1. What is the MSJ EER Equation?

The Mifflin-St Jeor (MSJ) equation estimates energy expenditure at rest (REE) and when combined with physical activity level (PAL), calculates Estimated Energy Requirement (EER). This version is specifically for women.

2. How Does the Calculator Work?

The calculator uses the MSJ EER equation for women:

Where:

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

Explanation: The equation accounts for basal metabolic rate adjusted for physical activity level.

3. Importance of EER Calculation

Details: Accurate EER estimation is crucial for determining daily caloric needs, weight management, and nutritional planning.

4. Using the Calculator

Tips: Enter age in years, physical activity level (typically 1.2-2.5), weight in kg, and height in meters. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What are typical PA values?
A: Sedentary (1.2), lightly active (1.375), moderately active (1.55), very active (1.725), extra active (1.9-2.5).

Q2: How accurate is this equation?
A: MSJ is considered the most accurate equation for estimating REE in healthy individuals (±10%).

Q3: Is there a different equation for men?
A: Yes, the equation for men is: EER = 662 - 9.53 × A + PA × (15.91 × W + 539.6 × H).

Q4: When should EER be recalculated?
A: With significant weight changes (±5-10 kg), changes in activity level, or every 6-12 months.

Q5: Can this be used for weight loss planning?
A: Yes, subtract 500 kcal/day from EER for ~0.5 kg/week weight loss, but consult a professional for personalized advice.