I am comfortably within the approved BMI for a person of my height. Unfortunately when they measured how much fat I had on my body I was classfied as obese, just, and told that I actually needed to weigh a stone less than I do.
This did not surprise me, I was told some years ago, before BMI that although within the right weight group for my height and build, I had too much fat on my body and needed to lose, then, about 10 lbs.
All these classifications and rules, none can cater for everyone, so whether bird boned, as I seem to be or a muscly rugby player, for some of us the rules can lead us to beleive that we are healthier or less healthy than we actually are.