Resting Metabolic Rate Testing
RMR Test: Know What Your Body Burns at Rest
A Resting Metabolic Rate test uses your breathing to estimate how many calories your body needs at rest—giving you a more personal starting point for nutrition and weight-management planning.
In-person testing in Bridgeview, Illinois
Beyond Online Calculators
Use Your Own Metabolism as the Starting Point
Online formulas estimate calorie needs from population averages. RMR testing uses your breathing data to provide a more individualized resting-calorie baseline.
Resting Calorie Burn
See the estimated number of calories your body uses each day while at rest.
Your Individual Baseline
Replace a generic formula with a measurement based on your own oxygen use.
More Informed Planning
Use your result with your activity, goals, and health needs to guide nutrition planning.
Progress Over Time
Compare repeat tests completed under similar conditions when your plan or body changes.
Clear, Useful Results
Leave With a Clear Metabolic Rate Report
The ReeVue measures oxygen consumption and reports your estimated resting energy expenditure in calories per day. Your result can be reviewed alongside your activity, health goals, and nutrition plan.
- See your measured resting calorie burn expressed in calories per day.
- Compare your measurement with an estimate based on personal information.
- Discuss practical next steps with your dietitian in the context of your goals.
Simple From Start to Finish
Your RMR Test in Three Simple Steps
The test is straightforward. Plan for approximately 15–20 minutes, although timing may vary by individual.
Prepare
Follow the pre-test instructions so your body is as close as possible to a true resting state.
Relax and Breathe
Sit or recline comfortably, wear a nose clip, and breathe normally through the mouthpiece until the measurement is complete.
Review Your Result
Receive your result and discuss what it means for your nutrition plan with our team.
See the Test in Action
See How RMR Testing Works
Relax in a comfortable position and breathe normally through a disposable mouthpiece while the device measures your oxygen use. Watch the short video to see the basic process.
Watch video
Prepare for a Reliable Baseline
Before Your RMR Test
Food, caffeine, exercise, and activity can affect resting metabolic rate. Follow these steps unless your care team gives you different instructions.
Avoid meals and caloric drinks during the four hours before your appointment. Water is okay.
Exercise can temporarily raise energy use and affect your resting measurement.
Avoid caffeine for at least four hours. If you can do so safely, avoid nicotine, tobacco, and other stimulants on the day of testing.
Plan to sit or recline comfortably and relax quietly before and during the test.
Keep a light seal around the mouthpiece so all exhaled air reaches the device.
When possible, test at a similar time and under similar conditions for better comparisons.
Please contact our team before testing if you use supplemental oxygen or may have difficulty using a mouthpiece and nose clip. Do not change prescribed medication or oxygen use unless your clinician tells you to.
Ready to Measure Your Metabolism?
Schedule your RMR test at Healthy All Time Nutrition and get a resting-calorie baseline you can discuss with your dietitian.
RMR testing estimates resting energy expenditure and is not a medical diagnosis or a substitute for medical care. Results can be affected by food, caffeine, exercise, illness, medication, and testing conditions.