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In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber break down one of the most commonly misunderstood areas of exercise physiology testing: how to properly design submaximal and maximal VO2 tests. Whether you're working with elite athletes, deconditioned beginners, firefighters, or everyone in between, the best test isn't the hardest one — it's the one designed to measure exactly what you need to know.

Marc and Cameron walk through equipment selection, protocol design, test length, and the critical indicators that confirm a true VO2 max has been reached. They also explore why calling it "exercise metabolic testing" rather than "VO2 max testing" opens the door to richer, more actionable clinical data — including fat oxidation, lactate thresholds, energy system analysis, and more.

You'll Learn:

• Why "test what you intend to measure" should guide every protocol decision
• How to choose the right exercise modality (treadmill, cycle, rucksack, and more) based on your client's primary activity
• The ideal test length range and how to avoid peripheral fatigue skewing your results
• Key indicators of a true VO2 max: VO2 plateau, RER thresholds, RPE, and age-predicted heart rate percentage
• The difference between VO2 max and VO2 peak — and why it matters clinically
• When submaximal testing is the smarter (and safer) choice
• How the Cardio Coach enables extrapolated VO2 max from submaximal data — and its limitations
• Pre-participation screening tools like the PAR-Q and how they shape your test design
• Why VO2 max alone doesn't tell the whole performance story

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