BMI

Body Mass Index (BMI) is a popular tool used by many health professionals. However there is some confusion of what this really is and what it really means. BMI is simply a calculation of the ratio of weight to height; the number is then associated with a classification. BMI is found by taking weight in kilograms divided by height in meters squared OR weight in pounds multiplied by 703 and then divided by height in inches squared. The current classifications are as follows:

BMI	Classification
<18.5	Underweight
18.5-24.9	Normal
25-29.9	Overweight
30-34.9	Obese
35-39.9	Severely Obese
>40	Morbidly Obese

What BMI does NOT measure is body fat percentage. Other means estimate this such as skinfold testing, hydrostatic weighing, and DEXA scanning. During my undergraduate work, I found BMI classifications to be inaccurate amongst several of my classmates since it does NOT take it to account muscle mass or bone density. Therefore, a body builder who is in very good shape could be classified as overweight and a small framed woman who is of a healthy weight could be classified as underweight. For these reasons I ruled out BMI as inaccurate and thought it not to be beneficial.

Since this time I have worked in various locations with the general public and found BMI to be a fairly accurate dipiction of weight classification. For the most, BMI gives an appropriate weight classification for the GENERAL PUBLIC; this does not include everyone such as athletes and those with certain diseases. BMI is just ONE way of  measuring health status and is a quick tool for health professionals. It is a good tool, but does NOT give the whole picture of health. That being said someone could have a "normal" weight and be very unhealthy. Continue to maintain or work towards a "normal" BMI, but more importantly work on being HEALTHY!