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From Fellrnr.com, Running tips
→Body Fat Scales
''Main article: [[Body Fat Scales]]''
These scales use an imperceptible electrical signal to estimate body fat. This makes these scales quick and easy to use, and the accuracy of the scales that measure from the hands and feet is quite reasonable. I recommend the Omron HBF-510, which retails for about $60-$65 on [[http://www.amazon.com/Omron-HBF-510W-Composition-Monitor-Scale/dp/B001IV61J4 Amazon.com]]
[[File:Omron HBF-510.jpg|none|thumb|200px|The most cost effective body fat scale, the Omron HBF-510.]]
==BOD POD==
This is a chamber that works out your body volume accurately. Given the volume and weight you have the density, from which you can estimate body composition. This is the same principle used in underwater weighing, but far less unpleasant. The test costs about $25 at a gym, which makes it expensive to use regularly. There are two types of BOD POD, a recreational and a research model; The recreational model is used by many gyms and estimates lung function, whereas the research model actually measures lung volume. I found the BOD POD quick and easy, but the combination of the cost and the trip to a gym makes it tricky to use on a frequent basis. See http://www.bodpod.com/ for more details.
