He came out of nowhere, tied a backyard ultra, and accidentally built one of running's most compelling brands—all before turning 22. 

Now Kim Goldwald is back on the show, and this time, he left Texas without the crown.

Kim returns to The Running Effect fresh off his second Go One More Ultra, where he finished 58 loops (241.5 miles) in brutal, rain-soaked conditions before his right glute gave out for good. It's the first backyard loss of his career, and he couldn't care less. In this conversation, Kim breaks down what actually changed—not the outcome, but the person who walked off those trails.

He talks about the version of himself that "died" at this race: the one who was always sprinting to the next drop, the next event, the next milestone without ever stopping to feel any of it.

He opens up about Rappid Run’s explosive growth (from $70k in total revenue before June 2024 to $900k by year's end, and $400k in sales over a single race weekend) and why the numbers aren't the point anymore. The brand's real mission, he says, is simple: inspire people, change lives, mean something.

He's 22. He's already different. And he's coming for everybody next time.

Tap into the Kim Gottwald Special.

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The woman treating Olympic athletes says the sport has been coaching women wrong for decades, and she's built the clinic, the science, and the summit to prove it.

Dr. Lyndsay Centrowitz is a Doctor of Physical Therapy, pelvic health specialist, and USATF medical provider on a mission to rebuild how running treats the female body. She owns StrongHER, a women's-only PT practice in Park City, Utah, and trains clinicians nationwide through The Pace Academy.   

But her work goes far beyond the treatment table.

The 2025 Canadian Postpartum Guidelines just rewrote the rulebook for female runners returning after childbirth, ditching the old "wait six weeks" standard in favor of movement that starts immediately and builds toward 120 minutes of moderate-to-vigorous activity per week. 

RED-S is still silently destroying careers at the high school level, and many coaches have received zero training on it. This August, Lyndsay is hosting the Female Runner Summit in Park City specifically to intercept that problem before it reaches campus.

She is also a new mother and someone with a front-row seat to what happens when elite athletes face the hardest transitions of their careers. 

We are sitting down with one of the most important voices in women's running medicine for a conversation that is long overdue.

Tap into the Dr. Lyndsay Centrowitz Special.

If you enjoy the podcast, please consider following us on Spotify and Apple Podcasts and giving us a five-star review! I would also appreciate it if you share it with your friend who you think will benefit from it. 

Comment the word "PODCAST" below and I'll DM you a link to listen. If this episode blesses you, please share it with a friend!

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He's 0.08 seconds from the four-minute mile, and Festival of Miles is the race he's had circled all year. 

Caden Leonard arrives in St. Louis as the top-ranked high school miler in the country—coming off a 4:00.07 indoor and a 4:01.02 outdoor, the fastest mile ever run by a prep athlete on Texas soil. Last year he ran this same race through a stress reaction nobody knew about.

This year he's healthy, hungry, and done waiting. 

In this conversation, Caden breaks down exactly how he plans to race the most loaded high school mile field of the year– with Jackson Spencer, Quentin Nauman, Alan Webb's record hovering in the background—and why his strategy isn't to chase a time, it's to win. He talks about extending the kick to make the hurt last longer, staying on the pace instead of reacting to it, and what it cost him last year to give guys like Quentin a head start he couldn't make up.

He also gets into what sub-4 at Festival of Miles would actually mean; not just for him, but for his dad, who has now coached two Carroll milers to the doorstep of the barrier. Caden watched Reed Brown do it online as a kid and decided that was the standard. 

Festival of Miles is where he finds out if he's right.

Tap into the Caden Leonard Special.

If you enjoy the podcast, please consider following us on Spotify and Apple Podcasts and giving us a five-star review! I would also appreciate it if you share it with your friend who you think will benefit from it.

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Martin Dugard has spent his whole life at the intersection of running and history, and The Long Run is where they finally collide.

Dugard is a #1 New York Times bestselling author with over 12 million copies sold, a three-time Raid Gauloises adventure racer, a co-holder of the global circumnavigation speed record, and a cross country coach who has built California state championship programs from scratch over two decades. 

And he's earned every word of this book.

In the 1970s, running was a fringe sport. What happened in between is one of the greatest untold stories in sports history, and Dugard just wrote the book on it. The Long Run drops April 14, and he joins the show to break down exactly how Frank Shorter's 1972 Olympic gold, Steve Prefontaine's counterculture fire, Joan Benoit Samuelson's 1984 Olympic breakthrough, and Grete Waitz's nine New York City Marathon victories turned a niche obsession into a global movement.

But this isn't just a history lesson. He gets into the coaching philosophy behind the 1970s greats, what today's running boom has in common with the first one, and why the athletes who built this sport still don't get the credit they deserve.

Tap into the Martin Dugard Special.

If you enjoy the podcast, please consider following us on Spotify and Apple Podcasts and giving us a five-star review! I would also appreciate it if you share it with your friend who you think will benefit from it. Comment the word“PODCAST” below and I’ll DM you a link to listen. If this episode blesses you, please share it with a friend!

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Jonny Davies ran 119 miles on a Texas ranch, vomited up half a bottle of water, and still had to be talked out of going back for one more lap.

Fresh off his second BPN Go One More Last Man Standing Ultra (and 17 more miles than the year before), Jonny sits down with Dominic to unpack what really happens when the race strips everything away.

He gets into the brutal physics of surviving Texas heat at 105°F as a 6'4", 220 pound guy from the UK, the moment his crew drew the red line and pulled him from the race, and the stat that stopped him cold before his first G1M: 80% of people who quit a backyard ultra quit in the chair, not on the course. 

He wasn't going to be one of them.

But this conversation moves well beyond race day. 

Jonny traces the philosophy that carried him through a devastating breakup right after Run the Capitals—his 596 mile, 11-day run through every UK and Ireland capital—and explains how the same stubbornness that kept him moving on broken feet is the thing he now leans on in ordinary life. 

His dad's voice from the rugby pitch cuts through every dark moment: you can't play rugby on the floor. His work with CALM, the UK suicide prevention charity, gives everything else its weight. And when Dominic asks who he's trying to become, Jonny's answer is disarmingly simple: 

just better than yesterday, every day, no destination required.

Tap into the Jonny Davies Special.

If you enjoy the podcast, please consider following us on Spotify and Apple Podcasts and giving us a five-star review! I would also appreciate it if you share it with your friend who you think will benefit from it.

S H O W  N O T E S   

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Forty-five days ago, he told TRE he didn't know if he liked running anymore. 

Then he ran 37 loops. 

Aleksander Piotr Lingauer showed up to the 2026 BPN Go One More Ultra carrying more than a race bib. He carried a childhood spent in foster care across England and Germany, a nervous system that had been shutting down in the weeks before the start line, and a verse from Joel written on his shirt.

What he left with was something harder to name—and that's what this conversation is about.

This is the post-race debrief Dominic promised to deliver in person. From the moment Aleksander flew to New York on a swollen ankle just to run 8K with a guy he admired on the internet, to crewing for Kim Gottwald through storm-halted loops in Texas, to finally hearing his own name called as a competitor—every decision in this story was made on instinct, and every one of them changed his life.

On the course: barefoot through the mud, keeping strangers in the race when they were about to quit, hallucinating a dragon somewhere in the second night, and fighting his way through doubt that even Mark Dowdle admitted he'd felt.

Aleksander's answer to all of it was simple: if you fail to try, doubt wins.

He left the loop an honest man. 

Tap into the Aleksander Lingauer Special.

If you enjoy the podcast, please consider following us on Spotify and Apple Podcasts and giving us a five-star review! I would also appreciate it if you share it with your friend who you think will benefit from it. If this episode blesses you, please share it with a friend!

If this episode blesses you, please share it with a friend!

S H O W   N O T E S  

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https://www.youtube.com/channel/UClLcLIDAqmJBTHeyWJx_wFQ

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Most people spend years chasing a record. Jane Hedengren did it on her first try.

On April 3rd at the Stanford Invitational, BYU freshman Jane Hedengren stepped onto the track for her first-ever collegiate outdoor race and ran 30:46.80, the fastest collegiate 10,000m in NCAA history. She broke Parker Valby's record by nearly four seconds. 

That's who TRE is sitting down with this week.     

But this episode isn't really about the record. It's about what it takes to perform at that level before you've had time to be afraid of it. Jane is 19 years old, the daughter of an All-American runner, competing for BYU under head coach Diljeet Taylor—and she is doing things in her freshman year that most distance runners never do in a career. Two NCAA indoor titles. The indoor 5,000m record. And now this.

The numbers are already legendary. 

What this conversation goes after is everything behind them: the race tactics, the mindset between back-to-back NCAA gold medals, the training system that built her, and the question that’s been nagging many in the industry: does she let herself think about the 2028 Olympics?

TRE does. And you will too by the end of this one.

conversation that is long overdue.

Tap into the Jane Hedengren Special.

If you enjoy the podcast, please consider following us on Spotify and Apple Podcasts and giving us a five-star review! I would also appreciate it if you share it with your friend who you think will benefit from it. 

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Quentin Nauman is already a legend in Iowa. This spring season is the encore

The greatest prep distance runner in Iowa history enters his final outdoor season with 10 state titles, two national championships, and one goal left unfinished.  

Two weeks ago at Nike Indoor Nationals, Nauman anchored Iowa's DMR team to a national title in 9:46.23, edging Texas by under a second in a dramatic final 200 meters. For an athlete defined by solo dominance, it was a glimpse of something new. 

Now he's back for his last run at the Drake Relays triple sweep (800m, 1600m, 3200m), and a legitimate shot at the national high school mile record before heading to Oregon in the fall.

This is a return visit for Quentin, and the story has gotten bigger. This episode is part of The Running Effect's ongoing Festival of Miles series.

One more outdoor season. One more shot at the record. One last chance to cement a legacy that's already unlike anything Iowa has ever seen. 

In this episode, Quentin opens up on the NIN team win, the Oregon decision, coach Elaina Biechler, and what it actually feels like to be chasing something when you've already won everything.

Tap into the Quentin Nauman Special.

If you enjoy the podcast, please consider following us on Spotify and Apple Podcasts and giving us a five-star review! I would also appreciate it if you share it with your friend who you think will benefit from it. Comment the word“PODCAST” below and I’ll DM you a link to listen. If this episode blesses you, please share it with a friend!

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If this episode blesses you, please share it with a friend!

S H O W  N O T E S  

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Colorado-born elite runner turned entrepreneur David Perry is here—a guy who went from captain of Adidas Runners NYC to founder of one of the most talked-about jewelry brands in the athletic world. 

David gained notoriety in the NYC running community before founding his own luxury jewelry brand, David Perry Jewelry. He was an All-America runner at the University of Portland, where he competed in Cross Country and Track & Field.

As a middle-to-long-distance specialist, he has times like 3:45.61 in the 1500m and 23:18 in the 8,000m under his belt. Post-collegiately, he became a captain for Adidas Runners NYC, while staying heavily involved in the city's running culture. Although he set out in 2018 to make the U.S. Olympic Marathon trials and failed to do so in 2020, his ambition is nothing to frown at; he also signed Olympic gold medalist Grant Holloway as the brand's first-ever ambassador in 2024.

From the trails of Colorado, to the roads of New York City, to the Olympic stage in Paris, David Perry's journey is proof that your biggest ambitions don't always look the way you planned them. He set out to make the Olympic Marathon Trials. Instead, he built a brand that made it to the Olympics anyway.

Tap into the David Perry Special. 

If you enjoy the podcast, please consider following us on Spotify and Apple Podcasts and giving us a five-star review! I would also appreciate it if you share it with your friend who you think will benefit from it. Comment the word“PODCAST” below and I’ll DM you a link to listen. If this episode blesses you, please share it with a friend!

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He won a world title on spring break. Monday morning, he was back in class.

Cooper Lutkenhaus is 17 years old and the youngest world champion in the history of track and field. Weeks after Toruń, he sits down with The Running Effect to answer the question nobody else has asked: what does life actually look like on the other side of history?

The Nike contract signed at 16. The high school coach he still trusts with everything. The Tokyo wound that quietly powered an unbeaten indoor season from the inside out. Stockholm is on the calendar. June 7, Diamond League, the best half-milers alive. This episode is the discussion before that.

His winning time in Poland was 1:44.24—third fastest in World Indoor Championships history. His outdoor PR is 1:42.27, the World U18 record and the U.S. high school record, set at the USATF Outdoor Championships in July 2025. He was 17 years and 93 days old when the gold went around his neck, and no individual world champion (indoors or outdoors, in any event) has ever been younger. He ran seven races this indoor season. He won all seven.

The budding legend of Cooper continues here with TRE.

Tap into the Cooper Lutkenhaus Special.

If you enjoy the podcast, please consider following us on Spotify and Apple Podcasts and giving us a five-star review! I would also appreciate it if you share it with your friend who you think will benefit from it. Comment the word“PODCAST” below and I’ll DM you a link to listen. If this episode blesses you, please share it with a friend!

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S H O W  N O T E S  

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