For Basal Metabolic Rate - Tanita MC-180MA Instruction Manual

The New Regression Formula
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It has long been said among medical and nutritional specialists that "The Basal Metabolic Rate (BMR) is determined
more by the Fat Free Mass (FFM) than by the body weight" (Persons of a given body weight with a higher FFM
will have a higher BMR) and that, from the aspect of evaluating body composition, should be estimated from the
FFM. In addition, in cases of simple estimation formulae where calculations can be based on height, weight and
age without evaluating body composition, there was a problem height, weight and age, without evaluating the
body composition, there was a problem with excessively high evaluations being given to obese persons with a
large body weight and, conversely, excessively small BMR evaluations given to muscular athletes, though these are
not as many in number.
Currently, the BMR estimation recursion formula developed by Tanita, the manufacturer of body composition
analysers, and based on their research, works by multiple regressive analysis using this FFM, and has a higher
degree of accuracy in terms of the individual differences in body composition. In order to derive the BMR, resting
respiratory metabolism (Resting Energy Expenditure: REE) was measured using a breath gas analysis device, and
this estimation recursion formula was created based on this data.
<Figure 1> The Relationship Between Resting Energy Expenditure (REE) According to Breath
Gas Analysis and Weight, FFM
(Presented at Nutrition Week, held in San Diego in 2002)
As shown in Figure 1: the REE (BMR) has a stronger relationship to the FFM than to body weight, and a
difference is visible between males and females in the distribution trends. We see that, in principle, we should
calculate from the FFM rather than by the old formula centred on the relationship with weight.
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for Basal Metabolic Rate (BMR)
<Figure 2> Comparison of BMR Values from the TANITA Multiple regression model and Breath
Analysis
(Presented at Nutrition Week held in San Diego in 2002)
The current BMR retrogression formula is a formula that acts on the principle of using the FFM value from the
results of body composition measurement according to the BIA, A good relationship is shown in the BMR value
based on actual breath analysis REE or R=0.9 (p<0.0001). These results were presented at the First Annual
Nutrition Week (American College of Nutrition, American Society for Clinical Nutrition, American Society for
Parenteral and Enteral Nutrition, North American Association for the Study of Obesity) held in 2002 in San Diego.
NOTE: This model has been calibrated for persons aged 18-84. Those individuals falling outside this age range
may not be able to obtain accurate readings.
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