Dr. Kate Ackerman, co-founder and president of the WHSP Institute (Women's Health, Sports & Performance) and head doctor for US Rowing, joins the show to walk through one of the most important and least understood topics in women's endurance sport: Relative Energy Deficiency in Sport, or RED-S.

When Dr. Ackerman made the US national rowing team during her first year of medical school over 25 years ago, she opened her sports medicine textbook and noticed something strange — women were a chapter. A single chapter. Every protocol she was training under had been studied in men. That gap shaped her entire career, from founding work in the female athlete space to helping the International Olympic Committee design the RED-S clinical assessment tool used today.

In this episode, Steve Gonser sits down with Dr. Ackerman to unpack how the field has evolved — from the original 1990s Female Athlete Triad to the broader, system-wide picture we have now. They walk through the science of what's actually happening when energy availability drops: the body's caveman-era survival logic, the reproductive system going first, and the cascade through thyroid, cardiovascular, GI, cognitive function, recovery, and ultimately performance. Performance is the framing Dr. Ackerman has found resonates with athletes who don't yet care about osteoporosis or missed cycles.

The conversation then walks the full female athlete lifespan. Adolescents going through peak height velocity before peak bone mineralization, and why that window is so vulnerable. The social media feeds quietly reinforcing thigh-gap culture for teen girls while the rest of us scroll past entirely different content. Postpartum runners trying to chase a pre-baby body while breastfeeding pulls calcium directly from bone. The bone density arc — 90% of peak bone mass built by age 18 — and what that means for everyone after. Why runners' linear, single-plane loading doesn't build bone as well as multi-directional movement does, and why even elite male cyclists end up with osteoporotic bones. And finally, perimenopause and menopause: the symptom cornucopia, the GLP-1 question, the supplement noise, and the lifestyle levers that actually move the needle.

Throughout, Dr. Ackerman makes a clear point: women have real questions, the answers are starting to come, but the space has filled with people on Instagram calling themselves experts. Knowing where to look — and which clinicians, dieticians, and resources are actually credentialed — is half the battle.

If you're training through your 40s, raising a young athlete, navigating perimenopause, or trying to make sense of why your body is responding differently than it used to… this episode is the framework you've been looking for.

Connect with WHSP Institute:⁠

https://www.whspmedical.com/institute⁠⁠

https://instagram.com/whsp_institute⁠

Connect with Dr. Ackerman:

https://www.instagram.com/drkateackerman/

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https://instagram.com/runsmartofficial⁠⁠

https://runsmartonline.com⁠

Saucony pro runner and NYU medical student Felicia Pasadyn returns to Early Miles for the conversation no one wanted to record. Months after signing her first pro contract, Felicia ran a 32:04 PR to win The TEN in late March… and days later was diagnosed with a calcaneal stress fracture. Boston was off the calendar.

In this episode, Steve Gonser sits down with Felicia to walk through the full timeline. The delayed symptom onset. The diagnostic journey from a clean X-ray through to the MRI at NYU that finally caught it. The unusual location of the injury and what likely tipped a manageable training load over the edge. Felicia also shares what happened when she fed her entire training log into ChatGPT and got back the word "psychotic"… and what that prompted her to reconsider about living almost exclusively in zones three through five, skipping rest days, and running high-risk, high-reward when the next five years of residency are about to make that style impossible anyway.

The conversation also digs into territory most running podcasts skip. As a soon-to-be diagnostic radiologist talking to a PT with fifteen years of running clinical experience, Felicia and Steve land on opposite sides of an honest debate about imaging, conservative care, and when an MRI actually changes management. They cover RED-S and hypothalamic amenorrhea, why a full hormonal workup mattered even when she suspected the injury was purely mechanical, and how the conversation around energy availability has finally started to normalize in elite endurance sport.

Felicia then talks through her return-to-run plan with her ortho, the cross-training base that gives her more options than the average injured runner, and the mental traps Steve has seen athletes fall into at every level — the bargaining, the phantom pains, the slow creep of "just ten more minutes." She's heading into a Cleveland Clinic radiology residency in Florida with two weeks of vacation per year for the next five years, and she's clear-eyed that this chapter of her running will look different. Slower, healthier, more patient. And, by her own framing, worth it.

If you've ever come back from a stress fracture, wrestled with whether to push for imaging, or felt the tension between training hard now and training sustainably for the long haul… this one will land.

Catch Felicia's first appearance on Early Miles here:

https://runsmartapp.com/felicia-ep1

Connect with Felicia:https://instagram.com/feliciapasadyn

https://instagram.com/wellfeliciafit

Connect with RunSmart:https://instagram.com/runsmartofficial

https://runsmartonline.com

Bill Armstrong, co-founder of Neversecond, joins the show to break down one of the biggest shifts happening in endurance sports today… fueling.

For years, endurance athletes were told to take in minimal carbohydrates during training and racing. That approach shaped how runners fueled for decades. But as the sport has evolved, so has the understanding of how much fueling actually impacts performance.

In this episode, Steve Gonser sits down with Bill to unpack the full story behind Neversecond and the evolution of modern fueling strategies. From early misconceptions around carbohydrate intake to the breakthrough of multiple transportable carbohydrates, Bill explains how the science has progressed and why athletes are now fueling at levels once thought impossible.

The conversation goes beyond theory and into application. They discuss what happens physiologically when you underfuel, how fueling impacts performance late in races, and why consistency and precision matter more than most runners realize.

Bill also shares the origin of Neversecond, the gap he saw between research and real-world products, and how the company set out to build a system that athletes could trust and execute on race day.

If you’ve ever hit the wall, struggled to maintain pace late in a run, or felt unsure about how to fuel… this episode will give you a clearer framework to work from.

Connect with NEVERSECOND:

https://instagram.com/never.second/

https://never2.com/

Connect with RunSmart:

https://instagram.com/runsmartofficial

https://runsmartonline.com

We recorded this episode at 5 a.m. to catch Ethan Shuley while he’s in Japan living and training.

Before running 2:07 and landing one of the top 10 fastest U.S. marathon times, Ethan’s start in the sport wasn’t what you’d expect. He talks through the early days of struggling to keep up, skipping races, and not enjoying running… and the moments that shifted his mindset.

In this conversation, we get into:

• His early experience with running and what almost pushed him away from the sport
• The turning point that changed how he approached training
• What his current setup looks like training in Japan
• How his perspective on effort, consistency, and competition evolved

This is a look at what actually shaped one of the fastest marathoners in the U.S. right now.

Connect with our founder & host:

⁠⁠https://www.instagram.com/stevegonserdpt/⁠

⁠Connect with our guest:

⁠https://www.instagram.com/ethanshuley/

If you’d like to learn more about runsmart. Personalized running, strength, and recovery plans designed by Physical Therapists.

Check us out at:

⁠⁠https://runsmartonline.com/⁠⁠

⁠https://www.facebook.com/runsmartofficial⁠⁠

⁠https://www.instagram.com/runsmartofficial⁠⁠

⁠https://www.tiktok.com/@runsmartofficial

Running a 2:30 marathon while attending medical school is a rare balancing act. In this episode, Steve Gonser sits down with Elle Orie to explore the path from multi-sport athlete in Orchard Park, New York, to Cornell distance runner, Colorado steeplechaser, and emerging elite marathoner. Gabrielle reflects on her late start in competitive running, her development through collegiate track and cross country, and how a strong aerobic base from swimming shaped her endurance progression.

The conversation also dives into the realities of pursuing elite-level performance while managing the demands of medical training. Elle discusses waking up at 3 a.m. for runs during clinical rotations, building toward 100-mile weeks, and the emotional swing of missing the Olympic Trials standard by just 11 seconds before breaking through with a 2:30 marathon at the Chevron Houston Marathon. Along the way, she shares lessons on fueling, recovery pacing, staying healthy, and keeping the sport fun even while chasing world-class goals.

Connect with our founder & host:

⁠https://www.instagram.com/stevegonserdpt/

⁠
Connect with our guest:

https://www.instagram.com/gabrielleorie/

https://www.linkedin.com/in/elle-orie-5444841a9/

If you’d like to learn more about runsmart. Personalized running, strength, and recovery plans designed by Physical Therapists.

Check us out at:

⁠https://runsmartonline.com/⁠

https://www.facebook.com/runsmartofficial⁠

https://www.instagram.com/runsmartofficial⁠

https://www.tiktok.com/@runsmartofficial

In this episode, we sit down with registered sports dietitian Shannon Wilson to break down the most common fueling mistakes runners make—starting with chronic underfueling. Together, they outline practical ways runners can match intake to training load, recognize red flags of low energy availability, and shift away from weight-loss goals during a marathon build to reduce injury risk and protect performance.

The conversation also covers simple, repeatable strategies for long-run prep, carb loading, and during-run fueling—plus how to trial gels, candy, and drink mixes to find what works. We close with recovery basics, including post-run timing, sleep-supportive nutrition habits, and a realistic approach to supplements and caffeine for runners who want better consistency without overcomplicating the process.

Connect with our founder & host:

⁠https://www.instagram.com/stevegonserdpt/ ⁠

Connect with our guest:

https://www.shannonwilsonrd.com/

https://www.instagram.com/sportsdietitianshannon/

If you’d like to learn more about runsmart. Personalized running, strength, and recovery plans designed by Physical Therapists.

Check us out at:

⁠https://runsmartonline.com/⁠

⁠https://www.facebook.com/runsmartofficial⁠

⁠https://www.instagram.com/runsmartofficial⁠

⁠https://www.tiktok.com/@runsmartofficial

Joe Whelan’s path to 2:09 was not linear. From breaking his kneecap in college to battling recurring stress fractures, he spent years navigating setbacks, under-recovery, and training imbalances. After stepping away from the sport and later returning through self-coached marathon builds, Whelan steadily rebuilt his engine—learning how fueling, sleep, controlled volume progression, and smarter intensity distribution separated 2:15 fitness from 2:09 performance.
In this episode, he breaks down the mindset shift that fueled his breakthrough, the decision to leave full-time work to prioritize recovery, and the tactical execution behind his course-record win at the Austin Marathon. Whelan also reflects on Olympic Trials preparation, pacing discipline, race-day strategy, and his goal of climbing into the top 15 all-time U.S. marathon performances as he builds toward 2028.
Connect with our founder & host:

⁠https://www.instagram.com/stevegonserdpt/ ⁠

Connect with our guest:

https://www.instagram.com/jpwhelan23/
If you’d like to learn more about personalized running, strength, and recovery plans designed by Physical Therapists, check us out at:

⁠https://runsmartonline.com/

https://www.facebook.com/runsmartofficial⁠

https://www.instagram.com/runsmartofficial⁠

https://www.tiktok.com/@runsmartofficial

In this conversation, Jeffrey Durmer discusses his journey from athlete to sleep expert, explores the evolution of sleep medicine, the impact of consumer technology on sleep tracking, and the significance of heart rate variability (HRV). He emphasizes the effects of sleep deprivation, cultural attitudes towards sleep, and strategies for optimizing sleep for athletic performance, including the importance of circadian rhythms and food timing. In this conversation, Dr. Jeffrey Durmer discusses the significance of chronotypes in determining sleep patterns, the importance of recovery sleep for athletes, and the impact of mood on sleep quality. He emphasizes the benefits of light therapy for enhancing mood and performance, and outlines best practices for creating a sleep-friendly environment. The discussion also covers the effects of alcohol and diet on sleep and concludes with insights into the future of sleep monitoring and the integration of AI to personalize sleep health.

Connect with our founder & host:

⁠⁠https://www.instagram.com/stevegonserdpt/⁠ ⁠

Connect with our guest:

Website: ⁠https://www.happysleep.com/

Instagram: https://www.linkedin.com/in/jeffreydurmer/

If you’d like to learn more about runsmart. Personalized running, strength, and recovery plans designed by Physical Therapists. Check us out at:

⁠⁠https://runsmartonline.com/⁠⁠ ⁠

⁠https://www.facebook.com/runsmartofficial⁠⁠

⁠⁠https://www.instagram.com/runsmartofficial⁠

https://www.tiktok.com/@runsmartofficial⁠