1. What is the Mifflin St Jeor Equation?

The Mifflin St Jeor equation is considered the most accurate method for estimating basal metabolic rate (BMR) and total daily energy expenditure (TDEE). This version calculates Estimated Energy Requirement (EER) for men based on age, physical activity level, weight, and height.

2. How Does the Calculator Work?

The calculator uses the Mifflin St Jeor equation for men:

Where:

• \( A \) — Age in years
• \( PA \) — Physical Activity Level (dimensionless)
• \( W \) — Weight in kilograms
• \( H \) — Height in meters

Explanation: The equation accounts for age-related metabolic changes and different activity levels to estimate daily caloric needs.

3. Importance of EER Calculation

Details: Accurate EER estimation is crucial for weight management, nutritional planning, and determining appropriate caloric intake for health goals.

4. Using the Calculator

Tips: Enter age in years, select physical activity level, weight in kg, and height in meters. All values must be valid (age between 1-120, weight > 0, height > 0).

5. Frequently Asked Questions (FAQ)

Q1: What are the PA level categories?
A: Sedentary (1.0), Low Active (1.11), Active (1.25), Very Active (1.48). Choose based on your daily activity.

Q2: How accurate is this equation?
A: It's considered the most accurate predictor of BMR in non-obese individuals (±10% accuracy).

Q3: Can this be used for weight loss?
A: Yes, subtract 500 kcal/day from EER for ~0.5kg/week weight loss, but consult a professional for personalized advice.

Q4: Is there a different equation for women?
A: Yes, the women's equation is: EER = 354 - 6.91 × A + PA × (9.36 × W + 726 × H)

Q5: Should this be adjusted for body composition?
A: For very muscular or high body fat individuals, adjustments may be needed as muscle burns more calories at rest.