Body fat - what is the ideal percentage
I've just bought some scales that measure body fat percentage and water ratio as well as weight. My reading comes up at 11.3% body fat, which sounds about right - there isn't a lot of loose flesh on me. However, the booklet that comes with the scales says that the ideal range for men is 17-23% and that anything under 16% is too thin. Does anyone else have any views on this? I am a slim build but I eat like a horse and am not (I don't think) either anorexic or without any bulk (i.e. muscle, which I know isn't fat, but which does disappear pretty quickly if one is genuinely undernourished). Is a lower body fat ratio normal if you are doing more exercise than the average person (as I guess everyone on this forum will be doing)?