Calculadora BMR
Calcule sua Taxa Metabólica Basal para saber quantas calorias seu corpo queima em repouso
What is BMR and why does it matter?
BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest to maintain vital functions like breathing and circulation. It accounts for 60-75% of your total daily calorie burn. Knowing your BMR helps you calculate accurate calorie targets for weight loss, maintenance, or muscle gain.
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Create Free AccountO que é BMR?
A Taxa Metabólica Basal (BMR) é o número de calorias que seu corpo precisa para realizar suas funções vitais mais básicas em repouso completo. Essas funções incluem respiração, circulação sanguínea, produção celular, processamento de nutrientes e regulação de temperatura. O BMR normalmente representa 60-75% do seu gasto calórico diário total, tornando-o a base para calcular suas necessidades energéticas gerais.
Fórmulas de BMR Explicadas
As fórmulas de BMR mais comumente usadas são a equação de Mifflin-St Jeor e a equação de Harris-Benedict. A equação de Mifflin-St Jeor (desenvolvida em 1990) é considerada mais precisa para populações modernas: BMR = 10 x peso(kg) + 6,25 x altura(cm) - 5 x idade + 5 (homens) ou -161 (mulheres). A equação mais antiga de Harris-Benedict (1918) tende a superestimar as necessidades calóricas, mas ainda é amplamente usada em ambientes clínicos.
Fatores que Afetam o BMR
Vários fatores influenciam seu BMR além de idade, peso, altura e sexo. A massa muscular aumenta significativamente o BMR, já que o tecido muscular queima mais calorias que o tecido adiposo. Hormônios (especialmente hormônios tireoidianos), temperatura corporal, clima, níveis de estresse e genética também desempenham papéis importantes. Dietas muito restritivas podem reduzir o BMR à medida que seu corpo se adapta para conservar energia, e por isso abordagens sustentáveis para o gerenciamento de peso são recomendadas.
BMR vs TDEE: Understanding the Difference
BMR is your resting calorie burn — what your body needs just to survive. TDEE adds your daily activity on top of BMR. Think of BMR as your body's idle fuel consumption and TDEE as total fuel including driving. Never eat below your BMR; use TDEE to set your daily calorie target.
Frequently Asked Questions
What is the difference between BMR and TDEE?
BMR (Basal Metabolic Rate) is the calories your body burns at complete rest just to maintain basic functions like breathing and circulation. TDEE (Total Daily Energy Expenditure) includes your BMR plus calories burned through physical activity, digestion, and daily movement. TDEE is always higher than BMR.
Which BMR formula is most accurate?
The Mifflin-St Jeor equation is considered the most accurate BMR formula for most people, as confirmed by the American Dietetic Association. It was developed in 1990 using modern population data and tends to be more reliable than the older Harris-Benedict equation.
Can I eat below my BMR to lose weight faster?
Eating below your BMR is generally not recommended. Your BMR represents the minimum energy your body needs for basic functions. Consuming fewer calories can slow your metabolism, cause muscle loss, and lead to nutritional deficiencies. Aim to eat between your BMR and TDEE for healthy weight loss.
How can I increase my BMR?
The most effective way to increase your BMR is by building muscle mass through strength training, as muscle tissue burns more calories at rest than fat tissue. Staying hydrated, getting adequate sleep, eating enough protein, and avoiding crash diets also help maintain a healthy metabolic rate.
Does BMR change with age?
Yes, BMR typically decreases by about 1-2% per decade after age 20, primarily due to loss of muscle mass and hormonal changes. Regular strength training and maintaining muscle mass can help counteract this age-related decline in metabolic rate.