Note that in the BMR/RMR calculator above the lean body mass is automatically calculated using the Boer formula if body fat percentage is not provided. If you know your body fat percentage, lean body mass can be calculated by the following formula: (1 - Body Fat Percentage / 100) x Weight. Males: Ageīoth the Katch-McArdle and the Cunningham formulas use lean body mass to estimate your resting metabolic rate. Both the Katch-McArdle and the Cunningham formulas use lean body mass to estimate your resting metabolic rate. Since the first woman has more body fat and less lean mass, her metabolic age is older than her actual age. That makes their metabolic ages 78 and 18 respectively. Whereas the woman with 20 body fat has a BMR of 1,548. Males: AgeĪs the Schofield equation above was proven not to be very reliable for many, a new series of equations was developed in 2005 which consisted of a database of 10,552 BMR values that had a more diverse set of subjects. Using the Katch-Mcardle formula, the woman with 40 body fat has a BMR of about 1,254 calories. This skewed the results for other communities. However, a disproportionate number of subjects in the data set were Italian men with on average higher BMR values. The Schofield equation was published in 1985 and used by FAO/WHO/UNU (World Health Organization and others). Since publication of its First Edition in 1981, Exercise Physiology has helped more than 350,000 students build a solid foundation of the scientific principles underlying modern exercise physiology.
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