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BMI is an index used in calculating a person’s obesity level. Thanks to that, you can consult your doctor and change your diet accordingly. Let’s find out details about BMI with Tnhelearning.edu.vn.
What is BMI?
What is BMI?
BMI is also known as body mass index, it is a type of human body weight in kilograms divided by the square of height in meters. BMI method is easy to implement, inexpensive and has the ability to screen the body’s weight status and detect obesity early.
Meaning of BMI
BMI has the effect of early warning of obesity and the risks brought by obesity . This is an effective screening method for early detection of this disease. If you are concerned that your BMI is not normal, you can consult your doctor to find the right advice.
Meaning of BMI
High or low BMI can accurately reflect health problems, especially related to weight. A BMI below 18 indicates that you are having an unhealthy diet. Meanwhile, the group of people with a BMI above 25 is thought to have a higher risk of heart disease, diabetes and blood pressure.
In addition, several studies have demonstrated a link between elevated BMI and chronic health conditions. Specifically, middle-aged women and men with excessively high BMI were three times more likely to develop heart disease, blood pressure, type 2 diabetes, and gallstones.
Formula to calculate obesity through BMI
Formula to calculate obesity through BMI
The formula for calculating obesity through specific BMI is as follows:
- Standard Formula: Weight (kg)/ [height (m)] ^ 2
(Take kilograms divided by height in meters squared)
Example: Weight = 52 kg, Height = 160 cm (1.60 m
Calculate: 52 ÷ (1.60)^2 = 20.31
- Formula in pounds and inches: Weight (lb) / [height (in)]^2 x 703
(Divide weight in pounds (lbs) by height in inches (in) squared and multiply by a conversion factor of 703.
Example: Weight = 114 lbs, Height = 63 in
Calculate: [114 ÷ (63)^2 ] x 703 = 20.19
Identify obesity index based on BMI
Identify obesity index based on BMI
Below is a scale to assess overweight and obesity based on BMI for Asians published by WHO:
For people 18 years of age and older:
| Type | TypeBMI – kg/m^2 |
|---|---|
| Underweight | <16 |
| Moderately underweight | 16 – 17 |
| Mild underweight | 17 – 18.5 |
| Normal | 18.5 – 25 |
| Overweight | 25 – 30 |
| Type I obesity | 30 – 35 |
| Type II obesity | 35 – 40 |
| Type III obesity | > 40 |
For children and adolescents aged 2-20 years:
| Type | Limit |
|---|---|
| Underweight | <5% |
| Moderate weight | 5% – 85% |
| Risk of being overweight | 85% – 95% |
| Overweight | > 95% |
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