BMI is simply a ratio of your height to your weight. That's why it isn't different for men and women. Interms of FITNESS is is pretty meaningless, but as an overall index of where you fall on the "overweight-underweight" spectrum, it is a very raw, moderately useful tool. Remember, it was concocted over a hundred years ago and used mostly by insurance companies when calculating morbidity rates for life insurance.
It doesn't take into consideration what your weight is made up of. A bodybuilder with 10% body fat could have a very unhealthy HIGH BMI due to being overly muscular. An underweight couch potato could have a low BMI but but "undermuscled and overfat".
It's a tool- no better or worse than the scale!
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9 years at or under goal weight!
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