Absolute Metabolic Testing
Deep insights into your metabolism, energy systems, and fat-burning potential powered by science.
At Absolute Training and Nutrition, we don’t believe in guesswork. We believe in precision.
That’s why we’ve invested in advanced metabolic breath analysis a cutting-edge, non-invasive test that gives you a real-time snapshot of how your body functions at the deepest level. This is not a gimmick. It’s the gold standard for understanding how efficiently your body burns fuel, how your metabolism is functioning, and how we can personalise your program for maximum results.
What Is Metabolic Testing?
Our Absolute Metabolic Testing uses indirect calorimetry a science-backed method that measures the exchange of oxygen (O₂) and carbon dioxide (CO₂) in your breath. This allows us to determine two key things:
Your Resting Metabolic Rate (RMR)
This tells us how many calories your body burns at rest over a 24-hour period a foundational number for accurate fat loss, maintenance, or muscle-building targets.
Your Respiratory Exchange Ratio (RER)
This indicates whether your body is using fat or carbohydrates as its primary energy source at any given time. It also gives us insights into metabolic flexibility, training intensity thresholds, and recovery needs.
Why It Matters
Without this data, most training and nutrition plans are based on broad estimations outdated BMR formulas, calorie calculators, or rough macro splits.
With Absolute’s metabolic testing, we go far beyond that:
No generic calorie targets
We use your metabolic rate not a textbook number to tailor your plan precisely.
Personalised fuel strategies
Knowing your RER means we can adjust your macronutrient balance (protein, carbs, fats) to align with your goals and your body’s current preferences.
Optimised training intensity
By analysing how your metabolism responds under different conditions, we can tailor cardio, strength training, and recovery to ensure optimal fat oxidation and energy use.
Track metabolic adaptation over time
As your body composition, performance, or stress levels change, so does your metabolism. Our system allows us to re-test and re-calibrate your plan for sustained results.
What Does the Science Say?
Studies show that individuals with greater metabolic flexibility (the ability to switch between burning carbs and fat efficiently) tend to achieve better fat loss, improved insulin sensitivity, and greater long-term health outcomes.
(Rynders et al., 2018 – Metabolic Flexibility and Insulin Resistance)
Measuring resting metabolic rate via indirect calorimetry is significantly more accurate than predictive equations, especially for people who are overweight, underweight, or have unique training backgrounds.
(Compher et al., 2006 – ASPEN Guidelines for Indirect Calorimetry)
Individuals who train and eat in alignment with their substrate utilisation (fat vs. carb dominance) see improved energy efficiency, reduced fatigue, and enhanced body composition results.
(Venables et al., 2005 – Determinants of fat oxidation during exercise)
This testing is ideal for:
- Individuals struggling with fat loss despite dieting
- High performers looking to optimise energy systems and recovery
- Anyone wanting clear, scientific data on how their body functions
- Those who have hit a plateau and need a tailored strategy shift
- People with health goals tied to metabolism, inflammation, or hormonal function
No guesswork. Just intelligent, data-led coaching.
This is the future of personal training: a system that adapts to you, rather than forcing your body to adapt to generic plans. At Absolute, we don’t rely on fads, templates, or assumptions.
We use real science, delivered by expert coaches, to give you the absolute best chance of long-term success. Because when you understand how your body works down to its metabolic engine you can finally make lasting change.
