Posted by: Roberto | 24 August, 2008

BMI – Body Mass Index

The Body Mass Index (BMI) is one of the most common ways of classifying whether people’s weight is appropriate for their heights. Used by the World Health Organisation, it is a useful indicator of the health risks associated with being underweight, overweight or obese.

BMI is defined as the weight in kilograms divided by the square of the height in metres. BMI=kg/(mxm)

For example: an adult who weighs 70kg and whose height is 1.75m will have a BMI of 22.9.

Category BMI

Underweight 30

Although BMI is a widely used standard method to verify whether a person’s weight is healthy or not, it is not an absolute accurate calculation, as body compositions can vary between individuals.

There are a number of factors that might influence whether or not your BMI is a true reflection of your total body fat.

For instance: muscle is denser than fat and takes up less space. Therefore, an athlete or heavily muscled person (like a bodybuilder) might weigh more than a same sized over-weight person, or two individuals with identical BMI might have widely different body fat percentages.

Moreover, BMI may not be accurate for pregnant or lactating women. Inaccuracies may also occur in older people, as bones may begin to weigh less.

Like any of these types of measures it is only an indication and other issues such as body type and shape have a baering as well. Remember, BMI is just a guide!

Roberto is a qualified personal trainer and massage therapist in London. To contact him, please call 07508 250 126.

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