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Understanding BMI
Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight and obesity in adults.
It is defined as a person's weight in kilograms divided by the square of their height in meters (kg/m²).
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Why BMI Matters
BMI provides a reliable indicator of body fatness for most people and is used to screen for weight categories that may lead to health problems.
Maintaining a healthy BMI can help prevent conditions such as heart disease, diabetes, and certain cancers.
BMI Categories
- Underweight: BMI less than 18.5
- Normal weight: BMI 18.5 - 24.9
- Overweight: BMI 25 - 29.9
- Obesity: BMI 30 or greater
Limitations of BMI
While BMI is a useful screening tool, it does have limitations:
- May overestimate body fat in athletes
- May underestimate body fat in older persons
- Does not directly measure body fat
- Does not account for muscle mass