Sauna: More Than Just Heat – A Science-Based Guide
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Sauna is often marketed as a luxury — a warm room, a nice smell, a quick reset. But historically, sauna has been something else entirely: a practical ritual for hygiene, recovery, and community.
Today, research is catching up with what many cultures have known for centuries: heat exposure can influence circulation, the nervous system, and recovery. At the same time, sauna isn’t a “more is better” tool — and it isn’t for everyone. The key is understanding what happens in your body, how to use sauna safely, and how to make it fit your life (and your comfort level).
In this guide, we’ll look at:
what sauna does in the body (in simple terms)
what research supports (and what it doesn’t)
how to start safely (especially if you’re new)
cultural sauna norms — including nudity, clothing, and why it differs
who should use caution and when to seek medical advice
A cultural perspective: why sauna etiquette differs so much
One of the biggest “culture shocks” in sauna isn’t the heat — it’s the dress code. In some countries, being completely naked is normal and expected. In others, it would feel inappropriate, and swimwear (or at least coverage) is the default.
Where nudity is common (and why)
In many Central and Northern European sauna traditions, nudity is linked to three ideas: hygiene, equality, and practicality.
Germany / Austria (many public saunas): Often nude, frequently mixed-gender, with a towel used as a barrier on benches. The logic is hygiene (no sweaty swimwear) and a “wellness space” mindset rather than a sexualised one.
Finland (traditional sauna culture): Nudity is common in private settings and same-gender contexts; in mixed public settings, rules vary by location. The core idea is that sauna is normal, everyday, and non-sexual — more like a shared ritual than a performance.
Switzerland / parts of Northern Italy (wellness/spa culture): Similar to German-speaking sauna etiquette in many facilities: nude sauna areas, towel required on benches.
Practical note: even in nude cultures, the towel is the “clothing” — you sit on it for hygiene, and many people wrap it when walking around.
Where people are usually covered (and why)
In other cultures, coverage is tied to modesty norms, mixed-gender comfort, and public facility rules.
Examples often include:
United States / Canada (many gyms and public facilities): Swimwear or towels are common; nudity may be limited to locker-room contexts.
United Kingdom / Ireland (many leisure centres): Swimwear is often expected in mixed settings.
France / Southern Europe (varies by venue): Many places lean toward swimwear in mixed-gender wellness areas, though some spa/sauna zones follow German-style nude rules.
Key takeaway: there isn’t one “correct” way — there are local norms. When in doubt, check the facility’s rules and choose what helps you relax.
A short historical background
Sauna didn’t start as a biohacking tool. In many places, it was a basic life technology:
a warm, clean space for washing when homes didn’t have modern plumbing
a place for recovery after physical labour
a social ritual for connection and conversation
In Finland especially, sauna has also been linked historically to major life moments (including birth and end-of-life care) — because it was one of the cleanest, warmest places available.
What happens in the body? The physiology of sauna bathing
When you step into a sauna, your body is exposed to high temperatures (often around 80–100°C in a traditional Finnish sauna). Your skin temperature rises quickly, and your core body temperature may increase by around one degree Celsius. This heat triggers thermoregulatory responses: blood vessels in the skin dilate, skin blood flow increases markedly, and sweat production ramps up (Mero et al., 2024; Laukkanen et al., 2024).
After the heat phase, a cold shower, plunge pool, or fresh air creates a sharp contrast. Cold exposure activates receptors in the skin, can cause rapid constriction of blood vessels, and may stimulate the sympathetic nervous system — which many people experience as invigorating.
Cardiovascular responses can be significant: heart rate often rises, and cardiac output increases. For healthy individuals, blood pressure may drop slightly due to peripheral vasodilation, but responses vary and depend on baseline health, hydration, and sauna intensity (Laukkanen et al., 2024).
Regular sauna use is also discussed in relation to immune markers and inflammation. Some studies suggest changes in white blood cells and immune signalling molecules over time, though findings depend on protocol and population (Mero et al., 2024). Warm air and humidity (especially in steam environments) may also feel supportive for breathing comfort for some people (Cleveland Clinic, 2024).
Health benefits: what does the research say?
Research suggests that regular sauna use is associated with favourable cardiovascular outcomes in certain populations, and it has been discussed in relation to blood pressure, cardiovascular risk, and broader long-term health markers (Laukkanen et al., 2024; Frontiers in Cardiovascular Medicine, 2025). Sauna bathing is also commonly reported as supportive for relaxation, mood, and perceived recovery.
Important: association is not the same as a guarantee. Benefits depend on consistency, overall lifestyle, and individual health status.
How to start: practical tips for sauna beginners
Start slow: Begin with 8–10 minutes and build gradually.
Hydrate: Drink water before and after to replace fluids lost through sweat (Cleveland Clinic, 2024).
Use rounds: Many people do 1–3 rounds with rest/cool-down in between.
Heat–cold contrast (optional): If you enjoy it and tolerate it well, alternate heat with a cold shower/plunge or fresh air.
Rest between rounds: Give your body time to settle.
Frequency: 1–3 sessions per week is enough for many people to notice benefits (Laukkanen et al., 2024).
Sauna variations (and how they feel)
Finnish (dry) sauna: High temperature, low humidity — classic and widely studied.
Steam sauna (Turkish/Roman): Lower temperature, higher humidity — often feels gentler on the airways.
Infrared sauna: Radiant heat at lower air temperatures; some people find it more accessible if they’re heat-sensitive (Cleveland Clinic, 2024).
Who should use caution? (contraindications)
Sauna isn’t suitable for everyone. Use extra caution and seek medical advice if you have relevant health conditions or take medication that affects blood pressure, heart rhythm, or hydration.
Common situations where caution is advised include:
acute infection or fever
uncontrolled high blood pressure
severe heart failure or unstable coronary artery disease
epilepsy
severe venous disease (e.g., acute thrombosis)
open wounds or skin infections
pregnancy (especially early pregnancy; guidance varies)
If you’re unsure, it’s sensible to check with a medical professional before starting.
Body & Beyond take: sauna as maintenance, not a performance
From a Body & Beyond perspective, sauna is interesting because it’s a simple way to give your system a clear signal: heat → circulation changes → nervous system response → recovery window.
Used well, sauna can be a practical recovery ritual — especially when life is busy. Used poorly (too hot, too long, too dehydrated), it can become another stressor.
A good rule of thumb: leave the sauna feeling calm and clear, not flattened.
References
Laukkanen, T. et al. (2024). 5 Science-Backed Sauna Benefits. Forbes Health. https://www.forbes.com/health/wellness/sauna-benefits/
Frontiers in Cardiovascular Medicine (2025). Sauna use as a novel management approach. https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2025.1537194/full
Mero, A. et al. (2024). Clinical Effects of Regular Dry Sauna Bathing. PubMed Central. https://pmc.ncbi.nlm.nih.gov/articles/PMC5941775/
Schimmelpfennig, HP. Physiologie des Saunierens. Unpublished manuscript.
Health.com (2024). Study: People Who Sauna Report Being Happier, Healthier. https://www.health.com/study-sauna-better-physical-mental-health-8778859
Cleveland Clinic (2024). Get Your Sweat On: The Benefits of a Sauna. https://health.clevelandclinic.org/sauna-benefits
Professional qualifications
Rolfing® is a registered service mark of the Dr Ida Rolf Institute of Structural Integration
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All trademarks mentioned remain the property of their respective owners
Professional standards All medical and scientific statements are based on current research and professional experience. As an alternative practitioner in training, I work according to the strict guidelines of the German Alternative Practitioners Act.
About the author
Tobias Elliott-Walter is a certified Rolfer® Structural Integration practitioner, certified ScarWork™ practitioner, and Sivananda yoga teacher based in Saarbrücken, Germany. Through Body & Beyond, he offers bilingual bodywork and educational content in English and German, with a focus on fascia, movement, stress, recovery, and holistic health.
Before founding Body & Beyond, Tobias spent more than 20 years working internationally across Europe, Asia, the Middle East, and North America in leadership and people development. That experience continues to shape his work today: practical, culturally sensitive, collaborative, and grounded in the belief that sustainable change often begins with better understanding, not more pressure.
Important note
This article is for information purposes only and does not replace medical advice. The information shared here is based on current scientific research and practical experience. If you have any health complaints, please consult your doctor or therapist.
© 2026 Tobias Elliott-Walter. All rights reserved.
