Previously we have discussed the obesity epidemic, the Surgeon General’s warning, associated risks of this condition, the definition of obesity and overweight, as well as some of the excuses and lifestyle factors associated with obesity.

In this issue we will discuss some methods of fat calculation, and cut off levels associated with increased risk.

Methods of Fat Calculation

There are numerous ways in which to calculate the approximate fat content of an individual’s body. Some of the more commonly known methods are: BMI (Body Mass Index), DEXA (dual energy x-ray absorptiometry), bioelectrical impedance analysis, skin caliper pinch tests, and underwater weighing.
The most direct measures of body fat, such as underwater weighing or DEXA scanning, are impractical for use. Indirect estimates of body fat are more practical. (1)

Body Mass Index

One of the most commonly used methods is BMI due its ease of use. The calculation for this is BMI = weight (in Kg)/height (m)

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