Calcolatore BMR
Calcola il tuo Metabolismo Basale per sapere quante calorie il tuo corpo brucia a riposo
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.
Get Your Personalized Workout Plan
Turn your calculator results into action. Sign up for free to get AI-powered workout plans tailored to your body metrics and fitness goals.
Create Free AccountCos'è il BMR?
Il Metabolismo Basale (BMR) è il numero di calorie di cui il tuo corpo ha bisogno per svolgere le funzioni vitali di base mentre sei a riposo completo. Queste funzioni includono la respirazione, la circolazione sanguigna, la produzione cellulare, l'elaborazione dei nutrienti e la regolazione della temperatura. Il BMR rappresenta tipicamente il 60-75% del tuo dispendio calorico giornaliero totale, rendendolo la base per calcolare le tue esigenze energetiche complessive.
Formule BMR Spiegate
Le formule BMR più comunemente usate sono l'equazione Mifflin-St Jeor e l'equazione Harris-Benedict. L'equazione Mifflin-St Jeor (sviluppata nel 1990) è considerata più accurata per le popolazioni moderne: BMR = 10 × peso(kg) + 6,25 × altezza(cm) - 5 × età + 5 (uomini) o -161 (donne). La più vecchia equazione Harris-Benedict (1918) tende a sovrastimare il fabbisogno calorico ma è ancora ampiamente usata in ambito clinico.
Fattori che Influenzano il BMR
Diversi fattori influenzano il tuo BMR oltre a età, peso, altezza e sesso. La massa muscolare aumenta significativamente il BMR poiché il tessuto muscolare brucia più calorie del tessuto adiposo. Anche gli ormoni (specialmente quelli tiroidei), la temperatura corporea, il clima, i livelli di stress e la genetica giocano ruoli importanti. Le diete drastiche possono abbassare il BMR mentre il corpo si adatta per conservare energia, motivo per cui si raccomandano approcci sostenibili alla gestione del peso.
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.