We're revisiting a fan favorite this week: our September 2024 conversation with Dr. Stacy Sims, the exercise physiologist behind one of the most useful ideas in women's fitness: women are not small men, and their training shouldn't be built as if they were. We're getting excited because Dr. Sims is preparing to join us at the Super Age Games this November, and can’t wait to celebrate women in sports, science, and longevity alongside her. In this episode, Dr. Sims breaks down why women over 40 need to emphasize heavy lifting and high-intensity intervals, and why perimenopause is the pivot point that changes almost everything about how a woman's body responds to exercise.

Join Us at the 2026 Super Age Games! Visit games.superage.com to learn more.

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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: Try the all-new Lemonade Iced Tea! Our #1 electrolyte mix 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

"Women don't age in a linear fashion like men do. Hormonal changes hit much earlier and more dramatically."

"For women over 40, lifting heavy isn't optional—it's essential for maintaining lean mass and bone density."

"Women are already metabolically flexible. High-intensity is where the real gains are."

Connect with Dr. Stacy Sims

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Stacy’s book: Roar

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After twenty five years as a traditional orthopedic surgeon, Dr. Elizabeth Yurth walked away from a specialty she says patches the body instead of heals it. This was a shift that eventually led her to found the Boulder Longevity Institute. In this conversation, she explains why a common knee surgery called arthroscopic debridement has been abandoned in most countries, and why cheap, decades-old lab values like creatinine and ALT are routinely misread by doctors who are misinformed on these measures. She also makes the case for treating peptides the same way we treat hormones: as naturally occurring compounds the body simply stops producing with age, not a bodybuilding shortcut or a biohacking fad. Dr. Yurth leaves listeners with a clearer, more skeptical eye for what is being marketed to them, and a working definition of healthy aging that shifts the focus from simply a lab report.

Join Us at the 2026 Super Age Games! Visit games.superage.com to learn more.

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BEAM Minerals: Plant-based liquid minerals for replenishing the foundational compounds your body needs to age well. Listeners can now get 20% off their first BEAM purchase by using the code "AGEIST" at checkout at BeamMinerals.com/ageist.

LMNT Electrolytes: Try the all-new Lemonade Iced Tea! Our #1 electrolyte mix 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

"If all we're doing is patching people back up for them to fall apart again, what are we doing wrong?"

"They actually found that 80% of people worsened after this surgery, not just didn't get better."

"I don't need an $800 immune test to tell me. I can look at your neutrophil [to] lymphocyte ratio."

Connect with Dr. Yurth

Boulder Longevity Institute

Human Optimization Academy

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LinkedIn

Facebook

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Click Here for the full interview transcript.

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We're bringing back our May 2025 conversation with Denise Kirtley, the founder of Rebellion Body. As we look back on this message, Kirtley is preparing to head to the Super Age Games with the event's largest team yet, more than 50 women strong. Kirtley built her coaching business on the idea that midlife is not a decline to manage, but a version of life women get to design on purpose. In this conversation, she explains why belief, not willpower, is usually the first thing that has to change before a body does. She also gets into the backlash she receives for posting bikini photos in her fifties, her wariness about AI-generated bodies flooding social media, and why she thinks the phrase "50 is the new 30" gets the whole conversation backward. Listeners will come away with an answer to the question that stalls most people before they ever begin: what do you do on the days you don't feel motivated at all?

Join Us at the 2026 Super Age Games! Visit games.superage.com to learn more and read more about Team Rebellion Body's prep for the Games: How the Super Age Games' Biggest Team Is Preparing

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: Try the all-new Lemonade Iced Tea! Our #1 electrolyte mix 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

"I always like to say my new thing is 50 is the new 50."

"I think people think motivation is like this mythical thing that all of a sudden the clouds open and you get the sign from the heavens that ‘Now is the time.’ It doesn't work that way. You just do it."

"We cannot worry about the things that naturally happen as we age."

Connect with Denise Kirtley

Rebellion Body
Instagram

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Newsletter

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Website

LinkedIn

Click Here for the full interview transcript.

Say hi to the AGEIST team!