Question 1

What is Basal Metabolic Rate (BMR)?

Accepted Answer

BMR is the number of calories your body needs to perform basic life-sustaining functions at complete rest. This includes breathing, blood circulation, cell production, nutrient processing, and maintaining body temperature. BMR typically accounts for 60-75% of your total daily calorie expenditure.

Question 2

Which BMR formula is the most accurate?

Accepted Answer

The Mifflin-St Jeor equation is considered the most accurate for the general population, predicting BMR within 10% for about 82% of people. If you know your body fat percentage, the Katch-McArdle formula may be more accurate as it uses lean body mass. The Harris-Benedict equation tends to slightly overestimate BMR.

Question 3

What factors affect BMR?

Accepted Answer

Several factors influence BMR: age (BMR decreases about 1-2% per decade after 20), gender (men typically have higher BMR due to more muscle mass), body composition (more muscle means higher BMR), genetics, hormonal status (thyroid hormones significantly affect BMR), body size, and environmental temperature.

Question 4

Can I increase my BMR?

Accepted Answer

Yes, the most effective way to increase BMR is by building muscle through resistance training, as muscle tissue burns more calories at rest than fat tissue. Other factors include staying well-hydrated, getting adequate sleep, eating enough protein, and avoiding prolonged extreme calorie restriction which can lower BMR.

Question 5

Why do I need to know my BMR?

Accepted Answer

Knowing your BMR helps you understand the minimum calories your body needs to function. This is the foundation for calculating your total daily energy needs (TDEE) and creating an effective nutrition plan. Eating significantly below your BMR for extended periods can be harmful and counterproductive to weight loss goals.

BMR Calculator