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In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber dive deep into the science of longevity—what it means, why healthspan matters more than just living longer, and how metrics like VO₂ max and muscular power can help predict and improve your quality of life as you age.

They explore the difference between lifespan and healthspan, debunk common longevity "hacks," and make the case for habits over shortcuts. Using clear visuals (including the now-famous "squared curve" concept), practical examples, and even the inspiring story of Grandma Betty, they lay out the true foundation of healthy aging: strength training, cardiovascular fitness, sleep, nutrition, and meaningful connection.

Whether you're a health practitioner, fitness enthusiast, or simply want to age with vitality, this episode offers an evidence-based, empowering guide to increasing both your years—and the life in those years.

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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 

VO2 & Mortality: https://pubmed.ncbi.nlm.nih.gov/30646252/
Grip Strength & Mortality:
https://pubmed.ncbi.nlm.nih.gov/39587152/
https://pmc.ncbi.nlm.nih.gov/articles/PMC6778477/
Gait Speed & Mortality: https://pmc.ncbi.nlm.nih.gov/articles/PMC3080184/
Lifestyle Factors and Mortality
https://pmc.ncbi.nlm.nih.gov/articles/PMC9979572/
https://pubmed.ncbi.nlm.nih.gov/29712712/
Lifespan & Healthspan: https://pmc.ncbi.nlm.nih.gov/articles/PMC4861644/
Loss of Muscle, Strength & Power with Age
https://pubmed.ncbi.nlm.nih.gov/22934016/
https://pubmed.ncbi.nlm.nih.gov/30048806/
https://pubmed.ncbi.nlm.nih.gov/36268622/
https://pmc.ncbi.nlm.nih.gov/articles/PMC10961295/#CR20

In this episode of Metabolic Mastery from KORR Medical Technologies, Dr. Marc Humbert and Dr. Cameron Garber dig deep into BMI—Body Mass Index. Often misunderstood and misapplied, BMI remains a widely used health metric. But does it still deserve a place in modern fitness and medicine? The doctors unpack the science behind BMI, its historical roots, and its usefulness (or lack thereof) when applied to individuals. They explore the J-shaped mortality curve, risk stratification, the limits of BMI in assessing fitness and fatness, and better alternatives like VO₂ max testing and body composition analysis. Whether you're an athlete, clinician, or simply health-conscious, this episode offers practical insights into how to better understand your health metrics and build a sustainable approach to longevity and performance.

💪 Topics include:

• Why BMI fails to measure fitness and fatness

• The true "sweet spot" for longevity

• Fat but fit vs. skinny fat: What's riskier?

• Muscle quality, metabolic flexibility, and sustainable training

• VO₂ max testing and how it helps optimize your healthspan

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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 

Show Notes:

Mortality
BMI Mortality Risks & Confounders - https://pubmed.ncbi.nlm.nih.gov/27146380/
BMI (J-shaped curve) and Mortality - https://pubmed.ncbi.nlm.nih.gov/30389323/
VO2max and Mortality - https://pubmed.ncbi.nlm.nih.gov/39537313/
AAS use and Mortality - https://jamanetwork.com/journals/jama/fullarticle/2816584
Low lean body mass and Mortality -
https://pubmed.ncbi.nlm.nih.gov/29970408/
https://pubmed.ncbi.nlm.nih.gov/32518354/
Deep belly fat and Mortality - https://pubmed.ncbi.nlm.nih.gov/28671751/
Waist to Height and Mortality - https://pubmed.ncbi.nlm.nih.gov/37770574/
Aerobic & Resistance Training and Mortality - https://journals.lww.com/acsm-healthfitness/fulltext/2023/11000/the_coming_of_age_of_resistance_exercise_as_a.7.aspx
"Fat but fit" implications
https://pubmed.ncbi.nlm.nih.gov/39537313/
https://pubmed.ncbi.nlm.nih.gov/27230640/
https://pubmed.ncbi.nlm.nih.gov/29064474/
https://pubmed.ncbi.nlm.nih.gov/24400816/
https://pubmed.ncbi.nlm.nih.gov/33580798/
Muscle Quality & Impacts
Loss of physical function with aging - https://iris.who.int/handle/10665/66682
Fall risk in elderly - https://pubmed.ncbi.nlm.nih.gov/31095087/
Influence of adiposity on muscle tissue - https://pubmed.ncbi.nlm.nih.gov/23790255/
Importance of muscle quality - https://pubmed.ncbi.nlm.nih.gov/25520782/
Effects of fat infiltration on muscle –
https://pubmed.ncbi.nlm.nih.gov/35980018/
https://pubmed.ncbi.nlm.nih.gov/30620635/
https://pmc.ncbi.nlm.nih.gov/articles/PMC3910392/
https://pubmed.ncbi.nlm.nih.gov/23147096/
Resistance Training & Muscle Health
https://pubmed.ncbi.nlm.nih.gov/37881849/
https://pubmed.ncbi.nlm.nih.gov/38123165/
Metabolic flexibility - https://pubmed.ncbi.nlm.nih.gov/35287953/

In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber dive deep into one of the most crucial, and misunderstood,principles in fitness: Load vs. Capacity. Discover how managing total load (training, stress, sleep, nutrition, life events) relative to your body's capacity is the key to avoiding injury, preventing burnout, and optimizing long-term performance. Learn why VO2 max testing and heart rate zones are essential for precise training, how to balance high-intensity and low-intensity workouts (including the 80/20 rule), and how to run personal "lifestyle audits" to overcome plateaus. Whether you're a beginner, seasoned athlete, or coach, this episode offers science-backed, actionable insights to help you train smarter, stay consistent, and keep progressing for years to come.

Load, capacity, and health: https://pubmed.ncbi.nlm.nih.gov/30254049/
Optimal loading: https://pubmed.ncbi.nlm.nih.gov/25950028/
Load vs Frequency (The envelope of function): https://pubmed.ncbi.nlm.nih.gov/8998861/
​Internal & External Load: https://pubmed.ncbi.nlm.nih.gov/30614348/

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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

Get Your Test Protocols Worksheet Here:

https://korr.com/go/korrs-testing-protocols-worksheet/

In Part 2 of our "Test What You Intend to Measure" series, Dr. Marc Humbert and Dr. Cameron Garber dive deep into the art and science of building precise metabolic test protocols. Whether you're testing VO2 Max, substrate utilization (Fat Max), fatigue resistance, zone recovery, or designing open-ended data collection tests, this episode breaks down how to customize protocols for each client's fitness level, exercise mode, and testing goals.

You'll learn:

• How to properly structure VO2 Max tests for accurate maximum oxygen uptake results.

• Why zone testing requires slower, more granular heart rate ramp-ups.

• How to build substrate utilization protocols to measure fat-burning efficiency.

• The role of fatigue resistance and zone recovery tests in evaluating metabolic flexibility.

• Why individualized protocols ensure safety, better data, and more actionable results.

Perfect for exercise physiologists, trainers, health clinics, and metabolic testing centers using CardioCoach or similar equipment, this episode offers practical tips for optimizing client assessments and designing repeatable, effective protocols.

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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 

 

Get Your Test Protocols Worksheet Here:

https://korr.com/go/korrs-testing-protocols-worksheet/

In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber break down how to design effective metabolic testing protocols to deliver accurate, actionable data. Whether you're performing resting metabolic rate (RMR) tests, VO2 Max testing, substrate utilization, fatigue resistance assessments, or zone confirmation tests, this episode covers the key factors that impact test accuracy. Learn why standardizing test protocols is essential, how to individualize tests for each client, and how pre-test preparation—like fasting, warm-ups, and equipment choice—affects your metabolic data.

Discover practical insights for personal trainers, exercise physiologists, health clinics, and metabolic testing centers looking to optimize VO2 testing, heart rate zone determination, fat-burning efficiency, and athletic performance assessments. Plus, hear a fun experiment on how music influences metabolism using KORR Medical Technologies' CardioCoach system.

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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 

 

In this episode of Metabolic Mastery, brought to you by KORR Medical Technologies, Dr. Marc Humbert and Dr. Cameron Garber dive into the truth about exercise, metabolism, and body composition. Picking up from last week's episode on fast vs. slow metabolism, they break down why traditional views on calorie burn are flawed—and why your daily movement (NEAT: Non-Exercise Activity Thermogenesis) may matter more than your time at the gym.

They explore:

• The calorie pie chart: where your energy really goes

• Why NEAT can burn more than your workouts

• The myth of "you need muscle to burn fat"—and what muscle really does

• The constrained energy model and how your body adapts to exercise

• Why the type of movement matters more than how hard you go

• Practical tips for making your life less efficient (on purpose) to lose more weight

• Why metabolic testing is key to aligning effort with your unique goals

Whether you're a clinician, athlete, or just trying to feel better and live longer, this episode gives you the tools to rethink fitness as a lifestyle—not a punishment. Subscribe and share to keep moving smarter, not just harder.

Notes:

Metabolic Flexibility: https://pubmed.ncbi.nlm.nih.gov/35287953/ 
Constrained Total Energy Expenditure: https://pmc.ncbi.nlm.nih.gov/articles/PMC4803033/ 
Aerobic Exercise & Weight Loss: https://pubmed.ncbi.nlm.nih.gov/39724371/ 
Beyond Weight Loss, Clear Evidence of Benefits of Physical Activity: https://pubmed.ncbi.nlm.nih.gov/30563874/ 
NEAT: https://pubmed.ncbi.nlm.nih.gov/12468415/ 

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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

In this episode of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber break down one of the most common health questions: Do I have a fast or slow metabolism? They debunk popular myths, explain what metabolism truly is, and why it matters far beyond just weight. You'll learn about resting metabolic rate, the role of lifestyle and age, and how metabolic testing can transform the way we approach nutrition, exercise, and long-term health.

Whether you're a clinician, gym owner, or simply trying to optimize your energy and longevity, this episode is packed with practical insights into how your body burns energy, adapts over time, and how you can align your goals with science—not guesswork. Discover how measuring metabolism helps shift the conversation from blame to empowerment—and why the best long-term health strategy is to architect a life full of meaningful movement.

NOTES:

Daily energy expenditure through the human life course: https://pubmed.ncbi.nlm.nih.gov/34385400/ 
Thrifty vs spendthrift metabolisms: https://pubmed.ncbi.nlm.nih.gov/37294042/ 
Metabolic rates of major organs: https://pmc.ncbi.nlm.nih.gov/articles/PMC2980962/ 

 

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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

In this week's episode, Dr. Marc Humbert and Dr. Cameron Garber sit down with Daniel Crumback—Director of Strategic Health and Performance, veteran, physiotherapist, and international exercise physiology consultant. Daniel shares his extraordinary journey from the Canadian military to leading performance testing for elite athletes across the globe.

You'll hear:

• How Daniel transitioned from commanding military hospitals to advising Olympic teams

• Why he's a staunch advocate for individualized testing over one-size-fits-all training

• His insights on VO₂, spirometry, NIRS, and the myths of respiratory training

• Candid thoughts on pseudoscience in the health and fitness world

• Why metabolic testing is essential for matching fitness effort with performance goals

Whether you're a coach, clinician, or curious athlete, this episode delivers deep knowledge, humble wisdom, and a few strong opinions that challenge conventional thinking.

🔗 Learn more about Daniel at strategichealthperformance.com or connect with him on LinkedIn.

👉 Like, follow, and subscribe for more expert insights on performance, physiology, and the science of better health.

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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

 

In this special segment of Metabolic Mastery, Dr. Marc Humbert and Dr. Cameron Garber launch "Contrary to Popular Belief," where they challenge common misconceptions about fitness, fat loss, metabolism, and the role of exercise. From clarifying what zone 2 training should feel like, to explaining why exercise isn't the primary key to weight loss, they unpack powerful truths rooted in science and clinical experience.

They also break down the myth of "fast" vs. "slow" metabolisms and emphasize why lifestyle changes and modern medicine both have a place in optimizing health. Whether you're a clinician, a coach, or someone trying to understand your body better, this episode is packed with actionable insights that will change how you think about fitness, fat loss, and health optimization.

 

Follow KORR:

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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

 

In this episode of Metabolic Mastery, Dr. Marc Humber and Dr. Cameron Garber dive deep into the science and strategy behind Zone 2 training — one of the most effective, yet misunderstood, methods for improving metabolism, endurance, fat-burning, and long-term health.

They break down:

• The physiology behind Zone 2 and why it's essential for metabolic flexibility

• How to identify your true training zones using VO₂ testing

• Why most people train too hard but not hard enough to drive real change

• The proven 80/20 training philosophy used by elite athletes

• How to train smarter (not just harder) to avoid injury and maximize performance

• Why building a "bigger engine" is the key to thriving into old age

If you want to build lasting health, train more effectively, and understand how your body really works — this episode is a must-listen.

👉 Don't forget to like, follow, and subscribe for future deep dives into performance and metabolic science.

 

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LinkedIn: https://www.linkedin.com/company/korrmedical

 

https://korr.com/