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Human Performance Outliers Podcast with Zach Bitter

Episode 479: Is Low Carb Performance Misplaced? | Jonah Rosner

Human Performance Outliers Podcast with Zach Bitter

Zach Bitter

Fitness, Health & Fitness, Sports, Running

4.8622 Ratings

🗓️ 13 March 2026

⏱️ 74 minutes

🧾️ Download transcript

Summary

Jonah Rosner is a sport scientist, performance coach, and the founder of Marathon Science, a platform dedicated to translating cutting-edge endurance research into practical insights for runners and hybrid athletes. Jonah previously worked in the NFL and now focuses on helping endurance athletes train smarter through evidence-based training, nutrition, and performance strategies.


Jonah: @rosnerperformance | Newsletter: marathonscience.beehiiv.com

Free resources for audience from Jonah

1. The Gel Cheat Sheet - breaks down race-day fueling strategy, gel timing, and the carbohydrate recommendations we discussed. Exactly the kind of practical takeaway your audience can use immediately. https://marathonscience.beehiiv.com/new-gel-guide

2. The Foot and Calf Strength Plan - a free gym program targeting the musculature below the knee that we touched on when talking about BFR and neuromuscular durability for endurance athletes. Covers calf raises, single-leg work, and progressive loading. https://marathonscience.beehiiv.com/foot-calf-strength-guide-new

Episode Sponsors:

ProBio: probionutrition.com/endurance Code: Endurance (20% Off)

LMNT: drinkLMNT.com/HPO (free sample pack with purchase)

deltaG: deltagketones.com Code: BITTER20 (20% Off)

Training Peaks: https://bit.ly/4bN041t Code HPOPOD (free 14-day trial)

 

Transcript

Click on a timestamp to play from that location

0:00.0

You know, the one thing I do find interesting is I remember when, specifically an ultra running,

0:06.0

and then marathon running too, when we started seeing this kind of like big wave of like carbohydrate

0:11.0

kind of swing in into the conversation was my first thought was, all right, how is this going to get

0:19.0

misapplied and create a backlash?

0:22.2

And then we're going to see like in five, 10 years this like pendulum swing back and all

0:26.3

a sudden like low carb will have another like a bump in popularity for a while as people

0:32.3

like blow up their digestive systems on races and decide, okay, that's, I'm not just going to titrate

0:36.5

down. I'm going to go the opposite direction entirely. So I do you think very nutrition through the lines of how can

0:41.0

I manipulate as many nutritional variables as possible to improve my recovery? And that's going to

0:46.1

let me train more at higher volume training, which would lead to better performance. I think

0:50.2

is something I find very fascinating. And you can do that across other modalities besides nutrition to optimize your recovery.

0:56.7

But I think nutrition is a very interesting one where it's like you view nutrition as a way to support training in recovery as much as possible.

1:02.3

It's a recovery and morality.

1:06.6

Thanks for tuning into this episode of the Human Performance Outliers podcast with

1:11.2

Zach Bitter.

1:13.3

I want to thank all my listeners for taking the time to check out my podcast. As a way to thank you,

1:18.7

I am raffling off a free 30-minute consultation for anyone who shares an episode or leaves a review

1:24.0

on your preferred platform. Just tag me or send me a screenshot and I will enter you in the monthly raffle.

1:31.1

If you want to contact me, check out my coaching services or access additional podcast

1:35.6

resources, including joining the show's Patreon page.

1:39.1

Please head over to Zachbitter.com or send me an email at HPO podcast at gmail.com.

1:46.5

A big thanks to Element Electrolites, Delta G ketones, pro-bio, pro-blend, and

...

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