The Discover Strength Podcast

How does the body respond when we increase physical activity while trying to lose weight? In this episode of the Discover Strength Podcast, Luke Carlson is joined by Dr. Eric Trexler of Duke University to discuss one of the most important and provocative areas of exercise science: constrained total energy expenditure. Dr. Trexler explains the difference between the traditional “additive” model of energy expenditure and the constrained model, which suggests that the body can compensate for increases in physical activity by reducing energy expenditure elsewhere. The conversation explores what this compensation can look like—from changes in subconscious movement and resting metabolism to changes that occur during sleep—and why the effect may be particularly pronounced when exercise is combined with caloric restriction. Luke and Dr. Trexler also discuss what this research means for cardio, weight loss, physique athletes, and resistance training. Perhaps most importantly, they examine how we should think about the purpose of exercise when weight loss is not the best measure of its value. This episode offers a fascinating look at the complex ways the human body regulates energy—and why better expectations about exercise may ultimately help us stay active for the long term. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

What is it really like to own and operate a Discover Strength studio? In this episode, Discover Strength CEO Luke Carlson is joined by two Discover Strength franchise owners at very different points in their journeys: Jim, who opened his first studio in Flemington, New Jersey, just six months ago, and Maddie, who started as a Discover Strength intern in 2014 and now owns multiple studios in Minnesota and Wisconsin. Together, they provide a behind-the-scenes look at franchise ownership—from choosing a location and building a team to generating referrals, delivering exceptional customer service, and learning how to lead and manage a growing business. Maddie shares what she has learned while scaling from one studio to multiple locations, while Jim offers an honest perspective on the challenges of launching Discover Strength in a brand-new market. Luke, Maddie, and Jim also discuss Discover Strength’s three obsessions: the workout, customer service, and leadership and management; the role of corporate support; what has been harder than expected; the most rewarding aspects of ownership; and what makes someone a great—or not-so-great—franchise owner. The conversation offers an inside look at what it takes to build a Discover Strength business while staying obsessed with the things that matter most. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

What does it mean to lose weight well? In this episode of the Discover Strength Podcast, CEO and exercise physiologist Luke Carlson breaks down a brand-new 52-page research paper examining how we should approach weight loss in the GLP-1 era. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

In this episode of the Discover Strength Podcast, Luke Carlson explores the power of an essentialist approach to exercise: focusing on the few things that actually drive the majority of results. Rather than getting distracted by optimization, new trends, and minor details, what should we really be prioritizing? Luke breaks down the fundamentals of an effective, sustainable exercise program, including high-intensity resistance training, progressive overload, adequate recovery, and intelligent cardiovascular exercise. He also discusses why sustainability and safety matter more than chasing the “perfect” workout, and why the best program is ultimately the one you can continue doing for years to come. The message is simple: don’t major in minor things. Focus on what matters most, and let the rest take a back seat. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

What does it take to stay active, engaged, and optimistic at 96 years old? On this episode of the Discover Strength Podcast, CEO and exercise physiologist Luke Carlson sits down with Ben Jaffray—a 10-year Discover Strength client, Air Force veteran, former Cargill executive, philanthropist, and lifelong learner—to discuss a remarkable life spanning nearly a century. Ben shares the lessons he's learned from military service, leadership, business, and aging with purpose. He explains why it's never too late to contribute, why fulfillment matters more than wealth, and how strength training has given him the vitality and confidence to continue living life on his terms. Whether you're 30, 60, or 90, this conversation is filled with timeless wisdom about resilience, relationships, leadership, and the power of investing in your health. In this episode: Why it's never too late to start strength training Leadership lessons from the military and business How to build a meaningful career—and an even more meaningful life The connection between strength, confidence, and independence What healthy aging really looks like at 96 Why purpose—not retirement—is the key to longevity This episode is a reminder that strength isn't just about muscles—it's about living a life of purpose for as long as possible. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

In this episode of the Discover Strength Podcast, Luke Carlson examines a recent systematic review and meta-analysis exploring one of the most overlooked variables in resistance training: repetition speed. Most people lift weights at whatever pace feels natural. But what happens when you intentionally control the tempo of every repetition? Luke breaks down the latest research on tempo-controlled resistance training and explains how slowing down your repetitions may improve communication between your brain and muscles, enhance neuromuscular function, and produce greater strength gains than self-paced lifting. Along the way, he explores why repetition speed has been largely ignored in traditional fitness settings—and why it has been a cornerstone of the Discover Strength approach for years. If you've ever wondered whether the speed of your repetitions really matters, this episode offers an evidence-based answer. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

Does body weight matter more than fitness when it comes to living a longer, healthier life? In this episode, Luke Carlson explores a brand-new meta-analysis published in the British Journal of Sports Medicine examining the relationship between body mass index (BMI), cardiorespiratory fitness, and mortality. The findings reinforce decades of research behind the "Fit-Fat Paradox": individuals who are physically fit—even if they are overweight—often have a lower risk of premature death than individuals who are lean but unfit. Luke breaks down what this research means for exercisers, explains why fitness and body weight are not the same thing, and discusses why improving your VO₂ max and muscle strength should be prioritized over simply chasing a lower number on the scale. He also examines why exercise is remarkably effective at improving fitness but relatively ineffective for weight loss—and why that's actually good news. If your goal is longevity, this episode offers an evidence-based perspective that may completely change how you think about health, fitness, and body composition. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

What makes a business more than just four walls? In this thought-provoking episode, Discover Strength CEO and exercise physiologist Luke Carlson explores the idea of a "church with no religion"—an analogy he has used for decades to describe organizations that have facilities, products, and services but lack a clear philosophy or way of doing things. Luke discusses why Discover Strength was built around principles rather than equipment, and why a company's beliefs should outlive its physical location. He shares the foundational ideas that guide Discover Strength, including evidence-based resistance training, the professionalization of exercise physiologists, an unwavering commitment to safety, servant leadership, and the pursuit of continuous improvement. Whether you're a fitness enthusiast, business leader, entrepreneur, or someone interested in building a values-driven organization, this episode offers a compelling perspective on what it means to create something that stands for more than the services it provides. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

How much strength training do you really need if you also enjoy running, cycling, pickleball, yoga, Pilates, hiking, or recreational sports? In this episode, Discover Strength CEO and exercise physiologist Luke Carlson explores the science and practicality of combining strength training with the other activities you love. He discusses the often-misunderstood "interference effect," explains why strength training remains the foundation of long-term health and fitness, and outlines three common approaches to balancing exercise, recreation, and performance goals. Busy people do not have time to waste on exercise that doesn't work. Tune in to learn how to make strength training fit alongside everything else you love to do. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

This week on the Discover Strength Podcast, Luke Carlson reflects on 20 of the most important business lessons he has learned over two decades of building Discover Strength. To celebrate the company’s 20th anniversary, Luke steps away from exercise science and instead shares the principles that have shaped Discover Strength’s culture, leadership philosophy, and long-term growth strategy. Throughout the episode, Luke breaks down practical lessons on hiring exceptional people, building a values-driven culture, creating clarity around mission and standards, focusing relentlessly on customer experience, and maintaining long-term thinking in business. Drawing inspiration from influential thinkers like Jim Collins, Luke explains how concepts such as “First Who, Then What” became foundational to the success of Discover Strength. Rather than offering trendy business hacks or fitness-industry-specific tactics, the conversation focuses on timeless principles applicable to leaders and organizations in any field. The episode is both a reflection on the journey of Discover Strength and a practical leadership guide for entrepreneurs, managers, and anyone interested in building a high-performing organization with purpose and staying power. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

On this episode of the Discover Strength Podcast, Luke Carlson shares key takeaways from the 2026 Discover Strength Summit, featuring exercise scientist Dr. Lauren Colenso-Semple. Together, they unpack the evidence-based realities surrounding menopause, metabolism, muscle loss, and resistance training for women. Luke explores why so many women have been misled about exercise, how fear-based fitness messaging has created confusion, and what the latest research actually says about strength training during midlife and beyond. From debunking myths about metabolism slowing during menopause to discussing why exercise should not be viewed solely as a tool for weight loss, this episode delivers practical, science-backed insights every woman should hear. If you want a clearer understanding of how to train smarter, avoid misinformation, and focus on what truly matters for long-term health and strength, this episode is for you. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

What separates meaningful research from misleading results? In this episode, we sit down with Dr. James Steele to break down the most important—but often overlooked—aspect of exercise science: methodology. As part of our latest Project Discover study, we go beyond the headlines and dig into how research is actually conducted, why study design matters, and what it takes to produce results you can trust. Because in strength training, it’s not just what a study finds—it’s how it finds it. If you’ve ever wondered why studies seem to contradict each other, or how to separate high-quality evidence from noise, this episode will change the way you think about fitness research—and how you apply it to your workouts. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

Should you combine strength training and cardio—or does one compromise the other? In this episode, we explore the concept of concurrent training and the long-debated “interference effect”—the idea that adding cardio to a strength program may blunt gains in muscle size and strength. For decades, researchers and practitioners have debated whether you can truly optimize both at the same time. We break down a brand-new study investigating strength training alone versus concurrent training, and what the latest evidence tells us about hypertrophy, performance, and overall health outcomes. Does cardio actually interfere with your results, or is the concern overstated? As always, we cut through the noise and focus on what matters most: how to apply the science in a way that helps you train more effectively—and get better results. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

Eccentric exercise might be the most important and most overlooked component of resistance training. In this episode, Luke Carlson breaks down the science behind eccentric contractions—the lowering phase of a lift—and explains why this often-neglected portion of an exercise may deliver the greatest return on your investment in the gym. You’ll learn: The fundamental differences between concentric, isometric, and eccentric muscle contractions Why eccentric training produces superior strength and hypertrophy adaptations How eccentric loading impacts muscle physiology and long-term health outcomes Practical ways to incorporate eccentric-focused training into your workouts If your goal is to train smarter, not just harder, this episode will challenge how you think about every repetition you perform. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

In this episode, we break down key insights from one of the largest gatherings in the fitness industry, where thousands of operators, leaders, and innovators came together to discuss the future of health and strength training. We explore what’s actually changing—AI, operations, and scaling businesses—and what isn’t: the enduring importance of human connection, high-quality coaching, and evidence-based training. If you’re interested in where the fitness industry is headed (and where Discover Strength fits into that future), this conversation highlights the trends that matter—and the noise that doesn’t. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

In this episode of the Discover Strength Podcast, CEO and exercise physiologist Luke Carlson breaks down new research on resistance training and fat loss. He reviews a recent study published in Frontiers in Endocrinology and connects it to over a decade of evidence on how strength training influences body composition. Luke explains why the goal of weight loss should be fat loss—not just a lower number on the scale—and how resistance training helps preserve or increase lean muscle while maximizing fat reduction. He also explores the critical role of abdominal fat in cardiometabolic risk and what the latest findings reveal about reducing central obesity. If you want to understand the science behind “high-quality weight loss” and why lifting weights is essential for long-term health and weight maintenance, this episode delivers the key takeaways. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

In this episode of the Discover Strength Podcast, CEO and exercise physiologist Luke Carlson shares six underrated business books that have had a meaningful influence on him. Drawing on lessons from mentors, personal reading habits, and years of leadership experience, Luke explains why these books have been so impactful. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

In this episode of the Discover Strength Podcast, Luke Carlson sits down with Rick Rignell to reflect on the life and legacy of Kim Wood, one of the most influential figures in the history of strength training. Kim Wood was the NFL’s first full-time strength and conditioning coach, serving the Cincinnati Bengals for nearly three decades and helping shape how professional athletes train to this day. Long before strength training was widely accepted in professional sports, Kim was pioneering methods focused on strength training, discipline, and long-term athlete development. Luke and Rick share personal stories and firsthand experiences with Kim, discussing his mentorship, his larger-than-life presence in the weight room, and the profound impact he had on their careers and perspectives on training. The conversation highlights not only Kim’s contributions to professional football, but also the values he instilled—work ethic, humility, and respect for the process. This episode serves as a tribute to a true pioneer whose influence continues to be felt throughout the strength training industry. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

As Luke prepares for an upcoming marathon, he shares what this endurance-focused training is teaching him about strength, fatigue, and exercise adaptation. In this episode, we explore how marathon training impacts muscle, why endurance and strength produce very different outcomes, and how Luke is balancing high-mileage running while maintaining strength. A practical look at training tradeoffs—and what they mean for anyone trying to get fitter, stronger, and healthier. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !

In this episode, Luke Carlson reflects on what he believes was an exceptional year for exercise science research. He breaks down 5 excellent research papers and important conclusions that can be drawn from them. If you care about evidence-based training, intelligent decision-making, and separating signal from noise in the fitness industry, this conversation will sharpen your perspective. Discover Strength offers free Introductory Workouts at any location across the United States. You can schedule your free Introductory Workout HERE !