BMI versus reality

I’m 166 lbs at 5’7″ and 49 years old. My personal goal weight is 165 lbs. According to BMI, I’m overweight (BMI of 26), and will likely remain in the overweight category even at my goal weight. My body fat percentage is currently between 12-15% depending on the day. I’m pretty darned healthy, with a resting heart rate of 43. I run three-five times a week, and I am physically fit.


I recently found something called the Smart Body Mass Index (SBMI).

This calculator functions on the basis of the newly developed Smart Body Mass Index. The SBMI differs from the BMI in three important aspects.

Firstly, it takes age and sex into account, besides weight and height. Secondly, the SBMI is a purely comparative figure (without any physical units) on a scale of 70 points. And thirdly, the significance of the body weight for your health can easily be derived from the SBMI but not from the BMI: The weight-related health risk levels shown in green, yellow, orange and red (see the SBMI chart on the Results page), are always 10/70 SBMI points wide.

The ideal range of the SBMI is 30/70 to 39/70 or, in words, “between thirty and thirty-nine points out of seventy”.

I like this a lot better than BMI which, it seems to me, leaves out a lot of data points that should be taken into consideration. To think that I’m overweight is laughable. BMI made me feel like I was failing or inadequate in regards to finally being at a normal weight. SBMI, which is a better measure, confirms what I suspected: I’m in the normal range and quite healthy for my age.

Where am I on the SBMI? 38/70. It’s on the high side, but within the healthy range (which is what I’m shooting for).

2 thoughts on “BMI versus reality

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