https://korr.com/products/vo2-max-testing-system/

In this episode of Metabolic Mastery from KORR Medical Technologies, Dr. Marc Humbert and Dr. Cameron Garber dig into the other side of metabolism: carbon dioxide. Everyone talks about oxygen uptake, but CO₂ is the missing puzzle piece that reveals what fuel you're burning (fat vs. carbs), how efficiently your systems are working, and why your training sometimes stalls—or takes off.

From Respiratory Exchange Ratio (RER) to threshold detection and heart-rate zone setting, Marc and Cameron show how adding CO₂ data transforms a simple VO₂ snapshot into a precise training prescription. They also explain how CO₂ helps differentiate cardio, pulmonary, and metabolic limitations—and how those insights guide better programming, fueling, and recovery for both everyday athletes and high performers.

What you'll learn

• Why CO₂ is essential: How measuring CO₂ (not just O₂) turns a fitness snapshot into an actionable plan.

• RER, decoded: What the 0.70–1.00 range means for fat vs. carb utilization—and how it shifts with intensity.

• Setting better zones: Using the relationship between heart rate and RER to place truly individualized training zones.

• Metabolic flexibility: What it is, why it matters for performance and health, and how to improve it.

• Thresholds with precision: How CO₂ sharpens aerobic/anaerobic threshold detection beyond O₂-only methods.

• Efficiency & diagnostics: Reading VE/VCO₂ and other patterns to spot cardio, pulmonary, or metabolic inefficiencies.

• Fueling that fits: How substrate data guides on-the-run fueling to avoid bonking and gut issues.

• The training triangle: Balancing frequency, intensity, and duration so progress is steady—not injury-prone.

• Zone 2, done right: Programming volume and recovery to drive fat-adaptation without constant glycogen depletion.

• When hardware matters: Why KORR CardioCoach Max/Pro (with CO₂) unlock deeper insights than O₂-only testing.

Ready to make your testing prescriptive, not just descriptive? Tune in and learn how CO₂ data bridges health and performance—so your workouts finally match your goals.

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Listen to the Metabolic Mastery Podcast:

Apple Podcast: https://podcasts.apple.com/us/podcast/metabolic-mastery/id1812972674

Spotify: https://open.spotify.com/show/2sgLMFv1Z8DwEz87yUpapI?si=29a177a6c6ca4ed4

YouTube: https://www.youtube.com/@korrmed/podcasts

YouTube Music: https://music.youtube.com/playlist?list=PLVCRWXBDdFo_S0OeaAsPv8xTnfajTLc75&si=d4wVUA0jqajkbukB

Amazon: https://music.amazon.com/podcasts/d76834b7-c11a-485f-8010-32b490d49e57/metabolic-mastery