Know exactly how your body burns energy.
PNOE metabolic testing is available at Montana Athletic Club in Bigfork, Montana through the on-site Elysian Institute at 850 Holt Drive — the only PNOE location in the Flathead Valley. PNOE is a medical-grade metabolic analyzer that measures how your body produces and burns energy by analyzing the gases you exhale: specifically oxygen consumption and carbon dioxide production. From those two measurements it calculates your resting metabolic rate, the ratio of fat versus carbohydrate your body burns at different intensities, your VO2 max and personalised training zones.
What PNOE measures
Resting metabolic rate: the number of calories your body burns at complete rest, derived from direct measurement rather than height-and-weight formulas. Fat and carbohydrate oxidation: the ratio of each fuel source your body uses at rest and at different exercise intensities. VO2 max: your maximum rate of oxygen consumption — the single best indicator of cardiorespiratory fitness. Personalised training zones: intensity ranges calibrated to your actual metabolism, not generic percentage-of-max-heart-rate estimates.
How to prepare
Do not eat for at least 3 to 4 hours before a resting metabolic rate test. Avoid caffeine, nicotine and stimulants beforehand. No hard exercise on the day of the test. Arrive early and sit quietly for several minutes before starting. Wear clothing you can exercise in for a VO2 max test. The Elysian team will give you specific instructions when you book.
Frequently Asked Questions
- What is PNOE metabolic testing?
- PNOE is a medical-grade metabolic analyzer that measures how your body produces and burns energy by analyzing the gases you exhale — specifically oxygen consumption and carbon dioxide production. From those two measurements it calculates your resting metabolic rate, the ratio of fat versus carbohydrate your body burns at different intensities, your VO2 max and personalised training zones based on your actual physiology.
- Where can I get metabolic testing in the Flathead Valley?
- Montana Athletic Club in Bigfork offers PNOE metabolic testing through the on-site Elysian Institute at 850 Holt Drive — the only location in the Flathead Valley offering this level of metabolic analysis. Members travel from Kalispell, Whitefish, Columbia Falls and Polson specifically for this test.
- What is the difference between a VO2 max test and a resting metabolic rate test?
- A resting metabolic rate test is done sitting or reclining quietly for 10 to 15 minutes. The result is a precise calorie baseline — how many calories you burn simply existing. A VO2 max test involves a progressive exercise ramp that gets harder in stages until you reach your limit. The result is your maximum aerobic capacity and your true training zones.
- How should I prepare for a metabolic test?
- Do not eat for at least 3 to 4 hours before a resting metabolic rate test. Avoid caffeine, nicotine and stimulants. No hard exercise on the day of the test. Arrive early and sit quietly before starting. Wear exercise clothing for a VO2 max test. The Elysian team will give you specific instructions when you book — follow theirs over any general guidance.
- Does metabolic testing measure my hormones?
- No. Breath analysis measures gas exchange — specifically oxygen and carbon dioxide. It does not measure hormones and cannot assess thyroid function, cortisol or estrogen. PNOE is not a diagnostic test and a result is not a diagnosis. For hormone-related testing, the Elysian Institute’s blood panels are the relevant option.
- How often should I retest?
- Every 3 to 6 months, or after a significant training block. Retesting shows whether your resting metabolic rate has shifted and whether your training zones have changed — both of which happen as fitness improves.
Also at Montana Athletic Club: InBody body composition testing, certified lab blood work, professional fitness testing.