BMR versus BMI?
The body mass index, or BMI, is a scale that provides an indication of your overall body composition and fat. Your basal metabolic rate, or BMR, is a measure of the amount of energy your body requires to perform its normal vital functions at rest (doing nothing and sleep all day). Your BMI and BMR are related in the sense that a lager body composition is generally associated with a higher BMR. BMR decreases as age increases; this means that as age increases, your metabolic rate decreases.