Body mass index is calculated by the ratio of weight to height, and the formula is: body mass index = weight (kg)/ (height (m) × height (m)). According to the classification standard of the World Health Organization (WHO), the body mass index can be divided into the following different ranges:
Body mass index < 18.5: too light.
Body mass index 18.5-24.9 normal weight.
Body mass index 25-29.9: overweight
Body mass index ≥ 30: obesity
However, the body mass index has some limitations, such as:
Can't tell the difference between body fat and muscle: The body mass index only considers the proportion of weight and height, and does not consider the proportion of body fat and muscle in the body composition. Therefore, for some athletes, fitness enthusiasts and so on. They may get a higher body mass index because of their higher muscle content, but their actual physical condition may not be obese.
Ignoring individual differences: Different people's body composition and physiological conditions are different, such as age, gender, race and other factors may affect the interpretation and application of body mass index. For example, in the elderly, due to the decline of muscle mass and bone density, the body mass index may be low, but their actual nutritional status may not be ideal.
Can not fully reflect health risks: Body mass index is only a rough indicator of physical condition, and can not fully reflect health-related risk factors, such as cardiovascular disease, diabetes, hypertension and so on. In fact, some people may be in the normal body mass index range, but there are still other health risk factors, while some people may be in the overweight or obese body mass index range, but there are no obvious health problems.
Therefore, it may not be sufficient and accurate to measure whether the material conditions meet the funding conditions only based on the data of body mass index. It may be more reasonable and accurate to make a more comprehensive assessment of the individual's physical condition by comprehensively considering the individual's body composition, physiological condition, health risk factors and other factors. When evaluating an individual's physical condition, it is necessary to combine body mass index and other related indicators, such as body fat rate, waist circumference and lifestyle, so as to evaluate the individual's physical condition more comprehensively.