BODY MASS INDEX

DEFINING OVERWEIGHT AND OBESITY

Overweight and obesity are both labels for ranges of weight that are greater than what is generally considered healthy for a given height. The terms also identify ranges of weight that have been shown to increase the likelihood of certain diseases and other health problems.

If you have used the Body Mass calculator to your right you may be interested to find out how your score relates to what the acceptable values for BMI are.

Body mass index (BMI) is a measure of body fat based on height and weight that applies to both adult men and women.  It may overestimate body fat in athletes and others who have a muscular build.

BMI Score Category
Under    20 Underweight
20 – 24.9 Ideal
25 – 29.9 Overweight
30 -34.0 Obese
35 – 39.9 Class II   Obese
40 + Class III  Obese

If you’d like to calculate your BMI yourself, follow these three steps.

  1. Work out your height in metres and multiply the figure by itself
  2. Measure your weight in kilograms
  3. Divide the weight by the height squared (the answer to Q1)

For example, you might be 1.6m (5ft 3in) tall and weigh 65kg (10st 3lb). The calculation would then be:

1.6 x 1.6 = 2.56. BMI would be 65 divided by 2.56 = 25.39.

Another important aspect to be considered when looking at BMI is your waist measurement.  The waist measurement is often used as an indicator of future health risks from diseases such as diabetes, some cancers, coronary heart disease

MEN WOMEN
Normal   27 – 36.9 inches Normal  23.5 – 31.5 inches
Moderate risk  37 – 40 inches Moderate  31.5 – 34.5 inches
High Risk 40 inches + High 34.5 + inches

To find your TRUE waist, place your thumb on the lowest rib and your index finger on the top of you hip.    Your waist is in the middle of these two markers, do not hold your tummy in, breathe normally.

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