 Question is from Kim and Lexi Adventures. Can you explain why fit people have a lower resting heart rate and why it's important? It's a muscle. You made it stronger by exercising it. You're just more efficient. Your body is utilizing the blood that it's pumping more efficiently, so your heart doesn't need to pump as much. Your heart is also pumping more effectively, so more blood. That's the goal of the body. You know, there's some people that theorize that we are all born with a maximum time that our heart will beat, like 100 trillion times. Oh, it only has, like, an excellent amount of beats. Chinese medicine. Right, yeah. There's people that theorize that each of us were born with this. You've got 100 trillion beats, whatever. I'm just saying that for a hypothetical reason. That's why I always call it the ticker. And by you strengthening your heart, because it's a muscle, you can build it just like you could build the biceps and exercise it. And what Zhao means by efficient, it just takes less pumps Let's say when you're unhealthy, your heart rate takes 60 pumps in a minute to circulate blood through the body. Well, if it's a really strong heart, it no longer takes 60. It takes 50 or 40. Well, 60 would be low to begin with. If you're unfit, you're probably out of that. Right, yeah, those are terrible numbers I'm using. But to get the point across is that you use X amount per minute, whatever you start with. The more you train it, the more efficient it becomes. And that really matters over time. It's less that muscle has to work throughout the entire day. You may be, and you may think, well, that's weird. You elevate it till when you exercise. Well, yeah, you elevate it for an hour. It's a stress that causes an adaptation that makes it more efficient and makes it stronger. And then the rest of the time you're alive, your body's more efficient with its utilization of blood and the oxygen and nutrients that are in blood. So when you add a shape and you go up a flight of stairs and your heart beating, it's because your body ain't utilizing oxygen and blood very well. It needs to pump more and more. Yeah, it's crazy. I was training cyclists and a couple of marathon runners and to try and stress them out and to try and get their heart rate to exceed whatever max output they had previously was really difficult. They were so efficient at bringing that level down. Even once it rose up high, it came right back down. And so that's, I mean, the more you train it, the more effective it gets. That's a very good point right there. That's another benefit that you get from training the heart really well is the recovery time, right? So like Sal talked about, walked up going, like a person who's decondition, right? And we'll use better numbers now, like 75 or 80 beats per minute, their heart beats right now. They go upstairs and it elevates to 120 and then for the next hard to get it down, the next 20 minutes, it's still above 100 because oh my God, the flight of stairs, whoo, that was a lot. And the heart's still pumping. The person who's really conditioned, well, first of all, they're already starting at 45 or 50 beats. They go up to stairs, it only goes up to like 80 and then it recovers right back down within minutes. And then when you think about it over decades of your lifetime, you now have saved so many pumps. If you think of your heart like an engine, like it's less miles that you're putting on that heart over time and that's where I meant that, I know there's some people that theorize that you only get X amount of beats in your entire lifetime. One of the best ways to get that number to come down overall is by strengthening it so it doesn't have to be. And that's mainly a Chinese, I believe it's Chinese medicine that says, I know Western medicine, I don't know of any studies that support that, but Chinese medicine does say that specific thing that you just said, Adam, have you guys ever worked with deep divers who don't use like equipment or whatever? Okay, so I've trained a couple divers who, that's what they do, they do competitions where they don't wear- Hold their breath for like four minutes. Yeah, they don't, abalone divers do this. Yeah, so they don't wear oxygen, it's just the fricking snorkel and they go and dive the slowest heart rates you've ever measured in your entire life. And as they're diving and holding their breath, their heart rate just, just slows way, way down and it's the most efficient thing I've ever seen on a human being. I actually had somebody I trained years ago who competed that way and he was able to get his, he was like, his heart beat got so slow, it was like a fricking dolphin, like it wasn't even, it was beating like, I don't remember, it was like something ridiculous, super low number. Pretty amazing to be able to do that. Now, what are the benefits of that? Well, shit, man. You wanna talk about stamina, being able to maintain a nice moderate level of intensity for long periods of time. You know, that has its own health benefits. Achieving that state of calm. Yeah, but at the end of the day, like to answer this question, it's just, you're just more efficient. It's like, you know, you're gonna use less energy doing something that you're good at than you will doing something you're not good at. And if you're not good at moving your body, your body is very inefficient at using energy, it's gonna use a lot more of it.