TheFit FirstPodcast

In this episode of Fit First, I’m joined by Jim LaValle, Chief Science Officer at Life Time MIORA, Chair of the International Peptide Society, and Clinical Co-Chair of the A4M Advisory Board. With decades of experience spanning clinical pharmacy, metabolic health, personalized care, human performance, and integrative medicine, Jim brings a unique perspective on how we can move toward more precise and effective approaches to health. We explore drug-induced nutrient depletions and why their effects can be overlooked in conventional healthcare, the importance of comprehensive diagnostics and blood work, and how better clinical reasoning can help connect the dots between symptoms, physiology, and underlying health. We also discuss metabolic health, personalized medicine, emerging peptide therapeutics and where these tools may fit when appropriately indicated. Throughout the conversation, Jim emphasizes an important principle that can get lost amid new technologies and interventions: no advanced therapy can replace the fundamentals of managing our biology through better behaviors and sustainable choices. We also discuss healthcare innovation and the importance of adding better tools and greater precision to existing systems rather than simply replacing what already works. Jim’s ability to bridge clinical experience, scientific research, education, and emerging health technologies makes for a fascinating conversation about where healthcare is today and where it may be heading next.

What if movement is not simply something we train, but a language through which we express human potential? In this episode of Fit First, Blake Koehn sits down with David Weck, entrepreneur, inventor, movement innovator, and author of Every Step Stronger, for a wide-ranging conversation about the way we understand and interact with the human body. David has spent decades challenging conventional ideas about movement, exploring the incredible diversity of ways the human body can move, adapt, and express itself. Together, Blake and David explore the intersection of anatomy, movement, athletic expression, human potential, creativity, and innovation, while discussing why our approach to physical training may benefit from thinking beyond traditional exercise paradigms. The conversation also extends beyond movement itself into David’s entrepreneurial journey, the process of turning unconventional ideas into real-world innovations, and what it means to remain curious enough to question assumptions that others take for granted. This is a conversation about movement, but also about how we think. What happens when we stop asking, “What is the correct way to move?” and start asking, “What is possible?

What actually drives adaptation in high-level athletes? In this episode of Fit First, I sit down with legendary strength and conditioning coach Cal Dietz, one of the most influential performance coaches of the modern era. Cal has spent decades coaching at the highest levels of sport, including work with the University of Minnesota, USA Hockey, Olympic athletes, and national championship programs. His work has fundamentally influenced how coaches approach strength, power, athletic development, and performance. We go deep on the foundational principles behind the Triphasic Method, including why the timing, exposure, and sequencing of training stimuli matter when trying to create specific adaptations. As Cal explains, knowing when and how to apply a stimulus can be just as important as the stimulus itself. Beyond Triphasic, we explore Cal’s broader coaching philosophy, activation strategies, programming principles, injury resilience, movement quality, and how emerging performance technologies can be integrated into modern training systems. Cal has a unique ability to translate complex physiology into practical, repeatable coaching systems. His methods have influenced thousands of coaches and contributed to the development of Olympic athletes, national champions, professional competitors, and elite performance programs around the world. Whether you're a strength coach, clinician, therapist, performance professional, or serious athlete, this conversation offers practical insight into programming, adaptation, and the principles that underpin long-term athletic performance.

In this episode, I sit down with entrepreneur, bestselling author, athlete, and world-renowned health educator Mark Sisson to explore the principles, strategies, and mindset behind sustained health, performance, and healthy aging. We discuss metabolic flexibility and how a practical, applied approach to nutrition can support metabolic health, physical performance, and long-term healthspan. Rather than chasing the latest trend, Mark shares his perspective on the foundational principles that continue to matter most. In the full conversation, we go deeper into exercise selection, the potential pitfalls of the modern biohacking movement, and how the pursuit of optimization can sometimes distract from the fundamentals of health and longevity. We also explore Mark’s remarkable entrepreneurial journey—from building the Primal brand and Primal Kitchen to ultimately selling the company to Kraft Heinz—and the lessons that journey offers about health, business, and building something with lasting impact. Mark has spent decades practicing what he preaches. As an athlete, author, health educator, and entrepreneur, he has continually applied the principles of health, performance, and longevity to his own life while helping shape the modern health and wellness landscape. His combination of firsthand experience, scientific curiosity, and entrepreneurial execution has made him one of the most influential voices in health and wellness—and made this a conversation I was particularly excited to have.

In this episode, I sit down with Dr. Rachel Pojednic, Director of Education at Stanford Lifestyle Medicine, whose work sits at the intersection of nutrition, exercise science, and healthy aging. We explore what the future of healthcare should look like—and why meaningful progress may depend on breaking down the traditional silos between scientific research, clinical medicine, and the wellness industry. Each field brings unique strengths, but lasting impact comes from integrating scientific rigor, clinical expertise, and personalized lifestyle interventions into a more unified approach to health. We discuss how integrated health ecosystems can incorporate personal health data, how to distinguish evidence-based strategies from overhyped wellness trends, and why nuance, scientific literacy, and critical thinking are essential for advancing health, performance, and longevity. The future of healthcare isn’t about choosing between research, medicine, or wellness. It’s about integrating the strengths of each to create a more personalized, evidence-based approach to improving health outcomes.

In this episode, I sit down with Dr. Andrew Koutnik, a research scientist whose work spans Type 1 diabetes, metabolic health, and human performance, to explore how cutting-edge science can be translated into practical strategies for improving health, preventing disease, and optimizing performance. We discuss the growing role of Continuous Glucose Monitors (CGMs) in personalized health and how real-time data can provide insight into individual responses to food, movement, and lifestyle behaviors. But as Dr. Koutnik emphasizes, data alone doesn’t improve health outcomes. The real value comes from using that information to create awareness, change behavior, and build sustainable habits. In the full conversation, we dive into the history and rising prevalence of diabetes, the impact of sedentary living on metabolic health, and how today’s food environment and broader cultural factors contribute to obesity and chronic disease. We also explore emerging research, practical strategies for improving metabolic health, and how individuals can use technology and behavioral change to take greater ownership of their health. Ultimately, optimizing health isn’t about finding the perfect metric, device, or intervention. It’s about building awareness, making better decisions, and creating behaviors that compound over time.