Also, there are other basal metabolic rate equations which account for lean body mass. Though actual amounts will vary according to person - there are too many variables to take into account to be 100 accurate all the time - a simple BMR calculator will be able to put you in the right ballpark. BMR and RMR are estimates of how many calories you would burn while at rest. Calculating your BMR It’s easy enough to find a rough estimate of your BMR. It is considered that the most reliable one is the Mifflin-St Jeor equation, created in 1990, that is present in the calorie calculator. Calculate the Basal Metabolic Rate (BMR) and the Resting Metabolic Rate (RMR) On this page, the calculator allows the user to calculate the Basal Metabolic Rate (BMR) and the Resting Metabolic Rate (RMR) based on gender, age, weight and height. The most common three prediction equations, beside the Harris-Benedict, are the Mifflin-St Jeor, Owen, and World Health Organization/Food and Agriculture Organization/United Nations University. The study has also highlighted the change in basal metabolism with age. A correlation has been found between the basal pulse rate and the basal metabolism and also between body weight and heat production. Measurements have been taken of 36 men, 103 women and 94 new-born infants and have been analysed biometrically to extract the standard constants. The BMR equations originate in 1918 study conducted by James Arthur Harris and Francis Gano Benedict, which was published in 1919 by the Carnegie Institution of Washington in the monograph A Biometric Study Of Basal Metabolism In Man.
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