[Most Played] Dr. Rhonda Patrick Shares The Science Behind Longevity

From now until the end of the 2026 CrossFit Open, presented by Air National Guard, we’re resharing the episodes you all loved the most. Catch a most-played episode every two weeks, right here in your podcast feed.  Good luck in the Open, and we’ll see you on the leaderboard. Dr. Rhonda Patrick is a leading researcher in nutrition, aging, and metabolic health. She’s known for translating complex science into practical tools for longevity and performance. Now, after a year of doing CrossFit, she has new insights to share. In this episode, Rhonda joins Denise to break down the cellular mechanisms behind high-intensity exercise, why lactate is more than a waste product, and how CrossFit helps train your brain, not just your body. They cover topics like VO2 max, mitochondrial repair, post-meal inflammation, aging muscles, and the science behind “exercise snacks.” Rhonda also shares her personal transformation from intimidated beginner to committed athlete and why she believes CrossFit may be one of the most powerful tools for lifelong health. Topics Included Why Rhonda started CrossFit — and how her perspective shifted after a year of training What lactate actually is and why it’s a powerful signal for brain and muscle health How high-intensity exercise triggers mitochondrial repair and neurogenesis The relationship between sedentary behavior, inflammation, and cancer risk The research behind exercise “snacks” and how to use them throughout your day The benefits of CrossFit for aging adults, and Rhonda’s vision for senior fitness Resources Mentioned Dr. Patrick’s website and podcast “Found My Fitness” Dr. Martin Gibala podcast episode Rhonda at the CrossFit for Health Summit