Overshot My Recomp Goals – Part 8 – Bod Pod Accuracy

In Part 1 reviewed my [20 Apr 2018] Bod Pod test results against my goals of Body Recomposition.

Part 2 looked at some of the problems with having too low a body fat.

Part 3 looked at the consequences of low body fat with regard to fasting.

Part 4 looked at “Can’t I just eat more?”

Part 5 looked at maintenance diets.

In Part 6 set some goals of fat gain and longer term, muscular gain.

In Part 7 looked at skinfold measurements for body fat percentage.

The Bod Pod result of 7.5% seemed way too low, so I’ve been considering getting a DEXA scan to determine my body fat percentage. I did a quick look at the differences between DEXA and Bod Pod and found this study (Physiol Meas. 2004 Jun;25(3):671-8. Comparison of the Bod Pod and dual energy x-ray absorptiometry in men. Ball SD, Altena TS.). The study found:

The purpose of this study was to compare per cent fat estimates by the Bod Pod to those of DXA in a large number of men. Participants were 160 men (32 +/- 11 years). Per cent body fat was estimated to be 19.4 +/- 6.8 and 21.6 +/- 8.4 for DXA and the Bod Pod, respectively. Although the two methods were highly correlated (0.94), the mean difference of 2.2% was significant (p < 0.01). The amount of difference increased as body fatness increased (p < 0.0001). The results of this study indicate that a difference between methods existed for our sample of men. It is uncertain exactly where the difference lies. Practitioners should be aware that even with the use of technologically sophisticated methods (i.e., Bod Pod, DXA), differences between methods exist and the determination of body composition is at best, an estimation.

So if this is right, the DEXA scan typically gives lower values than the Bod Pod.

 

Author: Doug

I'm an Engineer who is also a science geek. I was pre-diabetic in 1996 and became a diabetic in 2003. I decided to figure out how to hack my diabetes and in 2016 found the ketogetic diet which reversed my diabetes.

One thought on “Overshot My Recomp Goals – Part 8 – Bod Pod Accuracy”

  1. The biggest problem I see according to this study is the nearly +/-8% points they could be off, esp if you’re paying so much for a test. I used to think I wanted to get a test done but now I think the mirror is the best guide. I’d be more curious about a RMR test but those seem to be suspect as well.

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