284. Game-Changing Study on High Carb, Iron Levels and Energy Intake, New World Records, Race Week Nutrition, and Offseasons!

Some Work, All Play

David Roche and Megan Roche

Running, Sports

4.8 • 2.1K Ratings

🗓️ 11 November 2025

⏱️ 92 minutes

🔗️ Recording | iTunes | RSS

🧾️ Download transcript

Summary

We chocolatized our life before this amazing episode! The main topic was a new study on elite marathoners measuring responses to different carb intakes, finding a 2.6% lower oxygen cost at 120 grams per hour compared to 60 grams per hour. It showed massive carb oxidation rates at high outputs. In 10 years, we might look back on this study as a game-changing moment in the science of endurance performance.

And this one had so many cool topics! Other topics: Megan’s biggest uphill treadmill threshold workout, David’s Zwift racing, the strange connection between energy intake and iron deficiency, how hydration could influence stress responses, the predictive power of smiling in pre-race photos, Anne Flower’s 50 mile world record, other records at Tunnel Hill, whether to walk onto the track team, offseason layoffs, race week nutrition, and AI messaging.

Stick around for a beautiful affirming Listener Corner message! Or you can stick around to learn what we do with the Tupperware. Your choice!

We love you all! HUZZAH!

-David and Megan

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Transcript

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0:00.0	Woo!
0:01.0	Welcome to the Some Work All Play podcast.
0:03.1	We are so happy with you today.
0:04.5	Happy Tuesday.
0:05.2	This Tuesday.
0:21.0	And I'm thinking about the lengths I would go for a good race on this Tuesday. The lengths you would go for a good race. I know you'd go pretty far, but what are you talking about? I'd actually go real far. I'm talking about the idea that we just watched Des Linden on Subway Takes on Twitter, and she was talking about the fact that she would not poop herself
0:22.7	to get a gold medal.
0:24.6	Yeah, yeah, Des Lyndon on Subway Takes on Twitter, and she was talking about the fact that she would not
0:22.0	poop herself to get a gold medal. Yeah, yeah, yeah. It was kind of an interesting take. I feel like
0:27.3	we might have gotten it out of context or something, because here's the quote from Des Lyndon.
0:31.6	There's no race. There's no medal. There's no achievement that would be worth shitting my pants.
0:36.4	And I was like, Des, come on. I would shit my pants for a lot of things, including like a solid workout Wednesday. Just a solid workout Wednesday. Even like an easy ride, I'd even do it if I just didn't want to get off the treadmill. And I have. I have. Wow. That's really taking it far. And I think Des, like, you know,
1:10.5	Des is an all-time beast. And she probably, she would shit her pants and win an Olympic medal of some sort and do it with swag. It's like like she's coming at it from that perspective. But I was like, Des, I would do a lot of things. Yeah. I feel like this is the official podcast for people that would shit their pants for a lot of things.
1:13.4	I mean, you would go real far, right?
1:13.7	Yeah.
1:11.7	Honestly, if I was writing an article and I really like the thought process I was on, it's coming out. I'm not a whole mid-in for any reason. I mean, what I'm probably showing here is that I don't have a great GI system more than anything. That's true.
1:28.5	It's like we're practiced. Not only are we practiced, but we've changed our children's diapers
1:32.2	recently and we're like very comfortable with this stuff. Yeah, this is right up our alley. So
1:36.1	Deslinan still our hero, but maybe not our poop hero. Not all heroes. We're diapers.
1:44.7	Perfect. We have the best episode for you today. Not all heroes. We're diapers. Perfect.
1:45.5	We have the best episode for you today.
1:47.4	A quick roadmap.
	...

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