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The Strength Running Podcast

Fueling Do's & Don'ts (Carbs, Protein, & Supplements) with Stevie Lyn Smith, RD

The Strength Running Podcast

Jason Fitzgerald

Fitness, Sports, Running, Health & Fitness

4.71.5K Ratings

🗓️ 21 May 2026

⏱️ 62 minutes

🧾️ Download transcript

Summary

Stevie Lyn Smith is a board-certified specialist in sports dietetics, a Registered Dietitian, and an 11x Ironman competitor with an 11:35 PR. 

Today, we're exploring the most recent advances in sports nutrition for fueling:

  • How many carbs are now recommended per hour of hard running? What about workouts or long runs?
  • Is "proteinmaxxing" valuable for runners? What are its potential drawbacks?
  • How much dehydration is acceptable before a decrease in performance is inevitable?
  • Should every runner consider sodium bicarb for better performances?
  • A lot more...

A big thanks to Stevie for her expertise in helping us better understand the science of sports nutrition!

Extra Resources:

Thanks Boulderthon!

Boulderthon is a top 10 race in America according to USA Today and one of the best fall marathons according to Runner's World. With a 5k, 10k, half marathon, and marathon, Boulderthon offers an amazing fall destination race weekend right at the foothills of the Rockies. Use code STRENGTH20 for $20 off the marathon or half marathon.

Join me in Boulder, one of the top running destinations in the country, on September 27th, to experience the tight knit running community here, race on the epic streets of Boulder, and finish on historic Pearl Street. While I live in Denver, I travel to boulder probably once a week to run. It's arguably one of the best running locations in the United States.

There'll probably be cool and crisp fall weather for racing fast, too. And don't worry, Boulderthon is a BQ-eligible, USA Track & Field Sanctioned Event.

Boulderthon is on track to sell out again this year so don't miss out. Use code STRENGTH20 to save $20 on the marathon or half-marathon here and I hope to see you in Boulder this fall.

Thank you LMNT!

A big thanks to LMNT for their support of this episode! They make electrolyte drinks for athletes and low-carb folks with no sugar, artificial ingredients, or colors. They are offering a free gift with your purchase at LMNT. And this does NOT have to be your first purchase. You'll get a sample pack with every flavor so you can try them all before deciding what you like best.

And DOUBLE big news! Their newest flavor Lemonade Salt is now permanently available (it's now my favorite). They're also offering 12oz cans of sparkling LMNT water that has half the sodium concentration of a packet. Check them out.

LMNT's products have some of the highest sodium concentrations that you can find. Anybody who runs a lot knows that sodium, as well as other electrolytes like magnesium and potassium, are essential to our performance and how we feel throughout the day.

LMNT is my favorite way to hydrate. I'm now in the habit of giving away boxes of LMNT at group runs around Denver and Boulder and everyone loves this stuff.

Boost your performance and your recovery with LMNT. They're the exclusive hydration partner to Team USA Weightlifting and quite a few professional baseball, hockey, and basketball teams are on regular subscriptions. So check out LMNT to get a free sampler pack and get your hydration optimized for the upcoming season.

Transcript

Click on a timestamp to play from that location

0:00.0

Ready, set, go!

0:04.1

This is episode 459 with registered dietician, Ironman triathlete, and board-certified specialist

0:12.4

in sports dietetics, Stevie Lynn Smith. Welcome to the Strength Running podcast. I'm Coach Jason Fitzgerald, and I want to help you become a better runner. Don't miss

0:31.7

Strengthrunning.com, our home base where you can find training programs, our award-winning content

0:37.0

library, and our free

0:39.0

email courses. And if you're on the lookout for more Q&A with a registered dietitian,

0:44.5

go to strengthrunning.com slash nutrition hyphen QA for even more. Now, I couldn't do this podcast

0:52.0

without the help of our partners. If you get value from the show,

0:55.7

you can support us by supporting our sponsors. We are supported by Boulderthon, one of the top 10

1:01.3

races in America, according to USA Today, and one of the best fall marathons, according to runners'

1:07.0

world. They have a 5K, a 10K, half marathon, and marathon, and they offer an amazing

1:13.6

fall destination race weekend right at the foothills of the Rockies. Use code strength 20 for $20

1:20.6

off the marathon or half marathon at boulderthon.org. So join me in Boulder, one of the top running destinations in the country

1:29.5

this fall on September 27th. You'll experience the tight-knit running community here,

1:35.9

race on the epic streets of Boulder, Colorado, and finish on historic Pearl Street. You're going

1:41.8

to love one of the country's epicenters of running. And there

1:45.5

will probably be cool and crisp fall weather for racing fast in late September. And don't worry,

1:50.9

Boulderthon is a BQ eligible USA track and field sanctioned event. We do things right here in Colorado.

1:57.6

Now, Boulderathon is on track to sell out again this year, so don't miss out. This race is

2:02.1

popular for a reason. Use code strength 20 to save $20 on the marathon or half marathon at

2:09.2

boulderthon.org, and I hope to see you in Boulder this fall. A big thanks to Element for

2:14.7

their support of this episode. Element is a high sodium, no sugar,

...

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