Body mass index (BMI) is a commonly used international standard to measure obesity and health status. Its calculation formula is the square of weight (kg)/ height (m). Generally speaking, the body mass index of normal adults is between 18.5 and 23.9. For girls, if the body mass index is lower than 18.5, it may belong to the category of thinness.
Body fat rate is an important index to measure body fat content, especially for girls' slimming goals. Generally speaking, the ideal body fat rate for women is around 20-25%. If the body fat rate is too low, it will affect women's physiological functions such as menstrual cycle, which is not conducive to health. Therefore, while pursuing thinness, we should also pay attention to maintaining a healthy body fat rate.
Body circumference is also a key indicator to judge whether girls are thin. When measuring body circumference, it is generally measured in centimeters. Common measurement parts are waist circumference, hip circumference, thigh circumference and calf circumference.
For girls, the ideal girth of each part will be different due to individual differences, but generally speaking, waist-hip ratio (WHR) and thigh girth-height ratio (AT) are the key indicators to measure the symmetry of girls.
computing formula
The formula for calculating the standard weight of women is: standard weight = (cm-70 of height) × 60%.
For example, for a girl with a height of 160cm, the standard weight is (160-70)×60%=54kg. Normal weight is within plus or minus 10%, obesity is above 10%, emaciation is below 10%, and emaciation is above 20%.
There is also a simple formula to calculate the standard weight of adults. The calculation method is that the kilograms of standard weight = centimeters of height-105, for example, the height is 160cm, and its standard weight is 160- 105=55kg.