[Mr. Jeeves]

I don't know, I'm at a BMI of 23.6 and I've still got more fat on me than I would like. I used to think the BMI was way off, but after losing almost sixty pounds on Atkins last year, I don't think that any more - I think the index is a pretty accurate indicator of where I should be. I know I have about ten more pounds I should burn off before next summer.

Obviously, if you are a bodybuilder with more muscle mass, the index is going to look incorrect.

[walden]

Men don't have to be body-builders to be considered fat by this measurement-- my sweetie is a naturally big guy, 6'1" with broad shoulders, and he runs some, walks a lot, and does some upper body weights, so he's fit all over, but the BMI tables call him fat.

[SoDak]

Or, if you have a heavy body structure, it's also thrown off. Some men are built much heavier than others without even significant weight-lifting.