Body Mass Index (BMI) : Not a good tool for you

health May 04, 2023


According to a recent health check I had done.

Which I can only assume is calculated on BMI because it did not indicate how the results were measured. 

The formula is BMI = kg/m2, where kg is a person's weight in kilograms, and m2 is their height in metres squared

BMI does not consider a person's lean body mass (muscle), fat mass, and bone density. 

So why is BMI results like this dangerous??


Imagine I had a terrible relationship with my body and with food. 


Seeing results like this and being told you are “unhealthy” and classified as “overweight or obese” can spiral women into a dark hole of disordered eating, body dysmorphia and eating disorders.



What would be a better tool? 


DEXA - but they aren't easily accessible by everyone and can be costly.

(Dual-energy X-ray absorptiometry is a means of measuring bone mineral density using spectral imaging).


If you ever get a health check done and have a reading from BMI that puts you into a category I mentioned above and you are concerned or worried about this, please seek further advice and source a DEXA scan for a better and more accurate reading of body composition ( lean body mass, fat mass and bone density).


I encourage the girls I coach, particularly those that enter into “build phases, " to get DEXA because scale weight doesn’t show how much muscle you have gained!