This is just an excuse, like any measurement this pertains to the vast majority of Americans, not the small percentage you speak of.
It really is a limited tool for large frame individuals or groups who have higher bone density and muscle mass. Technically I'm overweight but it's muscle mass.
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BMI Chart Problems
All of the BMI studies cited above were done across large populations.
Using that data and applying it to an individual without looking at the person’s overall health is a bad idea.
BMI calculations do not consider age, gender, frame size, muscle mass, or fat distribution. Subcutaneous fat (under the skin) does not appear to strongly predispose to disease. In contrast, visceral fat (in and between the organs) does.
Someone can have a normal BMI but still have a high visceral fat percentage and be at increased risk for diabetes & heart disease. On the other hand, a sumo wrestler with a high BMI but little visceral fat will be metabolically healthy.
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Additionally, as most people know, essentially all NFL running backs, most of whom sport 6-packs and sub-10% body fat, would be classified as obese under this system. Even a recreational athlete with slightly above-average muscle mass could be considered overweight.
Many doctors calculate patients’ BMI and make recommendations simply based on that number, which is a flawed approach for the reasons given above.
In fact, I just saw a patient for physique coaching who was 5’9″ and weighed 185 pounds.
Despite having a 33-inch waist, 11% body fat, and perfect cholesterol and blood sugar, his primary care doctor was concerned. The doctor told him he must lose 25 pounds if he didn’t want to get diabetes and heart disease!..."