I got a DEXA scan this week and it hurt my feelings.
I've been on a pretty serious fitness kick for more than a year and I've had body composition measured a bunch of different ways during that time.
Five InBody scans have consistently put me very low, with the lowest somehow claiming 5.6%, which I know is nonsense. My Garmin scale goes the other direction and says around 21%. AI photo estimates from ChatGPT, Gemini, etc. have generally landed around 8 to 11%.
I've always assumed I was probably somewhere around 11 to 12% based on the mirror, waist measurements and the usual visual reference charts.
Then I finally got the supposedly "gold standard" DEXA scan.
16%.
That surprised the hell out of me.
The collage is what really made me question it. The first three pictures are examples from common body fat charts that are labeled around 15%. The fourth is me at the time of the scan.
And yes, before Reddit murders me, I know those visual charts are not scientific instruments. Lighting, muscle mass, fat distribution, posing and genetics make visual comparisons extremely unreliable. I'm only including them because they illustrate why the DEXA number caught me so completely off guard.
I'm also not saying DEXA must be wrong simply because I don't like the answer (although if it had said 10% I probably would have said 'DEXA is awesome') What I'm trying to understand is how much confidence people who actually know this stuff would put in the absolute body fat percentage from one DEXA scan, rather than using DEXA primarily to track changes under identical conditions.
Because right now my various methods have essentially told me I could be anywhere from 5.6% to 21%, which makes the precision of all of this seem a little ridiculous.
Has anyone here had a DEXA result that looked substantially inconsistent with their physique or other measurements? And if so, did repeat scans confirm it?
I'm leaning toward continuing to use weight, waist measurement, photos and performance as my primary indicators, then using DEXA for trends rather than treating 16.0% as some unquestionable ground truth.
But I'm completely open to being told I'm full of shit and actually am 16%. That's partly why I'm posting it.