Roebuck Personal Training

BMI is bulls**t

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I was inspired to make BMI a subject for my blog by an experience my client Phil had,he was given a health test with all his work colleagues (I do think this is good thing for his employees to offer by the way). Phil is in his 50’s and has been fit and active all his life,his body fat is low and has a good amount of lean muscle (see pic). He can sprint faster,jump higher and lift heavier more than most 30 year olds (if your reading this Phil don’t get too big headed I still aim to beat you when I’m in my 50’s ;b). He still plays lacrosse and cricket aswell as personal training and classes. His health test came back his BMI reading classes him as overweight as you can see from his pic this is simply false. Why do we use BMI and why is it so flawed read on to find out.
BMI is a basic equation your body weight (kg) divided by the square of your height (feet). This equation was devised in 1832 yes that’s right 1832,think about that for a second are doctors using anything from that era now? Back then doctors used to bleed you if you had a headache believing too much blood was causing the pain hmmmm. So why the hell is BMI still being used it may be simple,cheap and easy but if it’s not accurate what’s the point?
This formula has remained the same since its invention it does not take into account skin fold measurements which would measure your adipose fat,bone density now this is a crucial one,if you weight lift your bone density will increase which is a good thing,but this will increase your weight thus your BMI will go up. Muscle mass is not measured,muscle weighs more than fat so even if you’re lean but well built your BMI results will be skewered. BMI was used for collecting data from a large population,but on individuals it simply doesn’t work. Of great concern to me is how it can harm an individual’s confidence and make them feel they are unhealthier than they really are,unaware just how inaccurate it is.
I hope this blog/rant has been useful to anyone who knows their BMI,thoughts on this are most welcome.

About the Author David Roebuck

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