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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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.

Our Place: The top cookware brand for non-toxic, PFA-free pots and pans. Use the code “AGEIST” for 10% off at fromourplace.com.

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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Berkeley Life: Boost your energy, support heart health, and improve circulation with Berkeley Life Nitric Oxide. Use code AGEIST at berkeleylife.com for 20% off your first purchase—plus 10 free test strips to track your progress.

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.

Maui Nui: The cleanest, most nutrient-dense red meat out there—high in protein, rich in antioxidants, and ethically harvested. Their venison sticks are perfect for healthy snacking on the go and their cuts of meat make for delicious, healthy meals. Right now, Maui Nui is offering a free 12-pack of their jerky sticks with your first order of $79 or more. Just go to mauinuivenison.com/ageist to grab yours.

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.

fatty15: C15:0 is the first essential fatty acid to be discovered in over 90 years, and fatty15 is on a mission to optimize your C15:0 levels to help support your long-term health and wellness—especially as you age. You can get an additional 15% off their 90-day subscription Starter Kit by going to fatty15.com/AGEIST and using the code “AGEIST” at checkout.

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.

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Best-selling author and behavior change expert Karen Salmansohn shares how mortality awareness can be one of the most powerful motivators for living with purpose. She explains her concept of a “near-life experience,” when people go through the motions instead of fully engaging in their lives, and how to break free from it. Karen offers practical tools—like writing your aspirational eulogy and linking core values to habits—that help listeners live with urgency and authenticity. Her upcoming book, Your To-Die-For Life, blends humor, science, and philosophy to guide readers toward more meaningful, regret-free living.

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

Special Thanks to Our Sponsors
fatty15: C15:0 is the first essential fatty acid to be discovered in over 90 years, and fatty15 is on a mission to optimize your C15:0 levels to help support your long-term health and wellness—especially as you age. You can get an additional 15% off their 90-day subscription Starter Kit by going to fatty15.com/AGEIST and using the code “AGEIST” at checkout.

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.

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.

Key Moments

“Instead of being afraid of taking a risk, you get afraid of dying with the music still inside you.”

“Identity is destiny. Who you think you are affects what you do.”

“Numbers make things more alarming and thereby create the urgency that creates action.”

Connect with Karen Salmansohn

Website

Book: Your To-Die-For Life

Instagram (@notsalmon)

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LinkedIn

Click Here for the full interview transcript.

Say hi to the AGEIST team!

At Maui Nui, Jake Muise isn’t just producing venison–he’s redefining what sustainable, nutrient-dense food looks like. In this episode, Jake unpacks the ecological damage caused by invasive axis deer in Hawaii and how his company uses USDA-certified night harvesting to turn a problem into a protein solution. He explains the connection between deer diet, volcanic soil, and unmatched nutrient density, and how this wild-harvested meat supports both local communities and long-term environmental health. Listeners will come away with a clearer understanding of what “real” protein means–and why it could add a decade of quality movement to your life.

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

Special Thanks to Our Sponsors

Maui Nui: The cleanest, most nutrient-dense red meat out there–high in protein, rich in antioxidants, and ethically harvested. Their venison sticks are perfect for healthy snacking on the go and their cuts of meat make for delicious, healthy meals. Right now, Maui Nui is offering a free 12-pack of their jerky sticks with your first order of $79 or more. Just go to mauinuivenison.com/ageist to grab yours.

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.

Key Moments
“The nutritional composition of an animal absolutely changes with how its life ends.”

“You have the world’s best soils, extraordinary plant diversity, and highly intelligent wild grazers.”

“We’re probably going to be one of the only businesses trying to get smaller in the future by solving a problem.”

Connect with Jake Muise
Website: https://mauinuivenison.com
Instagram: https://www.instagram.com/mauinuivenison

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Click Here for the full interview transcript.

Say hi to the AGEIST team!

Olympian and innovation expert John Coyle joins us to reframe our understanding of time, memory, and the pursuit of meaningful experiences. Through the lens of neuroscience and Greek philosophy, he explains how our brains don’t count minutes–they count moments. He offers a practical roadmap to “time expansion,” showing how strategically designed risks and emotionally charged experiences can help us feel like we're living longer, more vibrant lives. For anyone feeling like time is slipping away, this episode offers a blueprint to reverse that sensation and start crafting a life full of memorable chapters.

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

Special Thanks to Our Sponsors

Maui Nui: The cleanest, most nutrient-dense red meat out there—high in protein, rich in antioxidants, and ethically harvested. Their venison sticks are perfect for healthy snacking on the go and their cuts of meat make for delicious, healthy meals. Right now, Maui Nui is offering a free 12-pack of their jerky sticks with your first order of $79 or more. Just go to mauinuivenison.com/ageist to grab yours.

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.

fatty15: C15:0 is the first essential fatty acid to be discovered in over 90 years, and fatty15 is on a mission to optimize your C15:0 levels to help support your long-term health and wellness–especially as you age. You can get an additional 15% off their 90-day subscription Starter Kit by going to fatty15.com/AGEIST and using the code “AGEIST” at checkout.

Key Moments

“The more of them you have, the more recallable they are, the longer you live. Simple as that.”

“You are the sum of your memories.”

“Time and money are fungible. You're trading your time for money your whole life. It's time to trade your money for time.”

Connect with John Coyle
Website: https://johnkcoyle.com

Book: Design for Strengths: Applying Design Thinking to Individual and Team Strengths – https://www.amazon.com/Design-Strengths-Applying-Individual-Strengths/dp/0999236702/

Time Capital Investment Guide

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Say hi to the AGEIST team!

Can targeted peptides enhance your energy, immune response, and even appearance as you age? Dr. Chris Renna, a pioneer in longevity medicine, shares decades of clinical insights and why peptides are rapidly shifting from fringe to foundational. This conversation covers everything from GLP-1 drugs to collagen-stimulating skincare and the crucial role belief plays in health outcomes. For anyone interested in practical, science-backed tools to stay strong, sharp, and resilient over time–this one’s essential.

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

Special Thanks to Our Sponsors

Troscriptions: Precise, pharmaceutical-grade nootropics for peak performance. Whether you need laser focus, mental clarity, or a boost in cognitive endurance, Troscriptions delivers science-backed results. Use the code “AGEIST” for 10% off or click here.

fatty15: C15:0 is the first essential fatty acid to be discovered in over 90 years, and fatty15 is on a mission to optimize your C15:0 levels to help support your long-term health and wellness–especially as you age. You can get an additional 15% off their 90-day subscription Starter Kit by going to fatty15.com/AGEIST and using the code “AGEIST” at checkout.

Maui Nui: The cleanest, most nutrient-dense red meat out there–high in protein, rich in antioxidants, and ethically harvested. Their venison sticks are perfect for healthy snacking on the go and their cuts of meat make for delicious, healthy meals. Right now, Maui Nui is offering a free 12-pack of their jerky sticks with your first order of $79 or more. Just go to mauinuivenison.com/ageist to grab yours.

Key Moments
"Each of you contain the same complexity as a universe."

"Hormones work like music–they're rhythmic, they're symphonic."

"The first 'N' we should care about is the N of one."

Connect with Dr. Renna

Website: Lifespan Medicine

Dr. Renna’s First Appearance on The AGEIST Podcast

Email: info@lifespanmedicine.com

Connect with AGEIST

Newsletter

Instagram

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

Say hi to the AGEIST team!

On this week's episode of The AGEIST Podcast, Stacy London shares her candid, inspiring take on midlife, aging, and why movement–both physical and emotional–is key to thriving. She explains how physical strength transformed her mindset and gave her the courage to embrace risk, explore curiosity, and reclaim joy. Stacy opens up about menopause, people-pleasing, and the emotional recalibration that happens when we stop shrinking ourselves to fit outdated expectations. Tune in to walk away with a fresh understanding of how style, strength, and purpose intersect in the second half of life.

How long will you live? Take our quiz today to find out!

Special Thanks to Our Sponsors

David Protein: Fuel your body's potential with David Protein, the premium formula that delivers complete amino acid profiles without compromise. Experience the difference that sustainable, clean nutrition makes in your recovery and performance–because your body deserves nothing less than extraordinary. Use our link, and when you buy 4 boxes, you get the 5th box free. Visit: tinyurl.com/weareageist.

Timeline Nutrition: One of our favorite supplements 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 at our link here. Find your favorite LMNT flavor, or share with a friend.

Key Moments

"The stronger I get, the more I feel like that rock."

"If you want things in your life to change, you're the one who has to change first."

"I don't want people to say, 'You look beautiful.' I want them to say, 'You look capable. You look confident. You look fearless. You look strong.'"

Connect with Stacy
Wear Whatever The F You Want

Instagram: @stacylondonreal

Substack: stacylondon.substack.com

Book: The Truth About Style

Connect with AGEIST

Newsletter

Instagram

Website

LinkedIn

Tune in to hear more from Stacy London on this episode of The AGEIST Podcast or check out thefull interview transcript.

Say hi to the AGEIST team!