Specific FATMAX & Metabolic Efficiency Test

Description

The Power of Glycogen Sparing: Why FATMAX Matters

Even the leanest endurance athlete carries tens of thousands of calories worth of stored body fat, but your liver and muscles can only store about 1,500 to 2,000 calories of carbohydrates. When your carbohydrate stores run dry, you hit the wall—hard. Your FATMAX is the specific intensity zone where your body achieves its peak fat oxidation rate, measured in grams of fat consumed per minute. By discovering this zone, you can deliberately train your body to become metabolically flexible. As you improve your fat oxidation capacity at higher speeds, you “spare” your precious glycogen stores for the late stages of a race, reducing your dependency on heavy fueling gels and protecting your gut from GI distress.

Clinical-Grade Gas Analytics: The CardioCoach Pro Difference

To chart exactly how many grams of fats versus carbohydrates your muscles are oxidizing, a test must measure your precise respiratory gas kinetics. Short ramp tests move too quickly, forcing your body to rely artificially on carbohydrates due to sudden spikes in intensity. Our specialized protocol utilizes extended 5-to-7 minute stages over a 35-minute testing window. This gives your cellular metabolism the necessary time to reach a true steady-state at every single workload. We capture this data using the CardioCoach Pro, a clinical-grade metabolic cart trusted by medical research facilities and elite Olympic sports labs worldwide. By evaluating the precise ratio between inhaled oxygen (VO2) and exhaled carbon dioxide (VCO2), the CardioCoach Pro calculates your exact metabolic substrate utilization with medical-grade accuracy. It maps the precise moment your fuel source shifts, providing an undeniable chemical blueprint of your active metabolism.

What Your FATMAX Diagnostic Report Reveals

The FATMAX Milestone: The exact heart rate, wattage, or pace where your body reaches its maximum fat-burning potential.

The Metabolic Crossover Point: The precise intensity threshold where your fuel utilization flips, and your body transitions into becoming primarily carbohydrate-dependent.

Grams-Per-Hour Caloric Map: A clear, highly actionable table mapping exactly how many grams of fat and carbohydrates you burn at every training intensity, allowing you to calculate your exact race-day nutrition requirements.

What’s Included in Your Assessment

The Extended Metabolic Protocol: A customized 35-minute steady-state test calibrated specifically to your primary discipline (bike trainer, treadmill, or rowing ergometer).

Clinical Breath-by-Breath Tracking: High-accuracy metabolic cart metrics identifying your respiratory exchange ratio (RER) at every workload step.

Personalized Metabolic Efficiency Profile: A detailed digital report mapping your fat/carb crossover curves and localized energy expenditure data.

Fuelling & Strategy Consultation: A 20-minute post-test session to build a targeted nutrition and training strategy to increase your fat oxidation ceiling.

Important Session Preparation Rules

Because this test measures your baseline nutritional mechanics, adhering to these pre-test rules is critical to data validity

Nutritional Fasting: Do not consume food, sports drinks, or caloric snacks for at least 4 hours before your slot. Water is completely fine.

Strict Stimulant Ban: No caffeine, pre-workouts, or nicotine for 6 hours prior to testing. Stimulants alter your nervous system state and artificially suppress fat oxidation tracking.

No Depletion Workouts: Do not perform any exhaustive, muscle-depleting long runs, heavy rides, or extreme fasted workouts within the 24 to 48 hours leading up to your session. Your glycogen stores must be at a normal baseline.

Gear: Bring your primary sport gear (running shoes, cycling kit, or rowing apparel), a towel, and your choice of post-test recovery fuel.