Bod Pod

This involves the estimation of body volume, which requires no radiation at all – so it can be used in pregnancy. You simply sit inside the Bod Pod for a couple of minutes and it measures precisely how much air you displace. Your body’s volume is the difference between the volume of air in the empty Bod Pod and when you’re sitting in it. Because we know the density of fat and that of the rest of your body, we can calculate how much body fat you have