We LOVE a great body transformation… after all measuring transformations is what we do! But one of the reasons I took over at Physique Science and use DEXA with my clients was to help de-emphasise the focus on “weight loss”, and advocate for clients (and their health and fitness professionals) to look more closely at overall body composition as a more accurate measure of progress. About body weight In very broad terms, body weight is made up of fat mass and fat-free mass (whi