What Exactly is BMI or Body Mass Index?

When you embark of lifestyle changes, you will hear your Healthy & Active counsellor, dietician or naturopath speaking about your BMI.

The Body Mass Index or BMI as it is known in it short form is a calculation that estimates whether or not you are at a healthy weight.  This is important as being overweight puts a strain on your heart and can lead to health problems like high blood pressure, high cholesterol, stroke, varicose veins, sleep apnea, heart disease and Type 2 diabetes.

How Does It Work? 

Your BMI estimates how much you should weigh, based on your height. Here are the steps that are used to  calculate this formula:

• Multiply your weight in pounds by 703.
• Divide that answer by your height in inches.
• Divide that answer by your height in inches again.
• For example, a woman who weighs 270 pounds and is 68 inches tall has a BMI of 41.0.

The BMI is a set of standards known as the Body Mass Index Categories. The standards are stated as below.

BMI CATEGORY

• Below 18.5    Underweight
• 18.5 - 24.9     Healthy
• 25.0 - 29.9     Overweight
• 30.0 - 39.9     Obese
• Over 40          Morbidly obese

Most experts conclude that a BMI greater than 30 (obesity) is unhealthy. The greater it is the more likely you are to develop a health production.

BMI may become important when it comes time to apply for health insurance. You can be denied health insurance if you have a BMI over 30.

Results or Effects 

Calculating your BMI is usually an accurate way to determine whether or not you can lose weight. This is true unless you are very old, a child or a body builder.

The reason that the standard BMI calculations may not apply to body builders is because they usually have more muscle and muscle weighs more than fat. This throws the calculation off. Fitness experts and trainers have other ways of calculating body index mass for body builders.

The elderly are expected to have a BMI that is between 25 and 27 and not under 25. This is because being too thin is not a sign of health in the elderly. Having more BMI is an indication that their bones are not developing osteoporosis.

The BMI is not an appropriate tool to use estimate a child’s fitness. To make a correct assessment of a child’s BMI there are numerous factors to consider. That is why it is best to have a doctor decide whether or not your child has a health body mass index.

For more information about the Healthy & Active Program please visit our website at www.healthy-active.com. You may also call us in Toronto at (41) 440-2217 and ask for Adrienne Wright Bulow or Dr. Michael Rahman or email us at adrienne@healthy-active.com.