Healthy Runner Podcast 287. Stop Making These Marathon Fueling Mistakes (Especially If You're Over 40) with Jennifer Giles, RDN
[Download] the Ultimate Guide to Mastering Your Marathon Feeling Strong
Are you unintentionally sabotaging your marathon with fueling mistakes? You're not alone. Most runners over 40 struggle with energy crashes, GI issues, cramping, or bonking — and it has nothing to do with fitness and everything to do with fueling.
In this episode, I'm joined by sports nutritionist, exercise physiologist, and speaker Jenn Giles, who specializes in marathon fueling for masters runners. Together, we break down the most common marathon nutrition mistakes and exactly how to fuel smarter so you can run strong from start to finish.
✅ Here's what you'll learn:
- The biggest fueling mistakes runners over 40 make (and how to fix them)
- Why bonking is totally preventable — if you follow this strategy
- Carb loading mistakes that cause race day disaster (and what to do instead)
- Exactly how many carbs per hour your body needs during a marathon
- Gel vs. chews vs. real food — what REALLY works?
- How underfueling leads to injuries, fatigue, and burnout
- A simple race week fueling plan anyone can follow
- The electrolyte formula to prevent cramping in long races
If you've ever hit the wall, struggled with race day stomach issues, or faded hard after mile 18, this episode will change how you fuel forever.
🎧 Listen now and learn how to fuel your miles like a master — so you can race strong, recover faster, and enjoy marathon running for life.
Want to run stronger, faster, and injury-free for your Marathon? The Healthy Runner Academy provides you the step-by-step system to finally stay consistent, avoid burnout, and prevent nagging injuries — all with expert coaching and a supportive community behind you.
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- Stop nagging injuries - Build a resilient running body - Get faster and stronger - Enjoy pain-free, consistent training
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Related Resources:
Listen to my previous conversation with Jenn and learn what to eat and drink before your long run here!
Listen to my previous episode on marathon nutrition here!
Listen to my previous episode on Beginner Marathon Training here!
Listen to my previous episode on Advanced Marathon Training here!
Listen to my previous episode on injury prevention for marathon training here!
Listen to my previous episode on marathon strength training guide: run stronger with these 3 essentials here!
Sign up for Free Healthy Runner Newsletter here! ➡︎ https://sparkhealthyrunner.com/newsletter/
A big thanks to CurraNz for your support for this episode!
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Learn more about the real science behind blackcurrant extract in my interview with Fleur Cushman in episode 233 on the Healthy Runner Podcast.
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Connect with Jenn Giles:
- Instagram: @jenngileseat4sport
- TikTok: @jenngileseat4sport
- Website: www.jenngilesrd.com
Connect with Dr. Duane:
- Instagram - @sparkhealthyrunner
- Sign up for the Healthy Runner Newsletter
- Join our Healthy Runner Facebook Community
- Subscribe to our YouTube Channel
- duane@sparkhealthyrunner.com
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