1. What Is The Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is considered one of the most accurate formulas for calculating basal metabolic rate (BMR) - the number of calories your body needs at rest to maintain basic physiological functions.

2. How Does The Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

Where:

• \( Weight \) — Body weight in kilograms (kg)
• \( Height \) — Height in centimeters (cm)
• \( Age \) — Age in years
• \( S \) — +5 for men, -161 for women

Explanation: This equation accounts for the fundamental metabolic differences between genders and the natural decline in metabolic rate with age.

3. Importance Of BMR Calculation

Details: Knowing your BMR is essential for creating effective weight management plans, determining daily caloric needs, and understanding your body's basic energy requirements.

4. Using The Calculator

Tips: Enter your weight in kilograms, height in centimeters, age in years, and select your gender. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BMR and RMR?
A: BMR (Basal Metabolic Rate) measures energy expenditure at complete rest, while RMR (Resting Metabolic Rate) includes minimal activity. BMR is typically slightly lower than RMR.

Q2: How accurate is the Mifflin-St Jeor equation?
A: It's considered one of the most accurate BMR prediction equations, with about 90% accuracy for most populations when compared to laboratory measurements.

Q3: Why does BMR decrease with age?
A: BMR decreases with age due to loss of muscle mass, hormonal changes, and reduced cellular metabolic activity.

Q4: Can I increase my BMR?
A: Yes, through regular exercise (especially strength training), building muscle mass, and maintaining proper nutrition.

Q5: How often should I recalculate my BMR?
A: Recalculate every 3-6 months or whenever you experience significant changes in weight, muscle mass, or age.