303. The Weird Science of Carb Mouth Rinses, VO2 Max Limits, Fueling for Performance, Cross Training, and Cramp Prevention!

Some Work, All Play

David Roche and Megan Roche

Running, Sports

4.8 • 2.1K Ratings

🗓️ 24 March 2026

⏱️ 92 minutes

🔗️ Recording | iTunes | RSS

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Summary

We put on our spacesuits for this great episode! The main topic was a study finding that just putting a dissolvable carb strip on the tongue could improve performance by 3% in a short time trial. What?! How can carb strips and mouth rinses improve performance? We discuss the weird implications of cephalic-phase responses.

And this one was full of amazing topics! Other topics: our first movie theater trip in 3.5 years, a discussion of low energy availability and fueling for performance, Keely Hodgkinson discussing gaining power before her recent world championship win, why cross training is the hottest training topic, Courtney Dauwalter doing GOAT things, a strange study on hot underwater biking, plus a Q+A on VO2 max limitations, the many meanings of “talent,” preventing cramps, fueling and menstrual cycle disturbances, inflammation and adaptation, and a hypothetical coaching academy.

May your saunas and tubs be even hotter than our astronaut costumes. We love you all! HUZZAH!

-David and Megan

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Transcript

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0:00.0	Woohoo. Welcome to the Some Work All Play podcast. We are so happy with you today. Happy Tuesday. It's Tuesday. And we're wearing our finest space suits on this Tuesday. Oh my gosh. Megan, you look amazing right now. You got me the spacesuit. I love it. It's pink. Just in all pink. And we're talking full jumpsuit from ankle to head. And you look so sexy. Oh my gosh.
0:21.0	I never knew we'd have an astronaut looking like this. Aw, thank you. Should I wear it to school pickup? Yeah, be that mom that walks in. Absolutely, you're going to wear it the rest of the day, right? It's actually great because Leo is not old enough yet to be embarrassed by me. So I'm like, I'm going to pick you up at school in a full space suit. Okay, so the reason I got U.S.
0:37.7	face suit is because we're going to an IMAX screening of Project Tail Mary right after we record today. At 3.30 on a Monday. Yeah, we haven't done a movie since Leo was born. So three and a half years ago, and it's going to be so special. I've never been the type of person that dresses up for anything. I'm not one of those, but I'm like, let's commemorate this and make it special. Okay, I love this outfit. You're wearing a blue space suit right now, recording in a space suit. I think this should be our Halloween costume for the next four years. They're expensive, so. Justify the $73 I spend on this. But I'm just, I cannot wait. Project Hail Mary. It's just so full of optimism and hope.
1:12.1	It's an incredible book if you're not interested in seeing the movie. So I'm going to cry a lot, Megan. Do you promise me you won't get the ick? No, from you crying at Project Helmary, that's the best. This is a thing on the internet where men say their wives see them cry, like, about something in that manner, and then they get the ick forever. No, no. I mean, we survived. Our relationship survived that horrible stomach virus, and nothing from here on out can be the same ick. You didn't even give me the ick in that. There is a plot point in Project Helmary about this thing called Astrophage. It's not giving anything away.
1:49.8	And you said right before we started recording, I was saying how beautiful you looked and maybe we should role play.
1:50.8	You're like, you can eat my Astrofage.
1:54.0	I did say that.
1:55.5	That is so embarrassing in this context.
1:58.0	It's so perfect.
1:59.4	Actually, maybe the feed should sell astrophage.
2:01.6	Oh.
2:02.0	It's a great energy source.
2:03.6	And we have the tagline on me.
2:05.1	Yeah.
2:06.0	At the feed.com slash swap, eat my astrophage.
2:08.9	25% off.
2:10.1	Yeah.
2:10.4	Okay.
2:10.6	We have the best episode for you today.
2:11.9	We're going to start by talking about fueling for performance.
2:14.4	No eating ass involved there.
2:16.2	Or it could be if you want. A wild new study on
	...

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