Benefits of Sauna & Deliberate Heat Exposure | Huberman Lab Essentials
In a Nutshell
Deliberate heat exposure via sauna (80-100°C, 5-20 min/session) reduces cardiovascular mortality by up to 50% with 4-7 sessions/week, lowers cortisol, boosts heat shock proteins and FOXO3 for longevity, and enhances mood by upregulating endorphin pathways through dynorphin release. For maximum 16-fold growth hormone spikes, limit to rare intense protocols (e.g., 4x30 min once weekly); regular use adapts and diminishes this effect. Hydrate with electrolytes post-session, time evening for sleep benefits via post-heat cooling, and start conservatively to avoid hyperthermia.
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Welcome to Huberman Lab Essentials, where we revisit past episodes for the most potent and actionable science-based tools for mental health, physical health, and performance. Andrew Huberman is a professor of neurobiology and ophthalmology at Stanford School of Medicine. Today we are talking about the science of heat. Heat is a remarkable stimulus, meaning when we are in a hot environment, it has a profound effect on our biology. We're going to talk about the science of heat and heating both in terms of their mechanisms and tools related to the use of heat things like sauna, how often to do sauna, how long to be in the sauna, how hot to be in the sauna for particular goals and outcomes.
Heat up two ways: from the outside, meaning the things that we come into contact with, the clothing that we put on our body, whether or not there's heat in the room or whether or not it's cold outside or cold in a room. And we heat up from the inside. At every point across your entire lifespan, you have two distinct temperatures. One is the temperature on your skin, what scientists call your shell, and the temperature of your core, your viscera, meaning your organs, your nervous system, and your spinal cord. It is vitally important to understand that you have those two temperatures, and that your brain is constantly sending out signals to your body as to whether or not it should heat up or cool down depending on the temperature of the shell.
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