Please have both tests done, I’ll even pay for it! If their dunk tank is an old fashioned one with a chair and analog scale, it may not be totally accurate, but should still be closer than the bod pod.
Keep in mind, Bod-pod has deep pockets to do PR work and marketing, sometimes claiming they are the new ‘gold standard’ (hydrostatic) or equivalent to. They even ghost write articles that are printed in newspapers and blogs. Their pockets are deep because these machines are cheap compared to building a hydrostatic tank and they’ve sold a lot of them, even overseas. Good for them, they are great business people; I have respect for that, seriously it’s quite an accomplishment to do what they’ve done.
Air displacement plesmography (bod pod) is not an effective way to measure body fat and I don’t think it ever will be equal to hydrostatic weighing. It’s much harder to measure the weight of air than water and there are way too many more variables with it, including what you wear during the test, if you’ve exercised beforehand, if you’ve eaten, and your hydrations levels. Therefore the results will be inaccurate and will not track your progress. How would you know if your hydration level was the same as your last test? I’ve heard many people complain about the accuracy of the bod pod tests as they’ve had results that don’t even make sense. Of course I own bodyfattest.com and therefore biased in my opinion. What I do give them credit for is the ability to test body fat in infants and small children, although I’m not sure that it’s a relevant measure of health or anything else but I’m sure there is something doctors or scientists might use it for. Also for people who have a fear of water, air displacement can at least provide a number for clients to follow. Based on dunking 1,000’s of people and studies (not funded by bod pod), I’d have to say that for most people, calipers will be a more accurate measure. If the bod-pod was accurate you would find them at human performance labs around the country because they are easier to move, low cost, etc., but they don’t have them.
By the way, if you live in any of the cities we are located in or if you visit one, jump in one of our tanks and I’m happy to pay for that test too.
If you do want to take up my offer you’ll need you to provide me the complete reports from the tests, send me a few pictures of yourself without clothes (except a small suit or briefs of course), and give me an idea of your exercise regime and eating habits. Knowing these things I can guess within 1-2% the body fat percentage of 95% of people.
Sincerely,
Robb Kelly
President, Bodyfattest.com
206-427-0898