Brian MacKenzie has trained some of the world’s top athletes, but today his focus is on something far more universal: how we breathe and regulate stress. In this episode of The AGEIST Podcast, he breaks down why breath control is the most underutilized tool for improving health, sleep, and performance at any age. He explains how the nervous system can be trained just like a muscle, offering practical tools to build resilience and adaptability in daily life. Tune in to walk away with new strategies for reducing stress, sleeping better, and aging stronger through intentional breathing and recovery practices.

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3 Key Quotes

“The nervous system is trainable, and most people don’t even realize they can influence it.”

“If you can’t breathe well, you can’t move well, and you certainly can’t recover well.”

“Stress isn’t the problem—our inability to regulate it is.”

Connect with Brian MacKenzie

Website

Instagram (@brianmackenzie)

Books: Unplugged: Evolve from Technology to Upgrade Your Fitness, Performance & Consciousness and Power Speed Endurance

Tune in to hear more from Brian MacKenzie on this episode of The AGEIST Podcast or check out the full interview transcript.

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What if the aches and pains of aging weren’t inevitable but simply a sign of movement malnourishment? Katy Bowman, biomechanist and author of several books, including Move Your DNA, returns to challenge everything you thought you knew about exercise and health. She introduces the idea of a “movement diet”—a diverse mix of postures and motions your body needs daily for optimal function—and breaks down how to rethink movement beyond the gym. Plus, she explains why sitting on the floor could be more beneficial than a workout and how every activity in your day, from chores to rest, can become an opportunity to move better.

How long will you live? Take our quiz today to find out at ageist.com/longevity-quiz!

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Key Moments

“That ship [of movement] is leaving 10,000 times a day. Just get on that ferry.”

“Your favorite mode of exercise, unfortunately, doesn't really make a well-balanced movement diet.”

“You're much more malleable than you probably believe right now.”

Connect with Katy Bowman

Website (Nutritious Movement)

Instagram (@nutritiousmovement)

Books: Move Your DNA, Dynamic Aging,

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Can you heal your cardiovascular system with food? Dr. William Li returns to explain how inflammation, oxidative stress, and poor lifestyle habits damage your blood vessels–and what you can do to reverse it. From fruit peels to dark chocolate, he outlines specific nutrients that signal stem cells to “re-pave” your vascular highways. You’ll also learn the simple daily practices he recommends to keep your brain sharp, heart strong, and energy high well into your later decades.

How long will you live? Take our quiz today to find out at ageist.com/longevity-quiz!

Special Thanks to Our Sponsors
Timeline Nutrition: Our favorite supplement for cell support and mitochondrial function. Listeners can now get 20% off their first Timeline purchase by using the code “AGEIST” at checkout at TimelineNutrition.com/ageist.

LMNT Electrolytes: Our #1 electrolytes for optimal hydration. Get a free 8-count Sample Pack of LMNT’s most popular drink mix flavors with any purchase by using our link here. Find your favorite LMNT flavor, or share with a friend.

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Key Moments

“If your blood vessels are not healthy, you don’t stand a chance of actually living a long time.”

“We can Zamboni our own blood vessels to get back to health if they’ve been damaged.”

“The darker the chocolate, the more cacao… and the higher the levels of the polyphenol that calls out stem cells.”

Connect with Dr. Li

Website: drwilliamli.com

Course: Elevate Your Metabolism

Books

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Click Here for the full interview transcript.

Say hi to the AGEIST team!