Fibre might not be the “sexy” side of sports nutrition, but it’s one of the most overlooked foundations of runner health and performance. In this episode, we dig into the viral concept of fibremaxxing and whether it actually makes sense for runners.

You’ll learn what fibremaxxing really means, why most adults fall far short of fibre recommendations, and why decades of research support fibre’s role in gut health, chronic disease prevention, blood sugar control, and appetite regulation.

We also talk through:

• Where the fibremaxxing trend came from and what it gets right

• The best food sources of fibre and why variety matters more than any single “superfood”

• The difference between soluble and insoluble fibre and why runners need both

• Potential downsides of going too hard, too fast with fibre

• Timing fibre intake around training to avoid GI issues

• How very high fibre intakes can impact energy availability and performance

• Fibre supplements vs whole food sources (and when supplements can make sense)

Finally, we answer the big question: Should runners fibremaxx?
The short answer is yes, most runners would benefit from more fibre — but with smart timing, gradual increases, and an eye on total fueling needs.

Bottom line: Fibre is good, most runners need more, and like all good things, more isn’t always better if it interferes with fueling or performance.

Looking for the resources mentioned in today's episode?

⁠⁠⁠⁠⁠Get your free fueling audit here!⁠

And if you’re ready for more support, I’ve got options—whether it’s my brand-new ebook⁠ ⁠Fuel Smarter, Run Stronger⁠⁠, my group program⁠ ⁠The Fuel Train Recover Club,⁠⁠ or apply for limited spots in my personalized⁠ ⁠1:1 coaching ⁠⁠programs.

In this episode, I’m joined by Melanie Cote, the creator behind The Curvy Runner, and Fuel Train Recover Club member, to share her honest and inspiring journey into running. From starting with one-minute intervals to crossing the finish line of her first half marathon at RunDisney.

Melanie opens up about what motivated her to start running, why she chose to share her journey online, and how embracing a body-positive, joy-first approach completely changed her relationship with movement. We dive into her first half marathon training cycle, the mistakes she made, what surprised her most, and the moments she’s most proud of along the way.

We also get into the fueling side of things, like how Melanie realized she needed extra support, what nutrition advice she had to unlearn, and the changes she made to her fueling that paid off on race day. From carb loading and race-morning breakfast to pacing, mid-race fueling, and recovery, Melanie shares the real, behind-the-scenes details runners are always curious about.

This conversation is a powerful reminder that running doesn’t have to be about punishment, shrinking your body, or chasing perfection. It can be about confidence, consistency, and showing up exactly as you are.

Looking for the resources mentioned in today's episode?

⁠⁠⁠⁠⁠Get your free fueling audit here!⁠

And if you’re ready for more support, I’ve got options—whether it’s my brand-new ebook⁠ ⁠Fuel Smarter, Run Stronger⁠⁠, my group program⁠ ⁠The Fuel Train Recover Club,⁠⁠ or apply for limited spots in my personalized⁠ ⁠1:1 coaching ⁠⁠programs.

Hydration advice for runners has long been based on averages, assumptions, and trial-and-error. But what if you could actually see your sweat and electrolyte losses in real time?

In this episode, I’m so excited to be joined by Meridith Cass, Founder and CEO of Nix Biosensors.

Meridith Cass is the Founder and CEO of Nix Biosensors, a pioneering health tech company that developed the world’s first consumer-ready biosensor for real-time hydration monitoring. Under her leadership, Nix has been recognized by TIME's Best Inventions, Runner’s World Gear of the Year, and the CES Innovation Awards, and is transforming how athletes, military personnel, and everyday consumers manage hydration and performance. Prior to founding Nix, Meridith held leadership roles in healthcare and venture-backed startups, and earned her MBA from Harvard Business School. She is a passionate advocate for personalized health, data-driven recovery, and the future of wearable biosensing.

In this episode, we cover:

• The origin of Nix Biosensors and how a marathon experience led Meridith Cass to rethink hydration and electrolyte guidance

• How the Nix Biosensor works, what it measures, and why real-time sweat data is a game-changer for athletes

• Who sweat testing is most useful for, what athletes can realistically learn from their data, and common mistakes in interpretation

• How to turn sweat and sodium data into a practical hydration plan for training and racing

• The future of hydration science and how wearable biosensing could change the way everyday runners fuel and perform.

  
  

  Looking for the resources mentioned in today's episode?

  ⁠⁠⁠⁠⁠Get your free fueling audit here!⁠

  
  Curious what your sweat data looks like?
  Get 15% off the Nix Biosensors using my exclusive promo code SHNATIUK15.

  Learn more and grab yours at nixbiosensors.com

  If you’re tired of guessing your hydration and electrolyte needs, this is one of the most powerful tools you can add to your training toolbox.