What it stands for: basal metabolic rate/resting metabolic rate
"I have a slow metabolism!" It’s one of the most common laments heard from people trying to lose weight. But unfortunately you can’t draw this conclusion from personal observation alone (I ate a 6-ounce box of chocolates and gained two pounds while my roommate ate an entire Ferrier Roche tower and lost weight!) There is, however, a way to find out how slow—or efficient, as I like to say—your metabolism truly is.
Through metabolic testing, you can find a number known as your basal metabolic rate (BMR) which is how many calories your body uses each day to live and breathe. Your resting metabolic rate (RMR) is a similar measure that tells you how many calories your body uses at rest. (The difference between the two is that BMR is slightly more accurate and requires a more precise test, while RMR is more of an estimate but is easier to measure.)