How Obesity Changes Muscle Metabolism—and How to Protect Muscle During Fat Loss with Dr. Paul Morgan

What happens inside skeletal muscle during obesity—and how can we protect lean mass while losing fat? The PSMF Library is officially live 🎉 👉 Check it out here + get 20% off with code VANESSA In this episode, Vanessa speaks with Dr. Paul Morgan about the hidden effects of obesity on muscle metabolism, including anabolic resistance, fat infiltration, inflammation, and changes in muscle protein turnover. Try my favorite new electrolytes Cure Hydration 💙 Now available at Target 🎯 If you'd like to try Cure for yourself, head to curehydration.com/VANESSA and use code VANESSA to save 20% on your order. They explore the paradox that carrying more body mass can increase the loading stimulus on muscle, while obesity may simultaneously reduce the muscle-building response to protein and exercise. Dr. Morgan also explains why preserving lean mass is so important during weight loss, including during aggressive calorie restriction and GLP-1 use, and how resistance training, adequate protein, and regular activity can help improve the quality of weight loss. They also discuss protein needs with aging, per-meal protein targets, mTOR, autophagy, and why animal research should not always be translated directly into human nutrition advice. In this episode, you'll learn What anabolic resistance is and why it matters How obesity may affect muscle protein synthesis and breakdown Why fat infiltration and inflammation can reduce muscle quality How to better preserve muscle during fat loss How GLP-1 use may affect lean mass Why protein needs may increase with age and calorie restriction The difference between temporary and chronic mTOR activation Why animal findings do not always translate directly to humans Dr. Paul Morgan is a Research Fellow in the School of Sport, Exercise and Rehabilitation Sciences at the University of Birmingham, UK. His research focuses on skeletal muscle metabolism, obesity, aging, anabolic resistance, and the effects of nutrition and exercise on muscle health and function. The PSMF Library is officially live 🎉 This is the exact structured, high-protein approach Vanessa used for fat loss and body recomposition — without restricting calories every single day. Instead of guessing what to eat or starting over each week, you'll follow a clear, repeatable system combining high-protein, lower-energy days with maintenance days. ✨ What's Included 📘 Premium printed PSMF Library ⚡ Instant digital access 🥩 High-protein, low-carb recipe library 🧠 Tiered system (PSMF + maintenance days) 🛒 Grocery lists + planning tools 👥 3 months of community support 👉 Check it out here + get 20% off with code VANESSA 🔴 Tone Lux Red Light Therapy Boost collagen, elastin, and recovery ✨ Save 20% with code VANESSA Discover: Tone Lux Crystal Face Mask Tone Lux Contour (neck & décolletage) 🔬 Tone Device Vanessa uses the Tone Device as a proxy for fat loss + autophagy on PSMF days Check it out HERE 👉 Use code VANESSA for 20% off Follow @optimalproteinpodcast on Instagram to see visuals and posts mentioned on this podcast. Link to join the Facebook group for the podcast The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet or exercise regimen.