The Vitality Collective Podcast w/Dr. Jeremy Bettle

Metabolic Flexibility: Why Health Is the Ability to Adapt | Dr. Mike T. Nelson

The Vitality Collective Podcast is a health and fitness podcast and performance podcast focused on strength, longevity, and real-world performance, bridging the gap between health and performance. Hosted by Dr. Jeremy Bettle, PhD -- an internationally recognized expert in Human Performance with over 20 years of experience working with elite athletes and high performers -- this podcast brings world-class expertise straight to you. Built from elite sport and applied to real life, it breaks down what actually drives resilience, health, performance, and long-term capability. The debate online is loud -- go high carb, go keto, pick a side -- but your body was never designed to pick a side. This episode with Dr. Mike T. Nelson, PhD, a researcher and coach who specializes in metabolic flexibility and heart rate variability, breaks down why the fat-versus-carbohydrate debate is the wrong conversation to be having and what it actually means to train your metabolism to do both well. If you have been asking yourself why you can't sustain energy through the day, why your body composition isn't shifting despite your effort, or why the diet advice you keep finding online seems to contradict itself -- this is the episode for you. Guest Bio Mike T. Nelson, PhD, MSME, CSCS, CISSN, is a research fanatic who specializes in metabolic flexibility and heart rate variability, as well as an online trainer, adjunct professor, Associate Professor at the Carrick Institute, presenter, creator of the Flex Diet Cert, kiteboarder, and (somewhat incongruously) heavy-metal enthusiast. He has a PhD in Exercise Physiology, and a MS in Mechanical Engineering (biomechanics). The techniques he's developed, and the results Mike gets for his clients have been featured in international magazines, in scientific publications, and on websites across the globe. In his free time, he enjoys spending time with his wife, lifting odd objects, reading research, and kiteboarding as much as possible. Links and Resources * Dr. Mike T. Nelson's website: www.miketnelson.com [https://www.miketnelson.com] * Flex Diet Certification: https://miketnelson.com/flex-diet-certification [https://miketnelson.com/flex-diet-certification] * Flex Diet Podcast: https://podcasts.apple.com/us/podcast/flex-diet-podcast/id1488376804 [https://podcasts.apple.com/us/podcast/flex-diet-podcast/id1488376804] * Dr. Mike T. Nelson on Instagram: @drmiketnelson [https://www.instagram.com/drmiketnelson/?hl=en] Three Actionable Takeaways 1. Start your day with a morning walk. As soon as you get out of bed, go for a short walk -- five minutes, ten minutes, half an hour, whatever you can manage. It regulates circadian rhythms, provides early sunlight exposure, gets movement in a low-insulin state, and requires nothing except putting your shoes on and walking out the door. Dr. Nelson called this his single top intervention for the general population. 2. Increase your protein intake from real food sources. Higher protein is one of the highest-leverage nutritional changes most people can make. Dr. Nelson was direct about sourcing: actual grilled or cooked animal proteins, not protein-fortified processed snacks. The compliance barrier is low and the physiologic return is high. 3. Do formal exercise and track your output. Whether you start with lifting or cardio does not matter. What matters is measuring what you actually do. For resistance training: track load, sets, and reps. For cardio: track a concrete output like distance rowed in a set time. Over time, progress that number. The goal is more formal movement done intelligently so you capture both the caloric benefit and the long-term adaptations.

AI, Health, and the Problem with Optimization | Dr. Adam Russell

The Vitality Collective Podcast is a health and fitness podcast and performance podcast focused on strength, longevity, and real-world performance, bridging the gap between health and performance. Hosted by Dr. Jeremy Bettle, PhD -- an internationally recognized expert in Human Performance with over 20 years of experience working with elite athletes and high performers -- this podcast brings world-class expertise straight to you. Built from elite sport and applied to real life, it breaks down what actually drives resilience, health, performance, and long-term capability. Most people treating AI as a search engine are asking the wrong questions entirely. This episode with Dr. Adam Russell, AI Division Director at USC's Information Sciences Institute and former Chief Vision Officer of the US AI Safety Institute, breaks down why AI works as a thinking partner rather than an answer machine, and why that distinction changes everything for your health, your performance, and your organization. If you have been asking yourself how to actually use AI without handing over your judgment, this is the episode for you. What's inside: * Why optimization is the wrong goal in human performance, and what to aim for instead * The jagged frontier: why AI can outperform experts in some areas and completely fail in others, often without warning * The difference between ME AI (using AI for your own tasks) and WE AI (using AI to expand collective intelligence) and why only one of them actually improves outcomes * How AI is acting as a radioactive tracer inside healthcare, exposing where incentives are misaligned long before anyone was willing to name them Guest Bio Dr. Adam Russell is AI Division Director at USC's Information Sciences Institute. He previously served as Chief Vision Officer of the US AI Safety Institute and helped stand up ARPA-H. Earlier he spent a decade as a Program Manager at IARPA and then DARPA, where he became known as the DARPAnthropologist. Adam holds a BA in cultural anthropology from Duke and a D.Phil. from Oxford, where he was a Rhodes Scholar, and played rugby for Oxford and the US Men's National Rugby Team. Links and Resources * Adam Russell on LinkedIn [https://www.linkedin.com/in/ai-nthropologist/]: search Adam Russell, University of Southern California Three Actionable Takeaways 1. Develop an explorer mindset, not an expert mindset. AI is going to keep changing faster than any map can capture. Commit to staying curious, testing tools, and being willing to not know rather than doubling down on outdated expertise. 2. Focus on becoming a better human. AI amplifies what you already are. If you want AI to work well for you, invest first in being the kind of person whose values and judgment you want amplified. 3. Use AI to connect you to other people, not replace them. Rather than using AI to get a final answer, use it to start a better conversation. Bring what you worked through with AI into your interactions with practitioners, colleagues, and coaches as a starting point, not a conclusion.

High Performance Motivation: If I Stop Pushing, Do I Lose My Edge? | Dr. Keith Witt

The Vitality Collective Podcast is a health and fitness podcast and performance podcast focused on strength, longevity, and real-world performance, bridging the gap between health and performance. Hosted by Dr. Jeremy Bettle, PhD -- an internationally recognized expert in Human Performance with over 20 years of experience working with elite athletes and high performers -- this podcast brings world-class expertise straight to you. Built from elite sport and applied to real life, it breaks down what actually drives resilience, health, performance, and long-term capability. Most high performers chase success their entire careers and never actually feel it. This episode with Dr. Keith Witt breaks down why the drive that builds careers can also hollow them out -- and what it actually takes to perform at the highest level without losing yourself in the process. Guest Bio Dr. Keith Witt is a Licensed Psychologist, teacher, and author who has lived and worked in Santa Barbara since 1973. He has conducted over 75,000 therapy sessions and published eight books, including Loving Completely, Shadow Light, and Integral Mindfulness. In presentations and classes around the U.S. and internationally, Keith has explored love, therapy, interpersonal relationships, and development, from multiple perspectives, weaving neuroscience, Integral theory, wisdom traditions, and numerous forms of psychotherapy into a coherent cosmology of love and healing. Links drkeithwitt.com [https://drkeithwitt.com] Three Actionable Takeaways 1. Recognize and use your superpowers. Every person listening has superpowers. Focused intent and action, in service of principle, driven by resolve over time creates real results. Know you have them and aim them where you want to grow. 2. Find someone you trust who has compassion and wisdom in the areas you want to develop. Tell them where you want to grow, receive their input, and embody it. Seek influence from people who genuinely care. 3. Be grateful for the opportunity to be alive, to love, and to grow. Cultivate that gratitude as a daily orientation -- not as a platitude, but as the foundation of a sustainable motivation system. Key Insights 1. Compensatory motivation systems drive you to achieve in order to avoid shame, failure, or loss of identity. Integrative motivation systems drive you to achieve because the work expresses something deeply important to you. Both can produce results. Only one is sustainable. 2. Criterion velocity is the ratio of what you achieve to what you expect to achieve. If you expect progress and make progress, you have a criterion velocity of one. Declaring that a victory is not lowering the bar -- it is the foundation of a growth-oriented motivation system. 3. The arrival fallacy is the belief that reaching the next goal will produce lasting satisfaction. This is a structural problem, not a motivational one. External validation cannot satisfy an integrative need. 4. Celebrating victory is not vanity. It is a biological bonding mechanism. In ultra-social species, shared ecstatic states create group cohesion. Suppressing that response disconnects you from your tribe and reduces performance over time. 5. The harsh inner critic cannot be removed. Attempting to eliminate it does not work. The task is to help it grow from a primitive attack-and-shame mechanism into a functional guide that identifies growth opportunities and moves on. 6. Self-actualization means living your values without obstruction. Self-transcendence, which Maslow added later, is when you stop identifying primarily as a separate person and start identifying as part of something larger. High performers who reach that state tend to have an edge at critical moments. 7. The compassionate witness is the part of you that observes your sensations, emotions, thoughts, judgments, and desires with acceptance and caring intent. Developing that capacity is not about softening standards -- it is about creating the internal stability from which real performance becomes possible. 8. People leave jobs primarily because they feel unrecognized, excluded, or treated unfairly -- not because of money. Organizations that misread this create compounding blind spots in retention and team performance.

Strength Before Supplements: What Collagen Science Actually Shows | Dr. Keith Baar

The Vitality Collective Podcast is a health and fitness podcast and performance podcast focused on strength, longevity, and real-world performance, bridging the gap between health and performance. Hosted by Dr. Jeremy Bettle, PhD — an internationally recognized expert in Human Performance with over 20 years of experience working with elite athletes and high performers — this podcast brings world-class expertise straight to you. Built from elite sport and applied to real life, it breaks down what actually drives resilience, health, performance, and long-term capability. Guest Bio Dr. Keith Baar received his Bachelor's in Kinesiology from the University of Michigan where he also served as an Assistant Strength and Conditioning Coach with the University of Michigan Football team. He then received a Master's degree from the University of California, Berkeley, and his PhD from the University of Illinois where he discovered the first molecular signal that contributes to load-induced muscle hypertrophy. He did his postdoctoral studies on the molecular mechanism underlying the muscular adaptation to endurance exercise under the direction of the legendary Dr. John O. Holloszy at Washington University in St. Louis. Over the last decade, Keith has focused his research efforts on discovering how load and nutrition alter tendon function. This work is changing the way that we load connective tissues to improve performance and accelerate return to play. Keith is currently the head of the Functional Molecular Biology Laboratory (FMBLab) at the University of California Davis. Work from his lab spans from the molecular mechanisms that lead to adaptation to human studies that translate these basic discoveries to interventions that improve performance, longevity, and quality of life. Links * UC Davis Faculty Profile: https://health.ucdavis.edu/physiology/faculty/baar.html * Dr. Baar on LinkedIn: https://www.linkedin.com/in/keith-baar-64914a31/ Three Actionable Takeaways 1. Get the exercise right. That means understanding your genetic predispositions and selecting exercise accordingly. If neurocognitive decline runs in your family, both strength and endurance training are important. If heart disease runs in your family, both types of exercise provide different but necessary stimuli to the heart. The exercise itself is 95 to 98 percent of what drives your adaptation. 2. Concentrate on the things that matter. Whether in training, nutrition, or work, effort spent on low-return activities comes at the expense of high-return ones. Building the foundation correctly means you spend less time and money on things that are unlikely to move the needle. 3. Educate yourself or find people you trust who are genuine experts in what you need. The more you understand how the biology works, the harder it becomes to buy into life hacks that cost a lot and do very little. You do not need a course, just enough exposure to credible, varied sources to build a working filter for what is plausible and what is not. Key Insights * Collagen is not a complete protein. It lacks several essential amino acids and scores zero on protein quality scales. Taking it as a muscle-building supplement instead of a leucine-rich source like whey is counterproductive to your goals. * Dietary collagen does not travel intact to your tendons or skin. The gut breaks it into amino acids. What matters is whether those amino acids, primarily glycine and proline, are available in the right environment when your cells need to make new collagen. * Vitamin C is not optional when supplementing collagen for connective tissue purposes. Without adequate vitamin C, cells cannot secrete the collagen they produce. Scurvy is essentially a failure of collagen export, not collagen production. * Timing collagen intake 30 to 60 minutes before loading exercise is more effective for tendons and ligaments than taking it after, because these tissues rely on fluid flow during movement to deliver nutrients rather than blood flow.

Why Cardiovascular Training Matters for Strength, Recovery & Longevity

The Vitality Collective Podcast is a health and fitness podcast focused on strength, longevity, and real-world performance, bridging the gap between health and performance. Hosted by Dr. Jeremy Bettle, PhD—an internationally recognized expert in Human Performance with over 20 years of experience working with elite athletes and high performers—this podcast brings world-class expertise straight to you. Built from elite sport and applied to real life, it breaks down what actually drives resilience, health, performance, and long-term capability. Designed for high performers, professionals, and anyone who wants to stay strong, capable, and injury-free while balancing real life. This health and wellness podcast explores how to build strength, prevent injury, improve cardiovascular fitness, optimize sleep and nutrition, support cognitive performance and brain health, and maintain emotional and social well-being through expert interviews, applied breakdowns, and proactive, real-world strategies. Whether you're training, recovering from injury, or trying to stay consistent while balancing work, family, and life, this podcast gives you a clear, practical path forward. Guest Bio Dr. Mike Axler is an Assistant Professor of Exercise Science with a PhD in Kinesiology and Applied Physiology. He brings a unique blend of academic expertise and real-world performance experience, having worked as a Division I strength and conditioning coach while also competing in nearly 70 marathons and 20 ultramarathons. Mike is the founder of Axler Concierge Coaching and the host of the Simple Science Podcast, where he breaks down complex topics in exercise, nutrition, and human performance into practical, actionable insights. His research focuses on nutritional epidemiology and applied physiology, with ongoing collaborations spanning wearable technology companies and clinical settings. Driven by both curiosity and personal challenge, he is currently pursuing the goal of running marathons in all 50 U.S. states and on every continent. Links Simple Science Podcast: YouTube [https://www.youtube.com/@mikeaxler7967] Spotify [https://open.spotify.com/show/4aYeDUbL7Tb2ZK6GFm16qg?si=0jnU1R6FTeawcvvQiAgg8Q&nd=1&dlsi=aa07e870af814a64] Instagram: @mikeaxler.phd [https://www.instagram.com/mikeeaxler.phd/] Three Actionable Takeaways 1. Do something physically challenging today that is slightly harder than yesterday. It does not have to be dramatic. If you walked 4,000 steps yesterday, walk 4,050 today. If you ran a six-minute mile, try for 5:59. Progress is the direction, not the distance. 2. Challenge your mind with something new and unfamiliar every day. Ask an AI for a random fact, learn how to say a word in another language, or try a physical skill you have not done before. Neuroplasticity requires novelty and effort. 3. Every time you sit down to eat, put a protein source and a fruit or vegetable on your plate alongside whatever else you are having. You do not have to overhaul your diet. Just anchor every meal to those two things. Key Insights 1. The ATP-PC (phospholytic) system powers the first roughly 10 seconds of any maximal effort. After that, the glycolytic system takes over. The aerobic system becomes dominant when intensity drops to a level the body can sustain -- and it is the only system that runs on stored fat. 2. Aerobic training builds mitochondrial density and capillary density inside muscle fibers. More and healthier mitochondria mean faster ATP regeneration during rest intervals, which translates directly to shorter recovery time between strength sets. 3. Cardiac output equals heart rate multiplied by stroke volume. Consistent zone two training increases left ventricular stroke volume, meaning the heart pumps more blood per beat and does not need to beat as fast. A lower resting heart rate is evidence of this adaptation -- and it compounds over decades. 4. During aerobic exercise, the body draws on both stored glycogen and stored triglycerides (fat). During anaerobic exercise, it burns only carbohydrates.