Metabolic Mastery

Ep. 73-Dr.Thomas George: The Doctor Who Lost 120 Pounds:Inside the Science of Adaptive Thermogenesis

Get A Demo: https://korr.com/contact/video-demo/ Dr. Thomas George didn't set out to become an obesity medicine specialist — a traumatic brain injury and a 120-pound weight gain got him there. In this episode of Metabolic Mastery, Dr. Mark Humbert and Dr. Cameron Garber sit down with Dr. George, founder of Wellspring Weight and Wellness, to unpack the science and story behind sustainable weight management. Dr. George shares his own journey from competitive martial artist to 330 pounds and back, and how a neuroendocrinologist's diagnosis changed the way he sees — and treats — obesity. The conversation dives deep into adipocyte biology, why "it's not about the weight," the real data behind adaptive thermogenesis, and why so many patients on GLP-1 medications still hit frustrating plateaus. You Will Learn: Why obesity is best understood as a "disease of diseases" and what that means for treatment How the personal fat threshold and adipocyte hypertrophy drive metabolic dysfunction What resting energy expenditure testing reveals about adaptive thermogenesis — and why its effects can persist up to six years Why GLP-1/GIP medications don't fix metabolism on their own, and what's missing from many prescribing plans How building metabolically healthy muscle protects against weight regain and sarcopenia Why exercise matters more for maintenance than for initial weight loss How cultural food patterns (Mediterranean, Inuit, Hispanic heritage diets) inform sustainable eating Why calorie quality, density, and dosage matter more than any single "diet" Subscribe: https://www.youtube.com/@korrmed

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Ep. 72 - How to Warm Up Clients for Accurate VO2 Max & Metabolic Testing

Get A Demo: https://korr.com/contact/video-demo/ Should every client do a warm-up before a VO2 max test? In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber tackle a question that's surprisingly underexplored in the exercise science literature: how to properly warm up a client before metabolic testing. They break down the three main purposes of a warm-up — transition, familiarization, and priming — and introduce their practical R.E.A.D.Y. framework to help practitioners decide exactly how much (or how little) warm-up a given client needs. From elite athletes to deconditioned beginners, from ramp protocols to fat max testing, Marc and Cameron walk through real-world scenarios, mask familiarization tips, and how to use heart rate as a readiness indicator before you ever hit "start" on the test. You Will Learn: The three primary purposes of a warm-up: transition, familiarization, and priming Why "it depends" is the right answer for whether a client needs a warm-up The R.E.A.D.Y. framework: Reason, Estimate, Acclimate, Dose, and confirming they're ready How to use heart rate stability as a signal that a client is ready to begin testing Why building the warm-up into the protocol can save time without sacrificing data quality Tips for helping clients get comfortable with the mask and equipment before testing starts How to document warm-up protocols in Cardio Coach software for consistent repeat testing When elite athletes need a separate warm-up vs. when to skip it for deconditioned clients

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Ep. 71 - Jody Nelson: Why "Healthy" Habits Aren't Working: A Postpartum VO2 Max Case Study

Get A Demo: https://korr.com/contact/video-demo/ On this episode of Metabolic Mastery, hosts Dr. Marc Humbert and Dr. Cameron Garber are joined by Jody Nelson — KORR's resident metabolic testing expert with a decade of experience and a degree in exercise science — to break down a real client case study. The client: an otherwise fit woman, 18 months postpartum, doing everything "right" — solid nutrition, consistent low-intensity walking — yet stuck in a frustrating weight loss plateau. Her VO2 max test revealed something unexpected: a surprisingly narrow fat-burning zone, a rapid heart rate spike when transitioning from walking to running, and a respiratory pattern that told a much bigger story than the numbers alone. Marc, Cameron, and Jody walk through the respiratory rate and tidal volume graphs in real time, showing how early-test hyperventilation and anxiety can skew substrate utilization data — and why the device is almost never "wrong." They dig into the difference between being fit and being healthy, why perceived exertion is an unreliable guide, and how major hormonal shifts (postpartum, pregnancy, menopause) can scramble a client's ability to accurately read their own body. You Will Learn: Why a narrow fat-burning zone doesn't always mean poor metabolic health — and what else could be going on How to read respiratory rate and tidal volume graphs to spot hyperventilation and test anxiety Why "the device is broken" is almost never the right conclusion when a test result looks unusual The critical difference between being cardiovascularly fit and being metabolically/physically healthy Why perceived exertion is an unreliable training guide and how heart rate data corrects it How hormonal changes during postpartum, pregnancy, and menopause affect metabolic test results Why testing what you intend to measure (and training for the adaptations you want) matters How to ask better follow-up questions instead of jumping to blood work or invasive testing Why "fit" doesn't always mean "healthy" — and what that means for injury risk and longevity

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Ep. 70 - Part 2: How to Design the Perfect HIIT Workout (Using Real VO2 Max Data)

Get A Demo: https://korr.com/contact/video-demo/ In part two of this two-part series, Metabolic Mastery hosts Dr. Marc Humbert and Dr. Cameron Garber shift gears from low intensity training to high intensity — breaking down exactly what HIIT does physiologically, why it works, and how to design intervals that actually match your goals. They start by revisiting the "three zone" model (comfortable, comfortably uncomfortable, and uncomfortable) and explain why moderate intensity — the "no progress zone" — often doesn't drive much adaptation for people who already live there. From there, they dig into the real benefits of high intensity work: rapid VO2 max improvements, stronger cardiovascular pumping, better lactate shuttling, and improved top-end speed and power. A major focus of this episode is debunking the lactic acid myth — lactate isn't a waste product causing muscle burn, it's a valuable fuel source, and understanding how it's produced, transported, and used is key to designing smarter workouts. Marc and Cameron also walk through the "three dials" (oxidative, glycolytic, neuromuscular) and "three clocks" (time under load, interval length, recovery time) framework for designing HIIT workouts with intention — plus why heart rate alone isn't a reliable guide at high intensities, and how VO2 max testing data can pinpoint the exact speed or power to target for real adaptation. You Will Learn: The difference between "comfortable," "comfortably uncomfortable," and "uncomfortable" training zones — and why the middle zone often delivers the least return Why lactate is a fuel source, not a fatigue-causing waste product — and how the body actually clears and uses it The real benefits of high intensity interval training, including rapid VO2 max gains and improved mitochondrial efficiency How to use the "three dials" (oxidative, glycolytic, neuromuscular) to design intervals for specific adaptations Why heart rate lags at high intensity and why speed/power targets (from VO2 max testing) are more reliable How interval length and recovery time change which energy systems you're actually training Why "short term hard, long term easy" beats chasing quick fixes when it comes to fitness and health How to avoid junk volume by matching your training to your actual physiology instead of generic templates The difference between HIIT-style intervals and longer threshold work — and when to use each

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Ep. 70 - Part 1: The Best Workout Doesn’t Exist Here’s What Works Instead

Get A Demo:https://korr.com/contact/video-demo/ Is Zone 2 training the answer or should you spend your limited workout time doing high-intensity intervals? The research can make almost any popular workout sound like the best option, but that advice often overlooks the most important variable: the individual doing the training. In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber explain why effective exercise prescription begins with your goals, physiology, injury history, available time, recovery capacity, and current fitness. They break down how the body’s energy systems work together, why heart rate zone terminology creates confusion, and how social media can turn narrow research findings into sweeping recommendations. You’ll also learn how frequency, duration, and intensity shape an effective training plan; why progressive overload must be balanced with recovery; and what low-intensity exercise uniquely contributes to aerobic capacity, mitochondrial function, and consistency. Marc and Cameron also discuss how metabolic testing with CardioCoach can provide individualized data for selecting the training methods most relevant to a person’s needs. The goal is not to choose the winning exercise camp. It is to find the right combination—and the right dose—for the person in front of you. What You Will Learn Why there is no single best workout for every person or goal How goals, time, recovery, and injury history influence exercise selection Why the body’s energy systems behave more like dials than switches What different heart rate zone models mean when they refer to “Zone 2” How social media can overgeneralize narrowly focused exercise research Why frequency and duration often matter before increasing intensity How progressive overload drives adaptation—and when training becomes too much What low-intensity exercise does for aerobic metabolism and mitochondrial function Why moderate-intensity training may produce fewer new adaptations for some people How metabolic testing can support a more personalized exercise prescription Chapters 00:00 Is there a best workout? 02:23 Why popular workouts become universal recommendations 04:45 Building a personalized exercise prescription 07:00 Energy systems work together 09:28 How the body uses different fuels 11:55 Matching energy systems to your goals 14:18 Why “Zone 2” can mean different things 16:34 What HIIT research does—and does not—tell us 18:55 Frequency, duration, and intensity 21:19 How your training history changes your starting point 23:36 Looking beyond fitness advice on social media 26:02 Adapting exercise to individual limitations 30:43 Treating exercise like a precise prescription 32:59 Specific adaptation and progressive overload 35:08 Finding the right training dose 37:31 The benefits of low-intensity exercise 39:49 Volume, adaptation, and injury risk 42:08 Balancing training stimulus with recovery 44:34 The limitations of moderate-intensity training 46:59 Choosing intensity based on time and goals 49:23 Progressing from walking to higher intensity 51:49 Using individualized data to guide training 54:11 Stop choosing camps and start choosing the right dose

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Ep. 69 - Rethinking Calories & Metabolism with Dr. Carol Ireton Jones

Get A Demo: https://korr.com/contact/video-demo/ The conversation begins with an introduction and background, followed by a discussion of Carol Ireton-Jones's career journey and development. The conversation then delves into research and mentorship, followed by a focus on nutrition and dietary practices. Finally, the discussion explores the concept of food as fuel and satisfaction. The conversation covers the impact of environment on food choices, the role of nutrition in GI health, and the process of creating educational resources for dietitians. It emphasizes the importance of understanding individual health history, financial constraints, and the influence of supermarket environments on food choices. Additionally, it explores the management of GI symptoms, the impact of GI disorders on quality of life, and the role of psychology in GI health. The conversation also delves into the process of creating textbooks and the impact of academic and clinical books on nutrition and GI health. The conversation covered the importance of expertise and nuance in health and nutrition, the value of admitting uncertainty, myths and misinformation in nutrition, challenges of weight loss medications, and how to connect with the expert. The discussion emphasized the need for a multidisciplinary approach to weight loss and the impact of misinformation on health and quality of life. Takeaways Career development in nutrition and dietetics Importance of research and mentorship in the field Understanding food as fuel and satisfaction Understanding the influence of environment on food choices The role of nutrition in managing GI health Admitting uncertainty earns trust and respect Individualized dietary recommendations are crucial for health A multidisciplinary approach is essential for sustainable weight loss Chapters 00:00 Introduction and Background 05:22 Career Journey and Development 13:15 Research and Mentorship 20:31 Nutrition and Dietary Practices 27:26 Food as Fuel and Satisfaction 29:55 The Impact of Environment on Food Choices 36:31 Nutrition and GI Health 52:47 Creating Educational Resources for Dietitians 01:01:40 Expertise and Nuance in Health and Nutrition 01:06:01 The Importance of Admitting Uncertainty 01:13:20 Myths and Misinformation in Nutrition 01:25:33 Challenges of Weight Loss Medications 01:30:01 Connecting with the Expert

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Ep. 68 - Muscle Fiber Types & Training: How to Trigger the Right Adaptations for Your Goals

Get A Demo: https://korr.com/contact/video-demo/ Ever wonder what's actually changing in your body when VO2 max stays flat but your performance improves? In this episode, we break down the hidden adaptations happening at the biochemical, cellular, and tissue levels—and why patience with your training matters more than you think. We dive deep into energy systems (phosphocreatine, glycolytic, and oxidative pathways), explore how different muscle fiber types adapt to training stress, and reveal why rest intervals between workouts can completely change your results. Plus, discover why central fatigue, sleep, and nutrition are often the real limiting factors in your performance. You Will Learn: What metabolic changes occur BEFORE you see improvements in VO2 max How the three energy systems work and which training style targets each one Why rest intervals between sets determine whether you build endurance or power The critical role of muscle fiber type adaptations in athletic performance How sleep deprivation can sabotage your training adaptations (even when everything else is perfect) Why your training plateau might actually be a lifestyle factor, not a programming issue The difference between peripheral fatigue and central nervous system fatigue How to individualize training based on your unique physiology and constraints The importance of metabolic testing beyond just VO2 max numbers Practical frameworks for designing training that actually produces results

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Ep. 67 - The 6 Pillars of Health: Reverse Aging Without Extreme Exercise

Get A Demo: https://korr.com/contact/video-demo/ Is maintenance really possible, or is it a lie? In this episode, we debunk the myth that doing the same fitness routine forever keeps you healthy. Discover why progressive overload matters more than you think, and how the SAID principle (specific adaptation to imposed demands) explains why your body adapts—or declines—based on the demands you place on it. We explore the six pillars of sustainable health, real-world examples of staying young at 90+, and why metabolic testing is your crystal ball for future fitness. Learn how to design a maintenance program that actually works, prevent the 10% VO2 max decline per decade, and combat muscle loss with actionable strategies. You Will Learn: Why "maintenance" requires continuous progression, not repetition How the SAID principle drives aging and fitness adaptations The six pillars of health and how to optimize each one Real data: VO2 max, muscle mass, and metabolic rate changes with age Why activity levels matter more than genetics for longevity How metabolic testing reveals your fitness future and prevents burnout Practical strategies to stay active across all life stages Why your 93-year-old neighbor stays younger than people half his age

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Ep. 66 - VO2 Max vs VLAMax: The Missing Piece in Your Training Program with Sebastian Weber

Learn More From Sebastian: inscyd.com Get A Demo: https://korr.com/contact/video-demo/ Join hosts Dr. Marc Humbert and Dr. Cameron Garber as we explore advanced metabolic testing, energy systems training, and performance optimization with industry-leading experts. In this episode, we dive deep into energy metabolism with Sebastian Weber, founder of Inside and renowned sports scientist. Discover why your current training zones might be limiting your progress, how lactate testing reveals hidden training insights, and the practical applications that separate elite athletes from everyone else. You Will Learn: Why standardized training zones fail (and what actually works) The difference between VO2 Max and VLAMax — and why both matter How lactate production and clearance determine race strategy Muscle fiber recruitment patterns and why you can't neglect glycolytic power Real case studies: Programming for HyROX athletes, cyclists, and endurance performers The truth about fasted training, periodization, and training variation How metabolic data creates a "crystal ball" into what athletes have been doing Why understanding the mechanism behind training beats following trends Perfect for coaches, athletes, fitness professionals, and anyone serious about optimizing performance through science.

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Ep. 65 - Is VO2 Max Testing Just a Fitness Fad? (The Truth)

Get A Demo: https://korr.com/contact/video-demo/ Is VO2 max testing the real deal, or is it just another fitness fad riding a social media wave? In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber pull from their "Fitness Fad Decoder" framework 10 practical questions anyone can use to separate real, sustainable science from hype and apply them directly to VO2 max testing, zone training, and cardiopulmonary exercise testing (CPET). They break down why VO2 max is a powerful, well-validated number, but a dangerous one to chase in isolation and what actually determines whether VO2 max testing will help you build lasting fitness or just become this decade's fleeting trend. You Will Learn: The 10-question "Fitness Fad Decoder" framework for evaluating any health or fitness trend Why VO2 max is a great indicator of fitness but not a complete picture of health or longevity The difference between population-based heart rate zones and physiology-based training zones Why chasing a single VO2 max score can actually increase injury and burnout risk How fat oxidation (fat-burn zone) differs from fat loss — and why the two get confused What determines whether high-intensity training like the Norwegian 4x4 is right for you right now How symptom-limited and submaximal testing can safely inform training for nearly any population Why cardiovascular reserve and muscle mass both matter for long-term health, not just VO2 max How to evaluate research claims and identify influencer overclaims around fitness trends Why investing in accurate metabolic testing may be one of the highest-ROI decisions for your health or your practice

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Ep. 64 - The VO2 Revolution in Performance & Longevity with Stephen Olson of Benchmark Body Metrics

Follow Stephen: Instagram: _stephenolson Get A Demo: https://korr.com/contact/video-demo/ In this episode, Cameron Garber dives deep into metabolic testing with Stephen Olson, founder of Benchmark Body Metrics. Discover why your smartwatch's VO2 estimate might be 20% off, how to build an aerobic base that transforms endurance performance, and the often-overlooked breathing patterns that limit fitness gains. From testing Everest summiteers to diagnosing why runners plateau despite consistent training, Stephen reveals the clinical secrets that separate generic fitness advice from data-driven results. You Will Learn: Why VO2 max correlates with longevity (and what it actually means) The 3 metabolic testing methods that replace guesswork in your training program How to identify your true fat-burning zone—without an expensive device The respiratory limitation that cost one Boston Marathon qualifier 2 years of progress Why testing yourself 200+ times is the fastest path to coaching mastery How to use metabolic data to sell premium coaching packages (business angle) The fat oxidation graph that makes clients immediately "get" their training zones Why 95% of people will choose premium packages when you show them this data first

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Ep. 63 - Why Your Smartwatch's VO2 Max Is Wrong With Daniel Crumback

Get A Demo: https://korr.com/contact/video-demo/ Wearables and influencers have made VO2 max a household term but most of what's being said about it is misleading, oversimplified, or flat-out wrong. In this episode, Dr. Marc Humbert sits down with Daniel Crumback Director of International Sales at KORR, certified exercise physiologist, chartered physiotherapist, and strength and conditioning specialist to cut through the noise around VO2 max, zone training, and metabolic testing. Daniel breaks down why devices measuring O2 only can't actually calculate a true VO2 max, why a high VO2 max doesn't mean someone is metabolically healthy, and how misapplied protocols like the Norwegian 4x4 can do more harm than good when they ignore an individual's actual limiters. Using a real case study a high-performing executive whose cardiovascular numbers looked great but whose metabolic health was quietly falling apart Daniel shows why testing without proper analysis is nearly worthless. You Will Learn: Why VO2 max and VO2 peak are not the same thing, and why that distinction matters Why O2-only devices can't truly measure VO2 max (and what gets lost in the algorithm) How to identify which system — cardiovascular, respiratory, or metabolic — is actually limiting performance Why "zone two" and "zone five" training aren't competing philosophies but serve different physiological purposes What near-infrared spectroscopy (NIRS) can and can't tell you about performance Why lactate testing has real limits — and where marketing claims cross into dishonesty How AI-generated fitness advice can sound convincing while being physiologically inaccurate Why testing to the modality (rather than testing to find true limitations) leads to bad programming How proper zoning through metabolic testing can prevent long-term issues like metabolic disease What separates a trustworthy fitness expert from an untrustworthy one (hint: they say "it depends")

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Ep. 62 - How We Helped a Injured Runner Lose 20 Lbs Without a Weight Loss Program (Real Case Study)

In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber walk through a real-world case study of a female runner in her 40s one who was stuck in a cycle of injuries, told to stop running, and struggling to lose weight despite years of effort. Using resting metabolic rate (RMR) testing, VO2 max data, and evidence-based exercise prescription, they break down exactly how they designed a program focused on injury prevention and performance, and how weight loss followed naturally as a byproduct. You Will Learn: Why telling injured runners to "rest it away" creates a vicious cycle that destroys tissue capacity over time How RMR data revealed this client preserved muscle mass during 12%+ body weight loss Why metabolic adaptation causes RMR to drop 5–30% beyond what fat loss alone explains and how to track it The load vs. capacity framework that allowed this client to run every single day for a year injury-free How Zone 2 training reduced injury risk while actually improving race paces at age 41 Why adherence not the "optimal" program is the single biggest predictor of weight loss success How protein intake (1.6g/kg) and resistance training protect fat-free mass during weight loss The danger of false dichotomies in fitness (HIIT vs. Zone 2, cardio vs. strength) and why both are needed Why bone stress injuries are usually an under-fueling problem, not an overuse problem How to use metabolic retesting to iterate your coaching when results aren't going as expected

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Ep. 61 - Why Research Alone Can't Save You: Applying Science to YOUR Body (N of 1 Explained)

Get A Demo: https://korr.com/contact/video-demo/ In this episode of Metabolic Mastery, hosts Dr. Marc Humbert and Dr. Cameron Garber tackle one of the most misunderstood challenges in health and fitness: how to take population-based research and actually apply it to the individual in front of you — the "N of 1." With an overwhelming flood of new studies published daily, it's easy to either over-rely on research or dismiss it entirely. Marc and Cameron walk through a practical framework for reading research critically, understanding study design, and using metabolic testing data — including VO2 max and resting metabolic rate — to personalize care and training in the real world. You Will Learn: What "N of 1" means and why it matters for your health and training How to evaluate research quality, including study design, population relevance, and statistical vs. clinical significance Why your VO2 max or RMR result may look "normal" but still be telling an important story about your individual trajectory The difference between a research roadmap and a blueprint — and how to stop confusing the two How Bayesian reasoning can help you update your beliefs without flip-flopping on every new study Why placebo effect, natural disease history, and confirmation bias can fool even experienced clinicians How the "evidence-based medicine funnel" works: best available research → clinical expertise → individual goals and constraints Real examples of how metabolic testing reveals outliers that population averages would completely miss Why effect size matters just as much as statistical significance when evaluating any intervention How to run your own mini N of 1 experiments over time using repeat metabolic testing Follow KORR: Instagram: https://www.instagram.com/korrmedical/ Facebook: https://www.facebook.com/korrmedical/ LinkedIn: https://www.linkedin.com/company/korrmedical https://korr.com/ 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

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Ep. 60 - What Your Breath Actually Tells Us About Your Body (And Why It Matters)

Get A Demo: https://korr.com/contact/video-demo/ Have you ever wondered how a device that just measures your breath can tell you how many calories you're burning, what fuel your body is using, and how well your heart, lungs, and muscles are working together? In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber break down the fascinating science behind indirect calorimetry and the CardioCoach — in plain language anyone can understand and explain. You Will Learn: What metabolism actually is — and why it's so much bigger than just weight loss or fat burning How your body's three energy systems (ATP-PCr, glycolytic, and oxidative) work together at every intensity level Why the Krebs cycle and electron transport chain matter for your fitness — explained simply What the Respiratory Exchange Ratio (RER) is and how it reveals whether you're burning fat or carbohydrates How indirect calorimetry calculates calories burned from just your breath — and the foundational science behind it What VO2, VCO2, and VO2 pulse actually mean and what they tell us about your cardiovascular health Why metabolic testing isn't just for elite athletes — and how it can help anyone exercise smarter and live longer Follow KORR: Instagram: https://www.instagram.com/korrmedical/ Facebook: https://www.facebook.com/korrmedical/ LinkedIn: https://www.linkedin.com/company/korrmedical https://korr.com/ 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

Ep. 59 - Fasted Cardio, Cortisol & Fat Burning — What the Science Actually Says

Get A Demo: https://korr.com/contact/video-demo/ Are you optimizing your workouts based on short-term signals that may not actually lead to long-term results? In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber break down one of the most misunderstood concepts in fitness — the difference between what happens in your body during a single workout versus what actually drives lasting adaptation over time. You Will Learn: Why fat oxidation during a workout is NOT the same as fat loss over time The real science behind fasted cardio and train-low strategies — and when they help or hurt Why cortisol and insulin get unfairly demonized, and what they actually do in your body How short-term hormonal spikes (testosterone, IGF-1, cortisol) do or don't predict long-term outcomes like muscle growth Why Zone 2 training drives mitochondrial and cardiovascular adaptation — and how metabolic testing helps you stay in the right zone A practical framework for evaluating health and fitness claims you see on social media Why consistency — not any single workout strategy — is the biggest lever for long-term health Follow KORR: Instagram: https://www.instagram.com/korrmedical/ Facebook: https://www.facebook.com/korrmedical/ LinkedIn: https://www.linkedin.com/company/korrmedical https://korr.com/ 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

Ep. 58 - Debunking the Metabolism Myth: What's Actually Happening to Your Body After 40

Get A Demo: https://korr.com/contact/video-demo/ Think your metabolism fell off a cliff the moment you hit your 40s? Think again. In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber break down the real science behind aging and metabolism — and why most of what you've been told is a myth. You Will Learn: Why aging isn't the real culprit behind weight gain, injury, and metabolic slowdown — and what actually is How your stage of life (not your age) creates the "perfect storm" that wrecks your health The truth about wear and tear, and why your old injuries probably aren't the reason you're still hurting Why NEAT (non-exercise activity thermogenesis) may matter more than your workouts How to use Zone 2 training and metabolic testing to exercise in a way that actually builds you up instead of breaking you down Why muscle is the organ of longevity — and exactly what happens when you lose it Simple, sustainable strategies to defy aging and actually improve with time Follow KORR: Instagram: https://www.instagram.com/korrmedical/ Facebook: https://www.facebook.com/korrmedical/ LinkedIn: https://www.linkedin.com/company/korrmedical https://korr.com/ 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

Ep. 57 - Pro Tips That Will Transform Your VO2 & RMR Testing Results

Get A Demo: https://korr.com/contact/video-demo/ In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber pull back the curtain on the practical tips, shortcuts, and workflows that separate good metabolic testing data from great data. Whether you're just getting started with VO2 max and RMR testing or you've been doing it for years, this episode is packed with actionable knowledge that will immediately improve your results. You Will Learn: How to standardize your pre-test, during-test, and post-test workflow for more consistent, reliable results Why restarting your computer before every test is one of the highest-leverage things you can do The right way to fit a metabolic mask — and how to perform a seal test to confirm it How heart rate straps actually read data (and the common mistake that gives you garbage readings) What causes false highs and false lows in RMR testing — and how to tell the difference How holding the treadmill rail can tank a VO2 test and what to look for in the data The ideal RMR test window and why cutting a test to 10 minutes can cost you accuracy How to interpret true vs. false metabolic values and use them as a clinical conversation starter Software tips for CardioCoach users including custom plots, database backups, and manual heart rate zone selection When to suspect the device vs. the individual — and how to troubleshoot each scenario Follow KORR: Instagram: https://www.instagram.com/korrmedical/ Facebook: https://www.facebook.com/korrmedical/ LinkedIn: https://www.linkedin.com/company/korrmedical https://korr.com/ 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

Ep. 56 - Why Everything You've Been Told About Cardio Is Wrong (According to Science)

Get A Demo: https://korr.com/contact/video-demo/ Is cardio bad for your knees? Does running destroy your joints? Will endurance training make you weak? In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber tackle the most common endurance training myths circulating on social media and break down what the science actually says. They explore why cardio gets such a bad rap, how incorrect dosing — not the activity itself — is responsible for most exercise-related injuries, and why the "cardio vs. strength training" debate is a false choice. The doctors also dig into how VO2 max is a powerful proxy for whole-body health, why your heart actually benefits from endurance training, and how individualized metabolic testing can help you finally exercise smarter, not just harder. You Will Learn: Why "overuse injury" is actually a misleading term — and what's really happening How zone training prevents knee pain and accelerates recovery Why VO2 max is one of the greatest predictors of longevity The truth about cortisol, inflammation, and what exercise actually does long-term Why endurance athletes live longer — and what the data says about strength-only athletes How to dose exercise like a prescription to get results without burning out Follow KORR: Instagram: https://www.instagram.com/korrmedical/ Facebook: https://www.facebook.com/korrmedical/ LinkedIn: https://www.linkedin.com/company/korrmedical https://korr.com/ 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

Ep. 55 - The RMR Test Mistakes Everyone Makes (And How Bad Breathing Ruins Your Metabolic Data)

Get A Demo: https://korr.com/contact/video-demo/ In this episode of Metabolic Mastery, hosts Dr. Marc Humbert and Cameron Garber sit down with Daniel Crumback — KORR's Director of International Sales, certified exercise physiologist, chartered physiotherapist, and certified strength and conditioning coach — for a deep dive into one of the most overlooked data sets in metabolic testing: respiratory values. While most practitioners stop at VO2 max or basic metabolic markers, Daniel reveals how tidal volume, breathing frequency, and lung function norms can expose performance limiters that no one else is talking about. From RMR test quality issues caused by over-breathing, to identifying whether an athlete has a respiratory capacity or capability problem, this episode is packed with clinical insight and real-world testing examples. You Will Learn: Why most RMR tests produce invalid data — and how breathing pattern is usually the culprit What normal tidal volume and respiratory frequency look like at rest and across all training zones How to use the GLI (Global Lung Function Initiative) calculator to establish personalized respiratory norms How to calculate peak tidal volume as a percentage of predicted FEV1 to identify respiratory limitation Why VE (minute ventilation) masks serious breathing problems that individual respiratory values reveal How hyperventilation impairs oxygen delivery, cardiovascular output, core stability, and decision-making The difference between a respiratory capacity limitation vs. a capability limitation — and why the training response is completely different How recovery data after an exercise test reveals critical information about breathing patterns Why you should never remove the mask at the end of a test — and what that post-effort data tells you Practical strategies for improving test quality and helping clients breathe normally during RMR testing Follow KORR: Instagram: https://www.instagram.com/korrmedical/ Facebook: https://www.facebook.com/korrmedical/ LinkedIn: https://www.linkedin.com/company/korrmedical https://korr.com/ 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