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The CrossFit Podcast

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

The CrossFit Podcast

CrossFit LLC

Health & Fitness

4.3 • 757 Ratings

🗓️ 2 March 2026

⏱️ 63 minutes

🔗️ Recording | iTunes | RSS

🧾️ Download transcript

Summary

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

Transcript

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0:00.0

You're not challenging your lungs and your heart and your muscles and your brain daily,

0:05.0

then you're really not living life.

0:07.0

Exercise does forgive a lot of sins.

0:09.0

I'm very focused on brain health.

0:11.0

And I know that lactate is essential in that equation.

0:14.0

And to get the lactate, you have to go hard.

0:16.0

It's never too late to start a structured physical activity program like CrossFit. When I first started

0:22.1

doing CrossFit, I didn't think I was going to be able to, you know, deadlift 140 pounds

0:28.9

for two reps. We've got Dr. Rhonda Patrick here and you're a powerhouse in the fitness industry and it's,

0:41.3

it really is a pleasure to have you on because every fitness expert from your Hubermans to your rich roles to your, even not necessarily experts,

0:52.3

but people who have a lot of pull on the internet, like

0:55.4

your Tim Ferriss says, I mean, you've been all over the internet.

0:59.0

And it just means a lot that you are going to take this time with us because we want

1:03.8

to advance human performance.

1:06.2

We want to push health and fitness the right way.

1:09.9

And this is where you've spent, I think, the majority of your

1:12.9

career as a researcher, specifically in nutrition and aging and disease prevention. And that's

1:20.0

right up our alley. So we just wanted to say, thank you for coming on and want to get into the

1:25.1

science of why CrossFit works, because we know it works,

1:28.8

but we can't always explain it from a physiological level.

1:32.2

And so I'm going to be asking you a lot of questions about, hey, when I'm doing this,

1:36.0

what's happening in the body?

...

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