How often should I use a sauna for health benefits?

For cardiovascular and longevity benefits, using the sauna 4-7 times per week shows the most significant risk reduction. For growth hormone release, less frequent use (once a week or less) is more effective due to the 'shock' effect.

What is the optimal temperature and duration for a sauna session?

Sauna temperatures generally range from 80°C to 100°C (176°F to 212°F). Session durations are typically between 5 to 20 minutes. Start with lower temperatures and shorter durations if you are new to it.

Can I get sauna benefits without a traditional sauna?

Yes, the key is to raise your core and shell body temperature. Alternatives include hot tubs, hot water baths, or even wearing extra clothing during exercise in warm conditions. The goal is to induce a heat stress response.

How does sauna affect stress and mood?

Heat exposure can activate pathways involving dynorphins, which initially cause discomfort but paradoxically lead to increased efficiency of feel-good endorphins over time, improving baseline mood and response to positive events.

When is the best time of day to use a sauna?

For most people, using the sauna later in the day or just before sleep is beneficial for sleep due to the post-sauna body cooling effect. This timing can also optimize growth hormone release, especially if done before bed and in a fasted state.

What are heat shock proteins and why are they important?

Heat shock proteins are protective molecules activated by heat. They help repair and prevent damage to proteins within cells, contributing to overall health, longevity, and protection against various forms of mortality.

Benefits of Sauna & Deliberate Heat Exposure | Huberman Lab Essentials

Andrew Huberman

Science & Technology3 min read40 min video

Mar 12, 2026|4,219 views|315|37

andrew huberman huberman lab podcast huberman podcast dr. andrew huberman neuroscience huberman lab andrew huberman podcast the huberman lab podcast science podcast heat exposure sauna

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Key Moments

TL;DR

Deliberate heat exposure, like saunas, offers significant physical & mental health benefits. Protocols vary by goal.

Key Insights

Regular sauna use (2-7 times/week) is linked to reduced cardiovascular mortality and all-cause mortality.

Heat exposure activates heat shock proteins, aids DNA repair via FOXO3, and can increase growth hormone.

Sauna use can decrease cortisol levels, a marker of stress.

Mental health benefits are linked to dynorphin release, which upregulates feel-good endorphin pathways.

Optimal sauna temperatures are 80-100°C (176-212°F) for 5-20 minutes per session for health benefits.

For maximum growth hormone, use heat exposure infrequently (max 1/week) with multiple sessions per exposure day; for cardiovascular/longevity benefits, use it frequently (2-7 times/week).

UNDERSTANDING THE BODY'S THERMOREGULATION CIRCUIT

The body maintains distinct shell (skin) and core temperatures, regulated by a neural circuit. Neurons in the skin sense heat and signal the spinal cord, which relays this information to brain areas like the lateral parabrachial nucleus and the preoptic area (POA) in the hypothalamus. The POA then orchestrates physiological responses such as sweating and vasodilation to either heat up or cool down the body, and influences behavior to seek or avoid thermal extremes.

CARDIOVASCULAR AND LONGEVITY BENEFITS OF REGULAR HEAT EXPOSURE

Studies, such as one in BMC Medicine involving over 1,600 participants, show a strong correlation between frequent sauna use (2-7 times per week) and reduced cardiovascular mortality, stroke, and all-cause mortality. These benefits are observed even after accounting for confounding factors like smoking and exercise habits, suggesting that regular heat exposure itself plays a significant role in promoting longevity.

MECHANISMS BEHIND HEAT'S PHYSIOLOGICAL IMPACTS

Deliberate heat exposure mimics moderate cardiovascular exercise, increasing heart rate, blood plasma volume, and stroke volume. It also triggers hormonal shifts, notably a significant decrease in cortisol, which is beneficial for stress management. Furthermore, heat activates heat shock proteins (HSPs) that protect cells from protein misfolding and promotes DNA repair pathways through the molecule FOXO3, which is linked to longevity.

GROWTH HORMONE AND NEUROTRANSMITTER EFFECTS

While regular heat exposure can increase growth hormone, the most dramatic increases are seen with infrequent, intense sessions. A protocol of 2 hours of sauna daily for one week led to a 16-fold increase in growth hormone on the first day, diminishing over subsequent uses. For mood enhancement, heat exposure leads to the release of dynorphins, which, through a feedback loop, increase the efficiency and baseline levels of feel-good endorphins.

OPTIMIZING SAUNA PROTOCOLS FOR SPECIFIC GOALS

Sauna protocols should be tailored to individual goals. For cardiovascular and longevity benefits, frequent use (2-7 times per week) at 80-100°C (176-212°F) for 5-20 minutes per session is recommended. For significant growth hormone increases, less frequent exposure (e.g., once a week or even less) with multiple, longer sessions that day is suggested to prevent adaptation. Mental health benefits are gained from experiencing mild discomfort, indicating pathways are being activated.

PRACTICAL CONSIDERATIONS FOR HEAT EXPOSURE

Saunas are convenient, but alternatives like hot tubs, steam rooms, or even wearing extra clothing and exercising in heat can provide similar benefits by raising core body temperature. It's crucial to stay hydrated, consuming at least 16 ounces of water per 10 minutes of sauna use. For sleep benefits, performing heat exposure in the later part of the day, followed by a warm shower, can facilitate falling asleep due to subsequent cooling.

Mentioned in This Episode

●Organizations

●Studies Cited

●Concepts

●People Referenced

Sauna & Heat Exposure Protocols for Health & Performance

Practical takeaways from this episode

Do This

Use sauna for 5-20 minutes per session.

Sauna temperatures between 80°C (176°F) and 100°C (212°F).

For cardiovascular and longevity benefits, use sauna 4-7 times per week.

To increase growth hormone, use sauna infrequently (e.g., once per week or less) with multiple sessions per exposure.

For mood and mental health benefits, allow for some discomfort to activate pathways.

If optimizing for sleep, do sauna later in the day, especially before bed.

Hydrate adequately after sauna, aiming for at least 16 ounces of water per 10 minutes in the sauna.

To maximize growth hormone release, consider doing sauna fasted or at least 2-3 hours after a meal.

Avoid This

Do not overheat to the point of heat stroke.

Avoid doing intense heat exposure too frequently if aiming for maximum growth hormone response, as adaptation diminishes effects.

Avoid high blood glucose and insulin levels when aiming to maximize growth hormone release from sauna.

Do not do intense heat exposure immediately before sleep if it negatively affects your sleep onset (though for many it can help).

Cardiovascular Event Risk Reduction from Sauna Frequency

Data extracted from this episode

Frequency (per week)	Reduced Cardiovascular Event Risk vs. Once/week
2-3 times	27%
4-7 times	50%

Growth Hormone Increase Fold Change in 1986 Study

Data extracted from this episode

Sauna Protocol	Day 1 Fold Increase	Day 3 Fold Increase	Day 7 Fold Increase
2 hours total (4x 30 min sessions) at 80°C	16-fold	3-4-fold	2-3-fold

Common Questions

Regular sauna use is associated with reduced cardiovascular mortality, improved mood, and potential increases in growth hormone. It mimics some effects of cardiovascular exercise and activates protective cellular mechanisms.

Topics

Longevity Health & Longevity Neuroscience & the Brain Mindset & Self-Improvement Cardiovascular Health Sauna Benefits Stress Reduction Growth Hormone Heat Exposure Cellular Repair Mood Enhancement

Mentioned in this video

studyendocrine effects of repeated hot thermal stress and cold water immersion in young adult men

A 2021 study investigating the hormonal effects of heat exposure and cold water immersion in men, noting a significant decrease in cortisol output.

conceptEndorphins

Molecules naturally produced in the brain and body that act as pain relievers and can induce mild euphoria, often released in response to stressors.

conceptmu opioid receptor

Receptors to which certain endorphins bind, mediating pain relief and feelings of mild euphoria.

personAndrew Huberman

Host of Huberman Lab Essentials, professor of neurobiology and ophthalmology at Stanford School of Medicine, discussing the science of heat exposure.

conceptTRIP channels

Receptors in nerve cells within the skin that sense changes in heat.

conceptAmygdala

Brain region involved in processing emotions and can be activated by the preoptic area, influencing behavior like wanting to move out of a hot environment.

organizationBMC medicine

A medical journal where a significant study on sauna bathing and cardiovascular mortality was published.

conceptHeat Shock Proteins (HSPs)

Protective proteins activated by heat exposure that help rescue and prevent misfolding of other proteins in the brain and body.

conceptFOX03

A molecule involved in DNA repair pathways and clearing senescent cells, which can be upregulated by deliberate heat exposure like sauna use.

supplementdynorphin

A type of endorphin that can make us feel worse in response to stressors by binding to the kappa receptor, but paradoxically increases the efficiency of feel-good endorphins over time.

studySauna bathing is associated with reduced cardiovascular mortality and improves risk prediction in men and women, a prospective cohort study

A 2018 study published in BMC Medicine that examined the association between sauna bathing frequency and cardiovascular mortality, finding increased frequency correlated with reduced risk.

studyendocrine effects of repeated sauna bathing

A 1986 study that observed significant increases in growth hormone after prolonged sauna sessions.

conceptkappa receptor

A receptor that binds to dynorphin, triggering pathways that lead to agitation, stress, and a general sense of pain, but is also involved in the downstream upregulation of feel-good endorphins.

conceptPreoptic Area (POA)

A key area in the hypothalamus of the brain responsible for regulating body temperature and behavior related to heating up or cooling down.