Resting metabolic rate testing - Cheshire
Know exactly how many calories your body burns. Train, fuel and lose weight with precision.
What is Resting metabolic rate testing?
Resting Metabolic Rate testing is the most accurate way to understand how many calories your body burns at rest. At Perform180, we help runners, gym-goers, athletes, and anyone focused on body composition uncover their true energy needs through precise, lab-grade metabolic testing.
Our testing process provides actionable insight that watches, apps, and online calculators simply can’t match. By measuring your oxygen consumption at rest, we can identify your personalised daily calorie baseline, giving you a clearer starting point for nutrition, fat loss, performance fuelling, or long-term health goals.
Whether you’re trying to lose body fat, fuel training properly, avoid under-eating, or finally understand why generic calorie targets haven’t worked, RMR testing gives you the clarity and confidence to make smarter decisions with your nutrition and training.
How our RMR test works
Your resting metabolic rate is measured using indirect calorimetry, the same lab-grade method used in research and clinical settings. While you rest quietly, a metabolic analyser measures the oxygen you consume and the carbon dioxide you produce breath-by-breath. Because energy production is directly tied to oxygen use, these gas exchange measurements let us calculate exactly how many calories you burn at complete rest.
The test is simple and completely non-invasive. You rest in a comfortable position for around 20 minutes while we record your data, with no exercise and no needles. To make sure the reading reflects your true resting metabolism, you’ll attend fasted and well rested. The full session takes approximately 45 minutes, including a pre-test consultation and a detailed debrief where we explain your results and what they mean for your goals.
No guesswork. No generic formulas. Just precise, objective data about your metabolism.
What data do you get from your RMR test?
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The calories your body burns at complete rest just to keep you alive, measured directly rather than estimated from a generic formula. For most people this is 60 to 75% of total daily energy use, making it the single most important figure for setting accurate nutrition and weight-management targets.
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Your measured RMR combined with an activity factor to estimate the total calories you burn across a typical day. This is your real-world starting point for a fat-loss deficit, a performance surplus, or maintenance.
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Your respiratory exchange ratio reveals the balance of fat versus carbohydrate you burn at rest. It shows how efficiently your body uses fat as a fuel and can flag whether your metabolism is leaning more heavily on carbohydrate than expected.
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Clear, individualised intake recommendations built from your actual numbers, whether your goal is losing body fat, fuelling training, or maintaining a healthy weight, not a one-size-fits-all calculator estimate.
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Your measured RMR benchmarked against the value standard equations would predict for your age, sex, height and weight, so you can see whether your metabolism is running faster, slower, or in line with expectations.
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How efficiently you use oxygen to cover each kilometre of running. Two athletes with identical VO₂ max values can have substantially different race performances based on economy alone. Tracking this over time gives you a direct window into the real-world impact of your training and technique.
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Five physiologically-anchored training zones built entirely from your own thresholds — not age-predicted formulas, not resting heart rate estimates. Zones that reflect your actual physiology and make every session count.
Why you should get a VO2 max test
Most people train on assumptions. The best train on data.
Without testing, your training zones are a best guess, borrowed from a generic age formula or a number off your watch. You might be grinding through "threshold" sessions that are actually too easy to drive adaptation, or burning matches in zones too hard to sustain. Either way, you're spending real hours and real effort on a plan that was never built for your body.
A VO₂ max test replaces that guesswork with your actual physiology.
Training without it: zones based on formulas, sessions you hope are in the right range, plateaus you can't explain, and no clear idea whether you're improving the system that's actually holding you back.
Training with it: zones built from your own thresholds, every session targeting the right energy system, a clear picture of your aerobic ceiling and how to raise it, and the ability to track exactly what is working and why you have or haven’t made progress.
If you're putting in the hours, the question isn't whether you can afford to test , it's whether you can afford to keep guessing.
Our other services
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Full Performance profile
Together, we outline a path forward that’s realistic, strategic, and tailored to your specific needs.
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VO2 + Lactate
You’re part of the process. We keep communication open and decisions shared—no black boxes or surprises.
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Lactate testing
When we deliver, it’s not just a finished product—it’s a solution you can trust, backed by real care and effort.
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RMR testing
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Frequently Asked Questions
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The full session takes approximately 60–75 minutes, including a pre-test consultation, the active ramp protocol (typically 8–20 minutes), and a results debrief where we walk you through every metric and what it means for your training.
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Not at all. We test everyone from club runners to competitive professionals. The data is equally valuable at every level — and athletes earlier in their development often see the biggest gains from applying threshold-based training for the first time.
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Arrive rested and avoid strenuous exercise for 24-48 hours beforehand. Avoid a heavy meal in the 2-3 hours prior, and arrive well hydrated. We’ll send you a full pre-test protocol when you book.
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We can test on either. Most runners choose the treadmill; cyclists typically prefer the bike. If you’re unsure, we’ll advise you at the point of booking.
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A big one. In a controlled trial, people who trained to individually tested thresholds gained more than double the fitness of those using generic formula-based zones — and every single one of them improved, versus fewer than half on the standard method. Accurate zones mean every session targets the right intensity, so less effort is wasted.
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A VO2 max test uses breath-by-breath gas exchange analysis to measure oxygen and CO2, giving you ventilatory thresholds, fat oxidation data, running economy, and your true aerobic ceiling. A lactate test uses blood samples taken during a submaximal protocol to directly measure lactate accumulation at each exercise intensity. Both identify your thresholds, but through complementary methods - and together they give a richer, more complete picture than either alone. For most serious endurance athletes, we’d recommend our combined VO2 max and lactate test, or our Full Performance Profile if you want the most comprehensive physiological dataset we offer.
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Wrist-based estimates rely on heart-rate algorithms and assumptions, not actual measurement of the air you breathe. Studies show consumer watches can be off by 10–15%, and they tend to get less accurate the fitter you are — one study found Garmin underestimated trained runners by over 6 ml/kg/min. They're great for tracking trends day to day, but for setting training zones and making real decisions, you want your actual numbers, not an estimate. A lab test measures your true oxygen uptake breath-by-breath and pinpoints your real thresholds.
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How often you get a VO2 max test depends entirely on the level of insight you are looking for. As your physiology changes re testing allows you to track what is working and adjust your training to suit your new markers. Some people do a one off test but most re test every 3,6 or 12 months.