Metabolic flexibility may be one of the most overlooked markers of long term health. Your body should be able to shift between burning carbohydrates and fat depending on the demand. But many people lose that ability over time. In this episode, I sit down with Dr. Martin Gibala to discuss the science of Fat Max, why mitochondrial quality matters for both performance and longevity, and how sprint interval training can stimulate mitochondrial adaptations comparable to traditional endurance training in far less time. Sometimes the question isn’t how long you train. It’s how intensely you’re willing to push. Listen to the full conversation.