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Friday, October 16, 2009

The Insight into Body Mass Index

By Wilna Martin

One mistake that many of us make with regard to the whole weight loss subject is one of approaching body weight from an 'absolute weight' point of view. What we mean by an absolute point of view is where one looks at their weight in terms of how much they weigh in kilograms or pounds, and from that measure alone, attempts to make conclusions as to whether they are overweight, underweight or what.

One of those other factors, beyond the figure on the weighing scale, that go into determining what is healthy and what is unhealthy in terms of weight is a person's height. So what the body mass index attempts to do is to tie a person's weight (as reflected on the weighing scale) with that person's height, and from that work out whether that is a healthy or unhealthy weight.

A person's body mass index is therefore a ratio arrived at by dividing a person's body weight by their height. To calculate your own body mass index - which would provide us with a better picture as to whether or not you really need weight loss - all you have to do is first find out what your body weight is (in kilogram), followed by what your height is (in meters), then square the height figure, and divide your kilogram weight by it (in the format BMI = weight in kilograms/(height in meters)2.

The figure that you obtain by dividing weight by height is a better guide as to whether or not weight loss is something you need than the figure you would get by just looking at the weighing scale only. If the figure you obtain after dividing your weight in kilograms by the square of your height in meters squared is anything between 20.1 and 25 - and you are a man, then your weight is ideal, and you only need to take measures to ensure a healthy body weight - rather than weight loss measures - because you really don't need to lose weight (at least from a medical point of view).

In a similar manner, it has been established that ideal body mass index figures for women fall between 18.7 and 23.8, so that if you are a lady, and your BMI falls within this range, then you need not worry about weight loss (at least from a medical perspective), but rather on maintaining your healthy weight.

The body mass index offers a better guide as to whether you really need to lose weight given the fact that weight tends to be relative, and even from a common sense point of view, a 6 foot person weighing 90 kilograms might not sound (and look) as outrageous as a four foot person weighing the same. - 17273

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