RMR_Prepare | CT CHAMP Center

RMR: Prepare for Your Test

Resting Metabolic Rate (RMR) testing uses indirect calorimetry to measure the number of calories your body burns at rest to maintain essential functions. Following these preparation guidelines helps ensure your results reflect your true resting metabolism and minimizes variability caused by food, activity, or other external factors.

Scroll through each tab to learn how to best prepare for your upcoming test!

What to Expect During Testing:

Height and weight will be measured at the start of testing.
You will lie on your back while a clear canopy or metabolic mask captures oxygen (VO₂) and carbon dioxide (VCO₂).
You will be asked to remain as still and relaxed as possible for approximately 45–60 minutes for accurate results.
The test is non-invasive, painless, and suitable for all ages and fitness levels.

Scheduling Considerations:

Testing is most accurate in a fasted, rested state.
Schedule your test at a consistent time of day if tracking over time.
Avoid testing immediately after major diet or training changes. Wait at least 4–6 weeks for adaptations to stabilize, ensuring results reflect meaningful changes rather than short-term fluctuations.
RMR testing may be paired with body composition assessments (DEXA or BodPod) on the same day.
If pairing with exhaustive exercise tests, schedule those on a separate day. RMR requires a fasted state for accuracy and performing high-intensity or exhaustive exercise while fasted can pose safety risks.

Special Considerations for Women:

Menstruation: RMR can fluctuate slightly (±200-300 kcal) across the menstrual cycle due to hormonal changes. Testing in the same phase is recommended for the most accurate longitudinal results.
Pregnancy/Postpartum: RMR testing remains valuable during pregnancy and postpartum. Results should be interpreted within the context of metabolic adaptations that occur during these periods.

RMR: Prepare Page

RMR: Prepare for Your Test

Exercise & Recovery:

Nutrition & Hydration:

Clothing & Equipment:

What to Expect During Testing:

Scheduling Considerations:

Special Considerations for Women: