Dr. Matthew Walker

When I get out the bath, all of the blood at the surface of the skin radiates the heat very quickly and my core body temperature absolutely plummets. And temperature and sleep is not quite as simple as we've been led to believe. It's a three-part equation. You have to warm up to cool down to fall asleep. You have to stay cool to stay asleep. You have to then warm up to wake up.

When I get out the bath, all of the blood at the surface of the skin radiates the heat very quickly and my core body temperature absolutely plummets. And temperature and sleep is not quite as simple as we've been led to believe. It's a three-part equation. You have to warm up to cool down to fall asleep. You have to stay cool to stay asleep. You have to then warm up to wake up.

And the first part seems oxymoronic. How can you warm up to cool down to fall asleep? Just as we've said, warm up the surface of the skin to radiate heat, to get cold at your core, and that promotes sleep onset. Then the cooler you get at night, and that's the reason that these smart mattresses now are working so well, As you get cold. Like they ate sleep. They ate sleep, yeah.

And the first part seems oxymoronic. How can you warm up to cool down to fall asleep? Just as we've said, warm up the surface of the skin to radiate heat, to get cold at your core, and that promotes sleep onset. Then the cooler you get at night, and that's the reason that these smart mattresses now are working so well, As you get cold. Like they ate sleep. They ate sleep, yeah.

And the first part seems oxymoronic. How can you warm up to cool down to fall asleep? Just as we've said, warm up the surface of the skin to radiate heat, to get cold at your core, and that promotes sleep onset. Then the cooler you get at night, and that's the reason that these smart mattresses now are working so well, As you get cold. Like they ate sleep. They ate sleep, yeah.

I've recently, together with Andrew Huberman and my good friend, Pete Rottier, we joined the company because I've been using it for so long. And everyone I speak to, all of my sort of concierge clients, they all say it really radically changed life for them. So I thought, if I can help them, I'd love to help join them.

I've recently, together with Andrew Huberman and my good friend, Pete Rottier, we joined the company because I've been using it for so long. And everyone I speak to, all of my sort of concierge clients, they all say it really radically changed life for them. So I thought, if I can help them, I'd love to help join them.

I've recently, together with Andrew Huberman and my good friend, Pete Rottier, we joined the company because I've been using it for so long. And everyone I speak to, all of my sort of concierge clients, they all say it really radically changed life for them. So I thought, if I can help them, I'd love to help join them.

But if you switch on the AI agent, it will gradually learn where your thermal sweet spot is. So as you get colder during the night, you get more deep sleep. But then you have to reverse engineer the trick. You have to warm up to wake up. And it's not light that wakes us up. Really, it's the warming of our core brain and body that is the true force that wakes us up.

But if you switch on the AI agent, it will gradually learn where your thermal sweet spot is. So as you get colder during the night, you get more deep sleep. But then you have to reverse engineer the trick. You have to warm up to wake up. And it's not light that wakes us up. Really, it's the warming of our core brain and body that is the true force that wakes us up.

But if you switch on the AI agent, it will gradually learn where your thermal sweet spot is. So as you get colder during the night, you get more deep sleep. But then you have to reverse engineer the trick. You have to warm up to wake up. And it's not light that wakes us up. Really, it's the warming of our core brain and body that is the true force that wakes us up.

Case in point, when you, you know, let's say you come through in the morning and your significant other is there and they look at you and you say, I know I left the dishes in the sink. I'm so sorry, but just give me two minutes. I just need a couple of mouthfuls of my hot coffee and then I'll be right with you. And within five minutes, you feel like a much better version of yourself.

Case in point, when you, you know, let's say you come through in the morning and your significant other is there and they look at you and you say, I know I left the dishes in the sink. I'm so sorry, but just give me two minutes. I just need a couple of mouthfuls of my hot coffee and then I'll be right with you. And within five minutes, you feel like a much better version of yourself.

Case in point, when you, you know, let's say you come through in the morning and your significant other is there and they look at you and you say, I know I left the dishes in the sink. I'm so sorry, but just give me two minutes. I just need a couple of mouthfuls of my hot coffee and then I'll be right with you. And within five minutes, you feel like a much better version of yourself.

It's got nothing to do with the caffeine. Why? Plasma peak concentration of caffeine isn't going to hit you until about 15 or 17 minutes later. What is it? It's the warmth. It's the warmth. And that much more rapidly rises your core temperature. And that's where you get a first hit after the warm beverage in the morning. And then the caffeine kicks in, so you get a second benefit.

It's got nothing to do with the caffeine. Why? Plasma peak concentration of caffeine isn't going to hit you until about 15 or 17 minutes later. What is it? It's the warmth. It's the warmth. And that much more rapidly rises your core temperature. And that's where you get a first hit after the warm beverage in the morning. And then the caffeine kicks in, so you get a second benefit.

It's got nothing to do with the caffeine. Why? Plasma peak concentration of caffeine isn't going to hit you until about 15 or 17 minutes later. What is it? It's the warmth. It's the warmth. And that much more rapidly rises your core temperature. And that's where you get a first hit after the warm beverage in the morning. And then the caffeine kicks in, so you get a second benefit.

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