To kick off project body recomposition, I decided to get a more accurate body fat percentage measurement.

I already had a Withings scale that measures body fat percentage using Bioelectric Impedance Analysis (BIA) but this method is known for its accuracy problems. BIA is great for analyzing the trend over a longer period of time but to get an accurate measurement, I needed something else.

Fortunately, there are a number of more accurate methods available. The top three, as proposed by Tim Ferriss in the book The 4-hour Body, are:

  1. DEXA

  2. BodPod

  3. BodyMetrix (Ultrasound)


DEXA stands for Dual Energy X-ray Absorptiometry and provides valuable information besides just body fat percentage. In addition, it provides bone density information and splits the body into different zones which is great for highlighting left-right muscular imbalances.

A DEXA session takes around five to ten minutes, costs around 1200 kr ($140) in Stockholm, and can be done at the following places:


BodPod uses air displacement to measure body fat percentage and is a similar, more comfortable, alternative to hydrostatic underwater weighing.

A BodPod session takes ten to fifteen minutes, costs around 450 kr ($53) in Stockholm, and can be done at the following places:

BodyMetrix (Ultrasound)

The BodyMetrix hand-held device uses ultrasound to measure the fat thickness wherever you place it. It connects to both PCs and Macs using USB. The accompanying software can be used to calculate body fat percentage from measurements at specific points on the body.

Ask your local gym if they provide BodyMetrix measurements as a service or get your own device for $495 on the IntelaMetrix website.

I ended up picking BodPod because of its availability and low cost since I want to take measurements on a monthly basis. I did my first BodPod session at Scandinavian Nutrition on Götgatan in Stockholm and paid 400 kr ($47) for it.

I am really looking forward to seeing the results when I do my second session in a couple of weeks.