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The Regression Formula for Basal Metabolic Rate (BMR)
en
The Basal Metabolic Rate (BMR) value is known to be closely related with the Fat Free Mass (FFM). It is
also correlated with body weight, but there are issues when it is calculated from the body weight without
considering body composition evaluation. This causes a greater error range to occur. In cases where people
have the same body weight but different composition, values for obese people that have more body fat are
overestimated, whereas those for muscular athletes are underestimated.
3000
2500
2000
1500
1000
500
0
10
JP Male
3000
<Figure 1> Relationship of BMR from exhalation analysis with weight and FFM
y = x + 9E-11
R
2
= 0.808
R = 0.900
2500
SEE = 131.4
p<0.0001
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1500
1000
500
0
0
500
50
FFM vs BMR
30
50
70
g
FFM k
JP Female
US Male
US Female
1000
1500
2000
Calculated REE kcal/day
（from Multiple regression analysis model）
3000
2500
Male
Female
2000
1500
1000
500
0
90
30
2500
3000
Weight vs BMR
50
70
90
g
Weight k
JP Male
JP Female
US Male
Male
Female
110
130
US Female
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