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Some Work, All Play

301. What To Do Pre-Race, How Metabolism Works For Athletes, Training Races, Colon Health for Runners, and a Great US Half Marathon Update!

Some Work, All Play

David Roche and Megan Roche

Running, Sports

4.82.1K Ratings

🗓️ 10 March 2026

⏱️ 101 minutes

🧾️ Download transcript

Summary

We stocked up on neck floaties before this great episode! The main topic was a discussion of the constrained total energy expenditure model, which argues that physical activity will often have a smaller impact on energy expenditure than predicted. We do an interdisciplinary zoom-out to talk about how it relates to the research on low energy availability and within-day deficits. The conclusion: fueling the fire is key to prevent the fire from going cold.

We also have an exciting update from the US Half Marathon Champs! People always deserve love and compassion. But systems respond to pressure.

And this one was full of amazing topics! Other topics: our hot tub experiment continues (DO NOT DO THIS), strange nervous system responses to uphill treadmill workouts, the Canyons 100k, why we love the LA Marathon giving an option to stop at 18 miles and receive a finisher’s medal, a rant about people who are angry about “participation trophies,” what runners can learn from cyclists about pre-race training, colon health for runners, training race timing and approach, worries about outdoor risks when running, and lots more.

Let’s stock up on some big boss meals and GET SOME. We love you all! HUZZAH!

-David and Megan

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Transcript

Click on a timestamp to play from that location

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 getting our floaties on on this Tuesday. Do you know what that's referring to? Oh my gosh. I know very, very well. I saw your Amazon Prime. You're looking at those kids, donut shaped floaties. And then I did the math and I was like, I know where this is going. Okay. Not only is it kids floaties, it's kids' neck floaties. If you put around your neck so that theoretically,

0:24.1

if I pass out in the hospital, And then I did the math and I was like, I know where this is going. Okay. Not only is it kids' floaties, it's kids' neck floaties.

0:22.0

They put around your neck so that theoretically, if I pass out in the hot tub, my head won't go under water. Do you think the floaty is strong enough? Because you've got like a 99th percentile head. Your head barely fits in hats or bucket hats. Do you think it's going to overpower the floaty? I think it's going to go around my neck.

0:36.7

So unless my neck is also that size,

0:38.4

and I feel like kids sometimes have quite large neck.

0:41.3

So. Do you think it's going to overpower the floaty? I think it's going to go around my neck. So unless my neck is also that size, and I feel like kids sometimes have quite large neck. So I'm probably a 99th percentile two-year-old is very similar to me when it comes to neck size. True, but I feel like we need to run some tests on this first before we truly put it into action. I don't think I should trust it. I think my general plan should be not to pass out in the hot tub. But where this comes from is last week on the Patreon bonus episode,

0:58.8

we were talking about a method we used to get our hot tub hotter. So hot tubs in the U.S. at least

1:04.0

are capped at 104 degrees Fahrenheit or 40 degrees Celsius. And we have seen in the research that

1:09.2

often they go up to 41 or 42. And because we're so research-driven and because I like my hot tub time, we've been on a quest to figure out different methods to do this. I initially bought something where you would just submerge it in the hot tub and get it hotter and heard from a number of listeners, don't do that. That sometimes electrocutes horses. Yeah, and you did not electrocute yourself in this process. I'm impressed. This is theoretically a safe way to do it. We're not going to talk about how. Probably not our place. And so I've been using it. It seems to work very well. It's about four degrees hotter. So that's kind of interesting. So it's set at 104, but truly it's 108. But I don't let it get that hot. To be clear, it's just putting it a little bit over the temperature. So you're at 107? No, no. Do you know, do you even have a matter? I'm trying to be vague. We got to be safe with it. No one out there do this. You might die. Like, please, there's a reason that it's capped at 104. But, you know, to go on with the research, you want to do this. But as I thought about it, I'm like, well, in all those research studies, people aren't doing this at home. They're doing it with researchers next to them with a number of different safety mechanisms. They have fans on them. They have cooling devices. Yeah, which makes it a lot easier, actually. I monitor my hurry and I'm being safe, but you never know. And that would be the most tragic and honestly deserved method to go out would be just passing out in the hot tub while I'm trying to do a dumb version of heat training. Well, I was just going to devote computer time to being outside and sitting next to you. It's working alongside you, but it's been cold here. So I would have to do that in the snow in a puppy coat. And I feel like that's just not entirely realistic. So neck floaties are where it's at. That's my solution. And interestingly, this morning while we were searching another study we're going to talk about, happened to find a study I hadn't heard that was trying to simulate injuries in athletes. So it would essentially electrocute their muscles. Kind of cool, actually. I wonder what the IRB was, the athlete signed to be like, we're just going to simulate injury in you. I think this study was done in Spain. I don't think it was a U.S. based study, maybe slightly different protocols. And they, after that, did water immersion and cold temperatures, room temperature, and hot water immersion. Hot water immersion got all the way to 42C, so quite hot. And the hot water immersion group had less indicators of muscle damage afterward and higher rates of healing in the way the study was looking at it. And that's not the details of the study. But... You're like, I'm going to put this on the aftermath form. You're like, there was a reason behind this.

3:25.2

So yeah, yeah, exactly. On the tombstone, it will say for science. Not putting on a life insurance, though. Oh, gosh. Maybe we shouldn't have talked about that. Don't do this. Please don't. Please don't. I'm trying to be as safe as I possibly can. But, you know, as I was searching for the studies,

3:42.8

interestingly, an article I wrote in 2020 came up that said, science says, take hot baths.

3:48.5

So I've always been ahead of the science, Megan. Yeah, you're going to have to put some citations

3:52.1

on that grave. It's going to be like four science, 14 comma 15. Look at these two studies.

4:15.1

Maybe though, you've come back really fast. Yeah. Like from your foot stuff. Not from the grave. Not from the grave. Yeah, that would be truly impressive. Do you think it's worth it? Do I think it's worth it? No, no, because I was also doing cooler hot tub at that time. I do think hot water immersion is helpful. The question is, what are the limits? And I don't want to be the one that pushes it. I've only been staying in 15 minutes,

4:18.3

and I'm not going to push it beyond that. You've been staying in 15 minutes and your heart rate got up to 125, 118. No, no, no. That's when I get out when it's more reactive. So when I'm in there, it stays around 110, which is safety zone.

4:28.5

Pretty high, though.

4:29.1

But if I stayed in for 30 minutes, like I was doing at lower temperatures, I actually would be unsafe.

4:33.2

Whereas some of the study protocols... around 110, which is safety zone. Pretty high, though. But if I stayed in for 30 minutes, like I was doing at lower temperatures, I actually would be unsafe.

4:33.2

Whereas some of the study protocols, they're staying in for how long?

4:36.2

Like 40 minutes?

4:37.0

40 minutes.

4:37.6

So I think I'm safe.

...

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