The CrossFit Podcast

Dr. Rhonda Patrick on High-Intensity Exercise and Health (EP.017)


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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 — and 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 
      • Community Highlight

        Kenny Kane has been coaching since 2005 and took over CrossFit Oak Park in 2015.When the Los Angeles wildfires hit, nearly a third of the gym’s members were displaced — and 20 lost their homes.

        In the middle of it all, priorities shifted. First: safety. Then, helping people meet basic needs. Running classes came second.What stood out most to Kenny wasn’t the hardship — it was the response. The Oak Park community came together fast. Members organized donations, raised money, and supported one another in every way possible.

        For years, Kenny poured everything into building that community. In return, they showed up tenfold.CrossFit Oak Park has always focused on helping people live well outside the gym. In a moment of crisis, that philosophy held strong.This is what the CrossFit community looks like.

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