Body mass index (BMI), also known as BMI, is an index calculated according to height and weight. It is a number obtained by dividing weight (in kilograms) by the square of height (in meters), that is, body mass index = weight/height/height (kg /m2). For example, height 1.75m and weight 70.
For the male with 1 kg, his body mass index =70/ 1.752=22.9.
Body mass index (BMI) is a widely used international standard to measure obesity and health status. Research shows that the body mass index of most individuals has obvious correlation with the percentage of body fat, which can better reflect the degree of obesity. At the same time, the calculation method of body mass index is simple, which can eliminate the influence of different heights on weight and facilitate the comparison between people or individuals. At present, the World Health Organization also uses the body mass index to judge whether you are obese or overweight.
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Significance of body mass index to health management
1, the change trend of body mass index is stable at the same age, which is convenient for setting the same threshold point.
2. The performance of body mass index in different countries and groups is roughly the same, which is suitable for cross-national comparison.
3. The body mass index method is simple and can be used for epidemiological investigation and research of obesity.
4. Body mass index is not only an operable index to evaluate obesity, but also an important index for the transition between health and disease. Easy to master, conducive to management, more suitable for individuals to monitor their own health.
5. Body mass index can only reflect the nutritional status of the whole body, but not the local body shape characteristics of the human body. It is necessary to combine waist circumference, hip circumference and waist-hip ratio for comprehensive judgment.
6. When evaluating the effect of obesity intervention treatment with body mass index, the change is not obvious, and it is more convenient and practical to monitor the change directly with body mass index.
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