Dr. Stacy Sims

Yes. Because shivering is an automatic... a response for survival because when we're shivering, we're increasing metabolic heat. So we're able to keep our core temperature elevated so we don't die. And it's a strong response that the body has to cold. For women, when we're vasoconstricting and we're trying to hold heat in,

we don't have the capacity because water on the cold skin is pulling out the heat so fast that the body's just getting colder and colder and colder. And we won't really start shivering when it's that cold. So when we're looking at, like, if you get in the ice, it's way colder than if you get into a plunge pool that's cold.

we don't have the capacity because water on the cold skin is pulling out the heat so fast that the body's just getting colder and colder and colder. And we won't really start shivering when it's that cold. So when we're looking at, like, if you get in the ice, it's way colder than if you get into a plunge pool that's cold.

we don't have the capacity because water on the cold skin is pulling out the heat so fast that the body's just getting colder and colder and colder. And we won't really start shivering when it's that cold. So when we're looking at, like, if you get in the ice, it's way colder than if you get into a plunge pool that's cold.

So if we have four degrees plunge pool, four degrees Celsius, so that's about 38 degrees Fahrenheit, and you sit there in a little microclimate and you don't move at all, you'll create a warm bubble around you and then you might start to shiver.

So if we have four degrees plunge pool, four degrees Celsius, so that's about 38 degrees Fahrenheit, and you sit there in a little microclimate and you don't move at all, you'll create a warm bubble around you and then you might start to shiver.

So if we have four degrees plunge pool, four degrees Celsius, so that's about 38 degrees Fahrenheit, and you sit there in a little microclimate and you don't move at all, you'll create a warm bubble around you and then you might start to shiver.

So that's what we say if you fall through the ice and you're trying to swim, it's like, no, just try to bob there to keep this warm microclimate around you. So if you get in cool water and you don't move, then you might start shivering. But for the most part, that doesn't happen. So for women, let's look at a little bit warmer so we get the same kind of responses and adaptations that men have.

So that's what we say if you fall through the ice and you're trying to swim, it's like, no, just try to bob there to keep this warm microclimate around you. So if you get in cool water and you don't move, then you might start shivering. But for the most part, that doesn't happen. So for women, let's look at a little bit warmer so we get the same kind of responses and adaptations that men have.

So that's what we say if you fall through the ice and you're trying to swim, it's like, no, just try to bob there to keep this warm microclimate around you. So if you get in cool water and you don't move, then you might start shivering. But for the most part, that doesn't happen. So for women, let's look at a little bit warmer so we get the same kind of responses and adaptations that men have.

So when we look at a cold plunge, the whole idea again is environmental stress. So we start to see an improvement in our parasympathetic sympathetic drive. So now we're able to get into that calming phase. Because again, body becoming resilient to stress. We have an increase in our body's capacity for using glucose. So we have better insulin sensitivity, better blood glucose control.

So when we look at a cold plunge, the whole idea again is environmental stress. So we start to see an improvement in our parasympathetic sympathetic drive. So now we're able to get into that calming phase. Because again, body becoming resilient to stress. We have an increase in our body's capacity for using glucose. So we have better insulin sensitivity, better blood glucose control.

So when we look at a cold plunge, the whole idea again is environmental stress. So we start to see an improvement in our parasympathetic sympathetic drive. So now we're able to get into that calming phase. Because again, body becoming resilient to stress. We have an increase in our body's capacity for using glucose. So we have better insulin sensitivity, better blood glucose control.

We have some signals to lose some of that deep body fat. And we start to see better cardiovascular responses, but women do better in the heat. Okay. Talk to me about this. Okay. So when we look at sauna exposure, women can tolerate heat a lot more than men. So if we get into a sauna that is 80 degrees or 60 degrees Celsius, so that's on the upwards of 50%. Gosh, metric math. Hold on.

We have some signals to lose some of that deep body fat. And we start to see better cardiovascular responses, but women do better in the heat. Okay. Talk to me about this. Okay. So when we look at sauna exposure, women can tolerate heat a lot more than men. So if we get into a sauna that is 80 degrees or 60 degrees Celsius, so that's on the upwards of 50%. Gosh, metric math. Hold on.

We have some signals to lose some of that deep body fat. And we start to see better cardiovascular responses, but women do better in the heat. Okay. Talk to me about this. Okay. So when we look at sauna exposure, women can tolerate heat a lot more than men. So if we get into a sauna that is 80 degrees or 60 degrees Celsius, so that's on the upwards of 50%. Gosh, metric math. Hold on.

And science.

And science.

And science.

Science is Celsius. 130 degrees. Okay. We'll go with that. A woman can sit in there, sit up high, 20 minutes or so, not sweating yet. right? Absorbing heat, vasodilate, it's great. So we're heating ourselves. Our body's responding to it by what we call heat shock protein responses. So these little proteins that will uncouple and then recouple and be better for it.