Which variable is NOT included in the Mifflin-St. Jeor equation according to the source material?

Which variable is NOT included in the Mifflin-St. Jeor equation according to the source material?

• A. Ethnicity
• B. Weight
• C. Height
• D. Age

Answer: (A)

The equation estimates resting energy expenditure from body size and sex, not demographic categories like ethnicity. It uses weight and height as the main size measurements and age to adjust for metabolic changes with aging. The difference between men and women is captured by a different constant term (+5 for men, -161 for women), but there is no ethnicity coefficient at all. That’s why ethnicity is the variable not included in the standard Mifflin-St Jeor equation. If you then convert BMR to total energy expenditure, you apply an activity factor, but ethnicity still isn’t part of the calculation.

The equation estimates resting energy expenditure from body size and sex, not demographic categories like ethnicity. It uses weight and height as the main size measurements and age to adjust for metabolic changes with aging. The difference between men and women is captured by a different constant term (+5 for men, -161 for women), but there is no ethnicity coefficient at all. That’s why ethnicity is the variable not included in the standard Mifflin-St Jeor equation. If you then convert BMR to total energy expenditure, you apply an activity factor, but ethnicity still isn’t part of the calculation.