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Body Mass Index

Body Mass Index (BMI) is a measurement for determining the body fat of an individual, if the person has a healthy weight or not. It is expressed in kg/m².

Other methods to measure body fatness include; skinfold thickness measurements (with calipers), underwater weighing, bioelectrical impedance, dual-energy x-ray absorptiometry (DXA), and isotope dilution.

Body Mass Index (BMI) = Weight / (Height)²

Body Mass Index calculator

BMI values for corresponding weights

Below 18.5 – Underweight
18.5 – 24.9          – Healthy weight
25.0 – 29.9           – Overweight
30.0 plus         – Obese

Body Mass Index Limitation

• It does not consider body composition ( fat mass or high muscle mass)- Overweight is not necessarily overfat
• It is not applicable to very short or tall persons
• Does not consider what percentage is subcutaneous or abdominal fat

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