4.6 • 7.3K Ratings
🗓️ 30 May 2019
⏱️ 61 minutes
🧾️ Download transcript
In this episode of Bulletproof Radio, Dave welcomes Scott Carney, an award-winning investigative journalist and anthropologist whose reporting has taken him to some of the most dangerous and unlikely corners of the world. He’s also a New York Times bestselling author “What Doesn’t Kill Us: How Freezing Water, Extreme Altitude, and Environmental Conditioning Will Renew Our Lost Evolutionary Strength.” This book traces our evolutionary journey back to a time when survival depended on how well we adapted to the environment around us.
Scott has spent time with some of the most extreme people on Earth who do the most extreme things, such as controller of the cold, Wim Hof; legendary big-wave surfer Laird Hamilton, and HIIT creator Brian Mackenzie.
“As a journalist, you have a couple of options for how you cover someone,” Scott says. “You can go in there and sit back and say, "Okay, I will watch you from a distance. I will watch you breathing or whatever, and I will write an article about that," or you can jump in and give it an experience.”
That pique’s Dave interest more than a little, as he notes Scott’s curiosity and “willingness to go to the ends of the earth to figure out cool stuff.” Scott’s curiosity gets a boost from learning “neural grammar,” which allows better control of the parasympathetic nervous system. Because our system craves homeostasis, he says, it’s going to find it naturally because of the environmental stimulus to which you’re being exposed.
Listen in on this conversation about human endurance, why effortless comfort is hindering our health and how “the wedge” can flip your neurological script.
See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.
Click on a timestamp to play from that location
0:00.0 | You're listening to Bulletproof Radio with Dave Asprey. |
0:16.2 | Today's cool fact of the day is that endurance training doesn't leave any memory in your |
0:21.2 | muscles. |
0:22.2 | Turns out that your muscles don't have long-term memory for exercises like running, biking, |
0:26.2 | or swimming. |
0:27.7 | But old adage that once you've been in shape, it's easier to get fit again, is probably |
0:32.0 | a myth at least for endurance athletes. |
0:35.3 | Relatively small study conducted in my wife's home country of Sweden in 2016 showed that |
0:40.6 | when muscles take a break, they really don't maintain muscle memory from prior exercise. |
0:46.6 | In the report, people trained one of their legs four times a week for three months, and |
0:51.1 | then they took nine months off. |
0:52.7 | And study authors took skeletal muscle biopsies out from both legs before and after and found |
0:58.5 | the cells in the muscles expressed over 3,000 genes in different ways after the exercise. |
1:04.5 | But after they had their fitness hiatus, the scientists couldn't detect any exercises |
1:09.0 | related to genetic changes between the people trained and untrained, at least the people's |
1:13.2 | legs that were trained and untrained. |
1:15.7 | And the study author Malin Lindholm of the Carolenska Institute, where my wife also studied, |
1:21.6 | says, we couldn't see any differences at the gene activity level. |
1:26.1 | Most effects are lost by a month or two of no training. |
1:30.2 | And some study participants next trained both legs and they had similar results, but all |
1:35.1 | study participants grew lots of hair in their legs. |
1:37.7 | Okay, that last part I just made up. |
... |
Please login to see the full transcript.
Disclaimer: The podcast and artwork embedded on this page are from Dave Asprey, and are the property of its owner and not affiliated with or endorsed by Tapesearch.
Generated transcripts are the property of Dave Asprey and are distributed freely under the Fair Use doctrine. Transcripts generated by Tapesearch are not guaranteed to be accurate.
Copyright © Tapesearch 2025.