An invitation to know your metabolism.
A quiet, twenty-minute measurement — and a number you can finally trust.
The number every other number is built on — measured, not estimated.
Find out exactly how many calories your body burns at rest. Then build a nutrition plan grounded in your actual biology, not a calculator’s best guess.
Most of what you’ve been told about your metabolism is a population average wearing your name. The Resting Metabolic Rate test replaces that estimate with a measurement — quiet, considered, and unmistakably yours.
What an RMR test actually measures.
Your Resting Metabolic Rate is the number of calories your body burns just to keep you alive — breathing, circulating blood, regulating body temperature, and powering every cell in your body. It accounts for roughly 60–75% of your total daily calorie burn, which is why guessing it wrong is the single fastest way to sabotage a cut, a bulk, or a body recomposition.
Measured, not estimated.
Online calculators (Mifflin-St Jeor, Harris-Benedict, et al.) plug your weight, age, and sex into a formula and return a guess based on the population average. That guess can be off by 200–500 calories a day if your muscle mass, training history, or genetics fall outside the curve. We measure your metabolism using indirect calorimetry — the clinical gold standard.
How indirect calorimetry works.
You recline quietly in a leather lounge chair and breathe through a soft mask connected to the VO2 Master analyzer. The device measures the oxygen you consume and the carbon dioxide you produce in real time. Because every calorie your body burns requires a precise amount of oxygen, those gas-exchange numbers convert directly into your true resting calorie burn.
Your RMR drives every calorie decision you make.
Whether you’re cutting fat, holding a maintenance window, or building muscle — your RMR is the number every other number is built on. Get it wrong, and the diet underneath it falls apart.
Stop crashing your metabolism.
If you’re slashing 800–1,000 calories below your real RMR, your body responds by lowering thyroid output, dropping NEAT, and burning lean tissue. A measured RMR lets you set a sustainable deficit (typically 15–25% below maintenance) that strips fat without wrecking the engine that’s burning it.
A precise floor beats an aggressive guess.Hold your physique without drift.
Most people unintentionally gain a kilo a year because their estimated maintenance is 100–200 calories too high. A measured RMR plus an honest activity multiplier gives you the actual TDEE band — so you can eat at maintenance and stay at maintenance year-round, without obsessive tracking.
The body you’ve built is worth keeping.Add muscle, not fat.
A clean lean bulk lives in a tight 250–500 calorie surplus. Miss the window high and you put on fat that’ll take a 12-week cut to remove. Miss it low and you stall progress for months. Knowing your true RMR — and re-testing as your body changes — keeps the surplus dialled in.
Lean gains require precision, not appetite.Want to understand the difference between RMR and your full daily burn?
Read RMR vs. TDEE — a four-minute primer on how the two work together.
“Quietness is the protocol.” The BodyStats RMR Room
What to expect at your appointment.
A relaxed, non-invasive experience from start to finish. Plan for about thirty minutes in clinic.
A few considered hours of stillness.
- i.Avoid exercise. No strenuous activity for 6–8 hours before. Elevated post-exercise oxygen consumption (EPOC) can keep your metabolic rate raised long after a workout.
- ii.Fast 2–3 hours beforehand. The thermic effect of food can elevate measured calorie burn by 10–15% and skew your number. Water is fine.
- iii.Skip caffeine and pre-workout. Stimulants raise your resting rate. Aim for the calmest version of you.
- iv.Wear comfortable clothing. You’ll be reclining for the duration of the test.
Twenty quiet minutes of breathing.
- i.Arrive 10 minutes early. Settle in, complete a brief intake form, and let your breathing return to baseline.
- ii.Recline in our lounge chair. The VO2 Master mask is fitted comfortably over your nose and mouth.
- iii.Just breathe normally. The analyzer measures oxygen consumption and CO2 production for ~20 minutes. Most guests close their eyes and zone out.
- iv.Completely non-invasive. No needles, no treadmill, no exertion required. The hardest part is staying awake.
Your numbers, delivered the same day.
- i.Results emailed same day. Your full Metabolic Report lands in your inbox, usually within a few hours.
- ii.Detailed breakdown. Resting energy expenditure (REE), metabolism percentile vs. your age group, heart rate variability, gas-exchange graphs, and daily caloric targets.
- iii.Actionable next steps. We layer activity multipliers onto your RMR so you walk out with calorie targets for fat loss, maintenance, and lean gain.
- iv.Share with your dietitian or coach. The PDF is clinical-grade and ready to hand off to whoever’s programming for you.
Your dashboard — the moment you finish.
Your results land in your private BodyStats dashboard the same day — resting energy expenditure, caloric balance, breathing pattern, and the live gas-exchange graphs from your test, all rendered cleanly in your browser. A four-page PDF version is yours to download or share with your dietitian.
The at-a-glance view of your biology.
Resting Energy Expenditure in kcal/day, metabolism speed compared to your age and sex group, and resting heart rate — the three numbers your dietitian, coach, or doctor will ask for first.
Daily targets, dialled to your real metabolism.
Pick your activity level and weekly goal — the dashboard layers your real RMR with the right multipliers and shows you exact daily targets to cut, maintain, or lean-gain. No spreadsheets, no calculators.
The live test, rendered.
VO2, calorie burn, ventilation, and gas-exchange traces — the same graphs sports scientists and dietitians read to validate the measurement. Settle-in and measurement windows are flagged automatically.
Sample dashboard — your numbers will reflect your personal test.
Clinical-grade equipment, in calm, considered spaces.
We obsess over the details that actually move your number — quiet rooms, comfortable lounge chairs, sports-science-trained technicians, and the same VO2 Master analyzer used by elite training centres and university labs around the world.
- Fast & non-invasive.
- About thirty minutes in clinic. No treadmill, no blood draw — just breathing.
- Clinical-grade accuracy.
- The VO2 Master delivers ±5% precision — trusted by sports scientists, dietitians, and medical clinics worldwide.
- A detailed PDF report.
- Four pages of your numbers: RMR, caloric targets, metabolism percentile, HRV, and gas-exchange graphs.
- Vancouver & Toronto.
- Walk-in friendly clinics in Yaletown, Gastown, and downtown Toronto. Mobile service available on request.
Common questions, quietly answered.
What is an RMR test?
An RMR (Resting Metabolic Rate) test measures the exact number of calories your body burns at rest to keep you alive — breathing, circulating blood, regulating temperature, and powering every cell. At BodyStats, we use the clinical-grade VO2 Master analyzer to measure your oxygen consumption and CO2 production while you recline quietly for about 20 minutes. The result is your personal calorie baseline — far more accurate than any online calculator that estimates from your weight, age, and sex alone.
How long does the RMR test take?
Plan for about 30 minutes in clinic. The actual measurement runs roughly 20 minutes while you recline comfortably and breathe normally through the VO2 Master mask. Add 5–10 minutes on either side for a brief intake, mask fitting, and a walk-through of your results. Your full 4-page metabolic report is emailed the same day — usually within a few hours.
Do I need to fast for an RMR test?
Yes — fast for at least 2–3 hours before your appointment. Eating raises your metabolic rate (the thermic effect of food can elevate measured calorie burn by 10–15%) and skews the result. Also avoid caffeine, pre-workout, and strenuous exercise for 6–8 hours before. Plain water is fine and encouraged. Showing up rested and unstimulated produces the cleanest, most useful number.
How accurate is the RMR test compared to online calculators?
Indirect calorimetry — what we do — is the clinical gold standard for measuring resting metabolism, accurate to within ±5%. Predictive equations like Mifflin-St Jeor and Harris-Benedict estimate from population averages and can be off by 200–500 calories per day, especially if you have above- or below-average muscle mass, an unusual training history, thyroid variation, or genetics outside the curve. The VO2 Master we use measures your metabolism, not the average person’s — which is why it’s trusted by sports scientists, dietitians, and medical clinics worldwide.
Pair your RMR with…
A measured metabolism is the foundation. The picture sharpens when you layer in your body composition, your aerobic engine, and a clear understanding of how it all fits together.
DEXA Scan
The gold-standard scan for body fat, lean mass, and visceral fat — the perfect partner to your metabolic number.
Explore Cardio FitnessVO2 Max Test
Measure aerobic capacity and identify your fat-burning and lactate-threshold heart rate zones.
Explore ReadingRMR vs. TDEE
How resting and total daily energy expenditure work together — and why you need both numbers to plan a diet.
ReadReady to know your true metabolism?
Stop guessing your calories. Reserve a visit in Vancouver or Toronto and walk out with a number you can actually use — same-day report, clinical-grade accuracy, no guesswork.
Reserve your visitCurrent pricing on the pricing page. Questions? Email hello@bodystats.ca or DM @body.stats.