. 9kg/m2: it is called Grade II obesity; Body mass index-GT0 ~ 40kg/m2 is grade III obesity.