Physiological
Testing
Field and laboratory tests to identify your ventilatory thresholds, assess your durability in long-distance events and optimise your nutritional strategy.
A data-driven approach
Training without precise measurements means navigating blind. The protocols used provide a complete mapping of your physiological capacities — for truly individualised training and an optimised race strategy.
Available tests
VT1–VT2 Test
Cycling
Incremental protocol on a calibrated home trainer to precisely identify your two ventilatory thresholds. The foundation of effective polarised training.
VT1–VT2 Test
Running
Incremental protocol on a treadmill to determine your ventilatory thresholds for running. Pace and HR for each energy intensity zone.
Durability
Half Ironman
Specific test simulating accumulated fatigue on a Half Ironman. Measures the performance degradation from bike → run under realistic physiological conditions.
Durability
Full Ironman
Advanced protocol to assess durability over IM distance. Measures the performance degradation from bike → run under realistic physiological conditions.
Exogenous carbohydrate oxidation rate
The most advanced test in our catalogue. Using a carbohydrate drink enriched with carbon-13, we directly measure in expired air the real oxidation rate of carbohydrates ingested during exercise.
- Isotopic drink provided (maltodextrin + fructose ¹³C)
- Expired air collection every 15 min during effort
- Mass spectrometry analysis (¹³C/¹²C ratio)
- Report: oxidation rate, timing, optimal intake (g/h)
How it works
- Continuous HR + power / pace + gas exchange + muscle oxygenation + lactatemia monitoring (depending on the test)
- Individualised intensity zones in HR and pace (running) or power (cycling)
- Interpreted PDF report with individualised zones
- Bike + power meter (cycling test)
- GPS watch or foot pod (running test)
- Chest heart rate monitor recommended
The science behind the tests
Every protocol is based on methods validated by research in exercise physiology. No theoretical calculations — direct measurements.
VT1 corresponds to the first ventilatory threshold (end of the pure aerobic zone), VT2 to the respiratory compensation threshold. These two points define three distinct energy zones — the foundation of the polarised or pyramidal training model validated by research.
In long-distance racing, the question is not only "what is your threshold?" but "how long can you sustain that effort?" and "how do your thresholds (VT1-VT2) evolve under fatigue?" Our tests measure this decline to define realistic and individualised race paces.
The ¹³C tracer (stable carbon isotope) distinguishes the combustion of exogenous carbohydrates from endogenous glycogen. By analysing the ¹³C/¹²C ratio in expired air via IRMS spectrometry, the real oxidation rate in g/min is obtained.
Invest in your data
150€
- Full incremental protocol
- VT1 & VT2 determination
- Individualised training zones
- Interpreted PDF report
240€
- Long-distance specific simulation
- Recommended race paces
- Fresh VT1-VT2 vs VT1-VT2 under fatigue
- Muscle oxygenation monitoring
- RER measurement to calculate % substrate utilisation
- Isotopic ¹³C drink included
- Expired air collection protocol
- IRMS Exoanalytic analysis (partner lab)
- Oxidation rate g/min & recommendations
- Integrated nutrition plan
Ready to know
your numbers?
Book your first test or ask your questions. Reply within 24h.