Dr. Peter Attia

So 0.7677 is pretty darn good. His lactate hit about 2 millimole, and he achieved this running at 7.3 miles per hour. So again, there's a lot to unpack in there, but that gives us a pretty good sense of his level of fitness. And for a guy in his 20s, that's really good fitness.

So 0.7677 is pretty darn good. His lactate hit about 2 millimole, and he achieved this running at 7.3 miles per hour. So again, there's a lot to unpack in there, but that gives us a pretty good sense of his level of fitness. And for a guy in his 20s, that's really good fitness.

Yes, yeah. But even this test is about – we normally would separate these two tests on two separate days. Okay. So people who come to 10 Squared are not from Austin. They're from all over the place. So they come in for two days of testing, and you've got to sort of figure out a way to take a person who's not necessarily that fit and allow them to do these tests.

Yes, yeah. But even this test is about – we normally would separate these two tests on two separate days. Okay. So people who come to 10 Squared are not from Austin. They're from all over the place. So they come in for two days of testing, and you've got to sort of figure out a way to take a person who's not necessarily that fit and allow them to do these tests.

So it's kind of broken up over to a couple days so they can mix it with the strength testing and all the other stuff.

So it's kind of broken up over to a couple days so they can mix it with the strength testing and all the other stuff.

So the truth of the matter is, looking at his stuff here, I would say I think you've got the endurance thing really covered. In his case... There were other issues that were uncovered during his intake that were of more concern. And this is a matter of like now what we think of as portfolio management, right?

So the truth of the matter is, looking at his stuff here, I would say I think you've got the endurance thing really covered. In his case... There were other issues that were uncovered during his intake that were of more concern. And this is a matter of like now what we think of as portfolio management, right?

So when your VO2 max is in the top 2%, when you're fat oxidizing 0.7, you know, almost 0.8 grams per minute, and he's got a heart rate of 165 to 170 when he's in zone two. I mean, this guy's cardio is dialed in.

So when your VO2 max is in the top 2%, when you're fat oxidizing 0.7, you know, almost 0.8 grams per minute, and he's got a heart rate of 165 to 170 when he's in zone two. I mean, this guy's cardio is dialed in.

All right. Well, first off, Jack, thanks for being an awesome guinea pig yesterday. You hit it out of the park as far as your cardio training. So tell me a little bit, like, what are you doing for cardio? How often are you running?

All right. Well, first off, Jack, thanks for being an awesome guinea pig yesterday. You hit it out of the park as far as your cardio training. So tell me a little bit, like, what are you doing for cardio? How often are you running?

Interesting. I know that the team talked to you about your left foot. Yes. And did they show you the pictures on the treadmill?

Interesting. I know that the team talked to you about your left foot. Yes. And did they show you the pictures on the treadmill?

I think it's very likely that the ankle sprain has changed your gait such that you probably are going to develop an injury over time with your running if your pattern is not corrected. So you're overcompensating on the left. And I assume you noticed the difference in the height of your shoulders and your head and everything while you were running.

I think it's very likely that the ankle sprain has changed your gait such that you probably are going to develop an injury over time with your running if your pattern is not corrected. So you're overcompensating on the left. And I assume you noticed the difference in the height of your shoulders and your head and everything while you were running.

So even though the engine is working insanely well, this test only measures the performance of your engine. Your chassis, which is a subjective assessment to use the car analogy, shows that the chassis is a bit weak.

So even though the engine is working insanely well, this test only measures the performance of your engine. Your chassis, which is a subjective assessment to use the car analogy, shows that the chassis is a bit weak.

That's right. And again, the good news about running is each step is very light. But if you're running 20K, that's a lot of steps. So even something that's a light impact but done thousands of times will produce a problem. Okay. So let's shift from how well the engine is, which is exceptional at both ends, by the way. To be clear, your peak engine output, which is VO2 max, was awesome.

That's right. And again, the good news about running is each step is very light. But if you're running 20K, that's a lot of steps. So even something that's a light impact but done thousands of times will produce a problem. Okay. So let's shift from how well the engine is, which is exceptional at both ends, by the way. To be clear, your peak engine output, which is VO2 max, was awesome.