RMR
testing
Resting metabolic rate testing measures how many calories your body burns at rest—a key piece of data for nutrition and fitness planning.
What is RMR?
Your resting metabolic rate (RMR) is the number of calories your body burns just to keep you alive— breathing, circulating blood, and maintaining organ function while at complete rest.
RMR typically accounts for the largest portion of your daily calorie burn. Knowing this number removes the guesswork from nutrition planning and helps set realistic goals.
The test is quick, non-invasive, and done while you sit comfortably and breathe into a device that measures your oxygen consumption.
Why it matters
Know your baseline
RMR tells you how many calories your body needs at rest. This is the foundation for any nutrition plan.
Stop guessing with calories
Generic online calculators estimate your needs. RMR testing measures them based on your actual physiology.
Inform your weight goals
Whether you want to lose weight, maintain, or gain—knowing your RMR helps you and your provider set realistic calorie targets.
What to expect
RMR testing is quick, comfortable, and straightforward.
Preparation
Avoid exercise, caffeine, and food for several hours before the test. Arrive well-rested.
Relax and breathe
You sit or recline comfortably and breathe normally into a mouthpiece or mask while the device measures your oxygen consumption.
Testing
The test typically takes 15-20 minutes. Stay relaxed—there is no exercise or physical exertion involved.
Results review
Your provider reviews your RMR data and discusses what it means for your nutrition and fitness goals.
Frequently asked
Common questions about resting metabolic rate testing.
RMR stands for resting metabolic rate—the number of calories your body burns at rest to maintain basic functions like breathing, circulation, and cell repair.
BMR (basal metabolic rate) and RMR are similar but measured under slightly different conditions. RMR testing is more practical and widely used in clinical settings. The numbers are usually very close.
Avoid exercise, caffeine, and food for several hours before the test. Come well-rested and plan to sit quietly for about 15-20 minutes during the test.
Not at all. You breathe normally into a mouthpiece or mask while sitting or reclining. There is no exercise or physical exertion involved.
This depends on your goals. If you are making significant changes to your diet or exercise routine, retesting after a few months can help track how your metabolism responds.
Yes. Knowing your actual calorie burn at rest helps your provider set realistic calorie targets rather than relying on estimates. This can be a useful part of a weight loss plan.
Book your RMR test
Find out how many calories your body burns at rest and use that data to guide your nutrition plan.