Andrew Huberman didn't invent sauna science. The Finns had a few thousand years' head start, and the clinical data has been accumulating since long before anyone had a podcast. What Huberman did, through the Huberman Lab, was synthesise the research into specific, actionable protocols and give the practice a name that stuck: deliberate heat exposure.
That framing matters. It recast the sauna from a post-gym luxury into a distinct physiological intervention with its own dose, frequency, and timing. And once you treat it as a protocol rather than a habit, the question stops being "should I use a sauna?" and starts being "which protocol, and how precisely?"
Here is a complete breakdown of what Huberman actually recommends, the studies behind each protocol, and how to implement them.
The short answer: Andrew Huberman recommends a minimum of 57 minutes of total sauna time per week, spread across multiple sessions at 80–100°C, for general health benefits. His cardiovascular protocol calls for 4–7 sessions per week at 15–20 minutes each. His growth hormone protocol, 4 x 30-minute rounds at 80°C with cool-downs between, produced a 16-fold increase in GH in one study.
Watch: Huberman on the Benefits of Sauna & Deliberate Heat Exposure
The Minimum Effective Dose: Huberman's General Health Protocol
One hour of total sauna time per week is the floor. Huberman has returned to this number repeatedly, it is the minimum threshold at which meaningful health benefits begin to appear in the literature. The key word is "total." That hour can be divided across two, three, or more sessions, at temperatures between 80°C and 100°C.
The logic rests on a convergence of data around heat shock protein activation, cardiovascular conditioning, and endorphin release. At these temperatures and durations, the body mounts a genuine stress response, core temperature rises, heart rate elevates to 100–150 BPM, and the cascade of protective molecular adaptations begins.
For someone new to deliberate heat exposure, Huberman suggests starting conservatively: sessions of 5–15 minutes, building toward 20 minutes as tolerance develops. The discomfort should be real but manageable. If you can scroll your phone comfortably, the temperature is too low or the duration too short.
This general protocol is the entry point. It is also, for many people, enough. But the data gets considerably more interesting when you increase frequency.
The Cardiovascular Protocol: What the Finnish Data Actually Shows
Four to seven sauna sessions per week, 15–20 minutes each, at 80–100°C. This is the Huberman sauna protocol for cardiovascular health and longevity, drawn directly from the most cited body of sauna research in the world.
The foundation is the Laukkanen et al. prospective cohort study, which tracked over 2,300 Finnish men for more than 20 years. The headline finding: men who used the sauna 4–7 times per week had a 50% lower risk of fatal cardiovascular disease compared to those who used it once per week. They also showed a 40% reduction in all-cause mortality. These are not small effect sizes. These are the kind of numbers that, were they attached to a pharmaceutical, would generate a market cap.
Huberman references this study frequently and frames the cardiovascular protocol around its parameters. The mechanism is straightforward: repeated heat exposure conditions the cardiovascular system in ways that closely mimic moderate aerobic exercise. Cardiac output increases by 60–70% during a session. Blood vessels dilate. Plasma volume expands over time, reducing the heart's workload at rest. Dr. Rhonda Patrick has written extensively on this dose-response relationship, noting that the cardiovascular benefits appear to scale with frequency, the more sessions per week, the stronger the association with reduced mortality.
The practical takeaway from this Andrew Huberman sauna protocol is consistency over heroism. Fifteen minutes at 85°C, done five times a week, will outperform a single 45-minute endurance test on Saturday. The Finnish men in the study weren't athletes performing extreme protocols. They were regular sauna users, showing up often.
For timing relative to exercise, Huberman suggests that cardiovascular-focused sauna sessions can work well post-workout, the body is already warm, heart rate is elevated, and the session layers additional cardiovascular stimulus onto the training adaptation. However, he has also noted that standalone sessions on rest days allow the heat stimulus to operate independently, which may be preferable if you want to optimise your sauna timing around training.
The Growth Hormone Protocol: Huberman's Most Specific Recommendation
Four rounds of 30 minutes at 80°C, with brief cool-down periods between rounds, in a fasted state, ideally in the evening. This is the Huberman heat protocol that generates the most questions, and for good reason. The numbers behind it are striking.
The protocol is based on a study in which participants underwent repeated sauna exposure and experienced a 16-fold increase in growth hormone on the first day. That is not a typo. Sixteen times baseline. The response diminished on subsequent days as the body habituated, by day three, the GH spike was roughly 3-fold, which is why Huberman recommends using this protocol infrequently. Once per week, or even once every ten days, to preserve the acute response.
Duration is not incidental to the mechanism. Duration is the mechanism.
The conditions matter enormously. Huberman is specific about each variable:
This is two hours of total sauna time in a single session. It is not casual. The fasting requirement exists because insulin is a potent suppressor of growth hormone release, eating before the session significantly blunts the spike. The evening timing is designed to stack the acute sauna-induced GH release on top of the body's natural nocturnal growth hormone pulse, which peaks during the first phase of deep sleep.
Huberman has been clear that this is not a daily protocol and should not be layered onto heavy training days. The physiological demand of two hours of heat exposure while fasted is substantial. Trying to bolt it onto the end of a hard training session is a recipe for cutting the protocol short, and an incomplete protocol delivers a fraction of the hormonal response.
Protocol Comparison
Watch: The Full Deep Dive, Episode 69
Huberman's original two-hour breakdown of the science behind deliberate heat exposure, covering every protocol, mechanism, and study referenced above.
Heat Shock Proteins and the Deeper Mechanism
Deliberate heat exposure works, in part, because it is stressful, and the body's response to that stress is protective. Huberman frequently discusses heat shock proteins (HSPs) as a central mechanism behind sauna's benefits. These are molecular chaperones, proteins that activate under thermal stress to repair misfolded proteins, protect cells from damage, and reduce inflammation.
HSP70 and HSP90 are the most studied in the context of sauna use. Their expression increases meaningfully at temperatures above 80°C and durations beyond 15 minutes. The downstream effects include improved cellular resilience, reduced oxidative stress, and enhanced immune function. Huberman frames these as a form of hormesis, the same principle that makes exercise beneficial. The stress is the stimulus. The adaptation is the benefit.
This is also why the "just sit in a warm room" approach falls short. Deliberate heat exposure requires genuine thermal discomfort. The protocols work because they push the body into a state of controlled physiological stress. A sauna set to 60°C for ten minutes is pleasant. It is not a protocol.
Making the Protocols Sustainable
The limiting factor in any sauna protocol is rarely willpower, it is head temperature. Air temperature stratifies sharply inside a sauna. The air at the ceiling can sit 10–15°C hotter than at bench level. Your head, positioned at the highest point, receives the most extreme thermal load. The hypothalamus, the brain's thermostat, reads that disproportionate head temperature and triggers the urge to exit well before your core body has completed the intended exposure.
This is why Huberman's protocols are harder to execute than they appear on paper. Fifteen minutes at 85°C is achievable. Four rounds of 30 minutes at 80°C while fasted is a different proposition entirely. The body can handle it. The head often cannot, or rather, the head's thermal sensitivity forces an early exit before the protocol is complete.
This is where a sauna hat earns its place. Not as an accessory, but as equipment. A merino wool hat insulates the head from the hottest air in the room, keeps the preoptic area from overheating prematurely, and extends the window before the hypothalamus fires the exit signal. Merino breathes and wicks moisture, it manages heat rather than trapping it, which is why it outperforms felt, cotton, and synthetic alternatives in sustained high-temperature environments.
The Ri Sauna Crown is built from 100% Australian merino wool for exactly this purpose. It is designed for the person running Huberman's protocols with intent, not sitting in a warm room, but executing a specific dose of deliberate heat exposure and needing to complete the full duration. If you are following the cardiovascular protocol, it means finishing your 20 minutes rather than bailing at 14. If you are running the growth hormone protocol, it means surviving round four.
The protocol only works if you can complete it. The hat is how you complete it.
Whether you are building toward Huberman's minimum effective dose or chasing the growth hormone spike, the Ri Sauna Quiz, a free tool that matches you to the right protocol based on your goals and experience level. It is the companion to everything on this page.
Frequently Asked Questions
What temperature does Huberman recommend for sauna?
Huberman recommends 80–100°C (176–212°F) for general health and cardiovascular protocols. For the growth hormone protocol specifically, he cites 80°C as the target, hot enough to trigger the hormonal response, but sustainable enough to complete four 30-minute rounds. If you are new to deliberate heat exposure, start at the lower end and build tolerance gradually.
How long should a sauna session be according to Huberman?
For general health, Huberman recommends sessions of 15–20 minutes at 80–100°C. The minimum effective dose is approximately 57 minutes of total sauna time per week, which can be split across multiple sessions. For the growth hormone protocol, each round is 30 minutes, with four rounds per session. Beginners should start at 5–15 minutes and build up.
What is Huberman's growth hormone sauna protocol?
Four rounds of 30 minutes at 80°C, with 5-minute cool-down periods between rounds, performed in a fasted state (2–3 hours since last meal), ideally in the evening. This protocol produced a 16-fold increase in growth hormone in one study. Huberman recommends using it no more than once per week to prevent habituation from blunting the response.
How often should you sauna according to the research?
The strongest evidence comes from the Laukkanen cohort study, which found that men using the sauna 4–7 sessions per week had a 50% lower risk of fatal cardiovascular disease compared to once-weekly users. Huberman frames this as the cardiovascular protocol. For most people, 3–4 sessions per week is a realistic starting point, with consistency across weeks and months mattering more than any individual session.
Should you sauna before or after a workout?
Huberman suggests that cardiovascular-focused sauna sessions can work well post-workout, the body is already warm, heart rate is elevated, and the session layers additional cardiovascular stimulus onto the training adaptation. However, standalone sessions on rest days allow the heat stimulus to operate independently. The growth hormone protocol should not be layered onto heavy training days due to the substantial physiological demand. For a full breakdown, see Sauna Before or After Workout.
Do you need a sauna hat for the Huberman protocol?
You do not strictly need one, but it materially changes whether you can complete the protocol as prescribed. The head heats faster than the body in a sauna due to thermal stratification and the scalp's thin tissue. A wool sauna hat delays the hypothalamic distress response by approximately 5–10 minutes, which is precisely the window where the most significant physiological adaptations occur. For the growth hormone protocol's four 30-minute rounds, head insulation becomes close to essential.
Sources
- Laukkanen JA et al. "Association Between Sauna Bathing and Fatal Cardiovascular and All-Cause Mortality Events." JAMA Internal Medicine, 2015.
- Kukkonen-Harjula K, Kauppinen K. "How the sauna affects the endocrine system." Annals of Clinical Research, 1988.
- Krause M et al. "Heat shock proteins and heat therapy for type 2 diabetes: pros and cons." Current Opinion in Clinical Nutrition and Metabolic Care, 2015.
- Laukkanen JA et al. "Cardiovascular and Other Health Benefits of Sauna Bathing: A Review of the Evidence." Mayo Clinic Proceedings, 2018.
Last reviewed: March 2026
The information in this article is for educational purposes only and is not medical advice. Consult your doctor before beginning any sauna protocol.