I was wondering the same exact thing!!!! I remember the last time I had my body fat measured.I didn't come up with an awful reading, but I expected to be in the lean category and I just missed it. I asked the fitness trainer the same thing and he didn't seem to have an answer for me. I am positive that he was pulling empty skin. There didn't seem to be any fat underneath and yet he said it counted.I was so upset I never had it measured again.