1. What is Resting Energy Expenditure?

Resting Energy Expenditure (REE) represents the amount of energy your body needs to maintain basic physiological functions at rest, including breathing, circulation, and cell production. It accounts for the largest portion of your total daily energy expenditure.

2. How Does the Calculator Work?

The calculator uses the REE 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 calculates the basal metabolic rate based on body size, age, and gender differences in metabolism.

3. Importance of REE Calculation

Details: Accurate REE estimation is crucial for determining daily caloric needs, designing weight management programs, and creating appropriate nutrition plans for health and fitness goals.

4. Using the Calculator

Tips: Enter weight in kilograms, height in centimeters, age in years, and select gender. All values must be valid (weight > 0, height > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between REE and BMR?
A: REE (Resting Energy Expenditure) and BMR (Basal Metabolic Rate) are often used interchangeably, though BMR is typically measured under more strict conditions.

Q2: How accurate is this calculation?
A: This equation provides a good estimate for most healthy adults, but individual variations in metabolism can cause differences of ±10-15%.

Q3: Should I use this for weight loss planning?
A: Yes, REE forms the foundation for calculating total daily energy needs, which is essential for creating effective weight loss or gain plans.

Q4: Does muscle mass affect REE?
A: Yes, muscle tissue is more metabolically active than fat tissue, so individuals with higher muscle mass typically have higher REE.

Q5: How often should REE be recalculated?
A: Recalculate whenever there are significant changes in weight, body composition, or every 6-12 months as part of regular health assessment.