The most accurate method of measuring metabolic rate.

Metabolic rate is a measure of how much food, or fat, is converted to energy in a day. Resting metabolic rate (RMR) is the measurement of how much food, or energy, is required to maintain basic body functions such as heartbeat, breathing, and maintenance of body heat while you are in a state of rest. That energy is expressed in calories per day. So an RMR test shows how many calories you burn at rest, doing nothing more than sitting in a chair.

Our MetaCheck unit directly measures the concentration of oxygen a person breathes out. Each client merely breathes through a simple mouthpiece as all the exhaled air is collected and analyzed. Because there is a direct correlation between oxygen consumed and calories burned (4.813 calories for every milliliter of oxygen consumed), an accurate measurement of oxygen consumption is an effective measurement of calorie consumption.

You can use this information to:

  • Screen for a slowed metabolism that may explain frustrated attempts to lose weight in the past.
  • Reveal changes in a client’s metabolism during the weight loss process that can help trouble shoot a frustrating plateau.
  • Once a goal weight has been reached, an RMR measurement can give you the precise caloric prescription necessary to maintain that goal weight.


Single RMR Test – $100
CrossFit Atlanta Member – $60

Getting Tested

Step 1: Schedule Appointment

Schedule an appointment today by clicking the button below or calling us directly or by email at Be sure to give us your full name, phone number and email and preferred day/time of your test so we can schedule your appointment.

Schedule Your RMR Test Now!

Step 2: Test Preparation

It is desirable to measure a person’s metabolic rate at a true resting level. To ensure one is at rest, we recommend the following preparation:

  • Avoid eating a meal 4 hours before the test.
  • Avoid exercising on the day of testing.
  • If possible, avoid the use of stimulants such as caffeine prior to testing.

Step 3: Testing & Results Review

Taking The Test

  1. The test takes about 10-15 minutes to complete from start to finish
  2. You will sit comfortably with a clip on your nose and the mouthpiece attached to a hose in your mouth, using your lips to seal around the edges. Not to worry, nothing is required of you at this point except to relax, sit still and breathe normally
  3. Your entire appointment will be complete in just under 20 minutes
  4. We will print your results

Step 4: Results Review

Review Your Results

Your results sheet will show the following information:

  • Resting Metabolic Rate
  • Lifestyle and Activity – Calories burned performing daily activities
  • Exercise – Calories burned with 30 minutes at a moderate exercise level
  • How many calories to consume to lose, gain or maintain your current weight
  • Metabolism comparison with others your similar sex, age, height and weight
Download a Sample Test Sheet


What is the effect of dieting on RMR?

Each individual will react differently to dietary changes which is why a true measurement of RMR is so valuable. But if a patient reduces calories, don’t be surprised if their RMR also goes down. This may or may not be in conjunction with weight loss. It is critical to measure those changes periodically to make the necessary adjustments in diet and exercise to stay on track and avoid the dreaded “plateau.”

Does RMR decline with age? Why?

Resting Metabolic Rate declines slightly as individuals’ age. The cause is not clear. One reason may be due in part to a slowed metabolic rate of individual organs, such as the brain, liver, heart, and kidneys. These organs alone account for 60% of RMR in adults, and all but the heart decrease in mass with advancing age. Another cause may be a tendency for decline in physical activity and a sedentary lifestyle that leads to a decrease in lean mass and bone mineral density. (St-Onge)

Does RMR change after weight loss?

Often after a significant weight loss, RMR is depressed even lower than expected relative to the change in body composition. Most researchers point to this as a key factor in the high rate of weight regain among the formerly obese. Identifying this post-diet RMR is a vital step that is key to long term weight loss success. It gives the information necessary to set an appropriate caloric goal for maintenance and teach a patient to eat within the constraints of their new metabolic requirements. (Jequier, Elliot)

Is RMR affected by pregnancy?

Studies show a considerable variation in the individual metabolic response to pregnancy, and thus the additional energy required to support a pregnancy. The individual increases in RMR can range from 456 KJ/d to 3389 KJ/d. Though clinicians often recommend an additional energy intake of 1250 KJ/d to their pregnant patients, the data suggests that this single recommendation is not justified. Metabolic testing would more precisely indicate the caloric needs of individual pregnant patients. (Kopp-Hoolihan LE)

Why measure RMR rather than use predictive formulas?

Predictive formulas have been used for years because an actual measurement through Indirect Calorimetry has not been practical. But the truth is, while predictions might hold their ground statistically, when applied to individuals, they are woefully inadequate. In an examination of published articles examining the validity of various predictive equations, Frankenfield, Roth-Yousey and Compher found that even the best equation (Miffin-St Jeor) was only within 10% of measured results. While 10% may seem statistically acceptable, for the individual desiring to lose weight, an RMR estimate that is 10% higher (2200 kCals) than an actual measurement of 2000 kCals a day would be significant. That additional caloric intake would result in 21 pounds gained in one year! Additionally, these same researchers noted that errors and limitations with equations exist when applied to individuals, and that “RMR estimation errors would be eliminated by valid measurement of RMR with indirect calorimetry.”

Schedule Your RMR Test Now!

Interested In Body Composition Testing?


With the BOD POD, you’ll experience none of the risks and discomfort associated with underwater submersion, x-rays, electrical current, and pinching with calipers. During testing, you just sit inside the BOD POD for less than 4 minutes.

Learn More About Bod Pod Here