Walk into most modern wellness studios and you'll be offered heat in at least three different forms: an infrared sauna, a traditional dry sauna, and something steam-based. They all make you sweat. They all feel restorative. But they work through genuinely different physics, they feel different on your skin, and — importantly — they are not backed by the same depth of research.

If you've ever stood in front of those options and wondered which one you should actually be booking, this guide is for you. We'll walk through how each type of heat works, what the evidence does and doesn't support, how to choose based on your goals and your heat tolerance, and how our members in Tarzana and across the San Fernando Valley typically use them.

The short answer

If you want the gentlest entry point and the ability to sit comfortably for 30 to 45 minutes, choose an infrared sauna. If you want the most intense, most traditional heat experience with the largest body of long-term research behind it, choose a traditional dry sauna. If you want warmth that feels soothing on the airways and skin without high air temperature, choose steam.

None of the three is universally "best." The right choice depends on how much heat you tolerate, how long you want to stay in, and what you're trying to get out of the session.

How each one actually heats you

Traditional (Finnish) sauna: hot air, dry room

A traditional sauna heats a room full of air — usually with a stove and a bed of rocks — to a high temperature with very low humidity. Typical operating conditions land somewhere around 150–195°F (roughly 65–90°C) with humidity in the 10–20% range. Pouring water over the rocks creates a short humidity spike, called löyly, that briefly makes the room feel dramatically hotter.

Because the air itself is doing the work, the heat hits your skin surface first. Sweat evaporates quickly in the dry air, which is exactly why most people find 10 to 20 minutes to be a full session. It is the most intense of the three by a wide margin.

Infrared sauna: radiant energy, mild air

An infrared sauna takes a different approach. Instead of superheating the air, infrared emitters produce radiant energy that your body absorbs directly — much the way you feel warmth standing in sunlight on a cool day. The air in the cabin stays comparatively mild, generally in the 110–150°F (about 43–65°C) range, with low humidity.

The practical consequence is comfort and duration. Because you aren't fighting scorching air, most people can sit for 30 to 45 minutes and still work up a substantial sweat. That makes infrared the most approachable option for anyone new to heat therapy, anyone who has struggled with the claustrophobic intensity of a hot dry sauna, or anyone who wants to read, breathe, and decompress rather than endure. Our complete guide to infrared sauna sessions covers what a first visit looks like in more detail.

Steam: lower temperature, saturated air

Steam rooms and steam pods run cooler than either sauna — usually somewhere around 110–120°F (about 43–49°C) — but at close to 100% relative humidity. That saturated air is why steam feels so much hotter than the thermometer suggests: your sweat has nowhere to evaporate to, so your body's primary cooling mechanism is largely blocked.

Steam is the option people reach for when they want warmth that feels gentle on the throat and sinuses and hydrating on the skin, rather than the dry, searing quality of a hot sauna. At Club Contour Studios, our steam offering is a private single-person Steam Pod rather than a shared tiled room — you can read more in our Steam Ozone Pod guide.

Side-by-side comparison

What the research actually shows

This is where an honest guide has to slow down. Heat therapy is genuinely interesting, and it is also an area where marketing tends to run well ahead of the evidence. Here's a fair reading.

Traditional sauna has the deepest evidence base

The most cited work comes from Finland, where sauna use is a lifelong cultural habit and therefore easier to study over decades. In a prospective cohort study of 2,315 middle-aged Finnish men published in JAMA Internal Medicine in 2015, researchers followed participants for a median of 20.7 years. Compared with men who had one sauna session per week, the adjusted hazard ratio for sudden cardiac death was 0.78 (95% CI, 0.57–1.07) for those with two to three sessions per week and 0.37 (95% CI, 0.18–0.75) for those with four to seven sessions per week. Longer sessions showed a similar pattern: compared with sessions under 11 minutes, sessions longer than 19 minutes carried an adjusted hazard ratio for sudden cardiac death of 0.48 (95% CI, 0.31–0.75).

Those are striking numbers, and they deserve one important caveat: this was an observational cohort, not a randomized trial. It can show association, not causation. People who sauna four to seven times a week may differ from people who sauna once a week in ways the adjustments couldn't fully capture. The authors themselves concluded that further studies are warranted to establish the mechanism.

Infrared sauna: promising, but a smaller body of work

Infrared heating has been studied clinically — most notably in Japan, where a standardized far-infrared protocol known as Waon therapy has been investigated in cardiovascular patient populations. The trials are generally small, and the total volume of published research on infrared is considerably thinner than the traditional sauna literature.

What can reasonably be said is that infrared reliably produces the core physiological signature of passive heating — elevated skin and core temperature, increased heart rate, peripheral vasodilation, and sweating — at a lower and more tolerable air temperature. Whether that translates into the same long-term outcomes reported in the Finnish cohorts has not been established.

Steam: comfort is well established, clinical outcomes less so

Steam's evidence base is the thinnest of the three. A frequently referenced Cochrane review examined heated, humidified air for the common cold and found the results inconsistent — some trials reported symptom relief and others did not, with the overall quality of evidence rated low and the reviewers concluding that steam inhalation is not recommended as a routine treatment for cold symptoms pending better trials. Minor adverse effects such as nasal irritation and lightheadedness were reported.

None of that makes steam useless. It makes steam a comfort and relaxation modality with modest clinical support, which is a perfectly reasonable thing for it to be.

The honest caveat that applies to all three

When you move from observational cohorts to controlled trials, the picture gets more measured. A 2025 systematic review and meta-analysis of randomized controlled trials examined non-acute effects of passive heating interventions — hot water immersion, saunas, hot yoga, and local heating — across twenty RCTs lasting two to fifteen weeks. It found no statistically significant pooled effects for most outcomes, including flow-mediated dilation, pulse wave velocity, resting heart rate, heart rate variability, fasting glucose, HbA1c, cholesterol fractions, triglycerides, and C-reactive protein. The pooled estimate for systolic blood pressure (–2.46 mmHg; 95% CI, –5.02 to 0.10) did not reach statistical significance, though the reviewers noted a potential reduction with systemic heating and among adults with underlying cardiovascular risk. Heterogeneity between studies was substantial.

Read that carefully and the takeaway is not "heat therapy doesn't work." It's that the controlled evidence is still developing, the effect sizes in short trials are modest, and anyone promising you specific clinical outcomes from a sauna session is getting ahead of what the literature currently supports. We'd rather tell you that plainly than sell you a number we can't stand behind.

So which one should you choose?

Choose infrared if…

• You're new to heat therapy and want a manageable first experience
• You want to stay in longer — 30 to 45 minutes rather than 15
• High air temperature has made you feel lightheaded or claustrophobic before
• You want a quiet, sustained session you can actually relax into
• You're building heat exposure into a regular weekly routine and want something repeatable

Choose a traditional dry sauna if…

• You already tolerate heat well and want maximum intensity
• You prefer a short, intense session over a long, mild one
• You're specifically drawn to the classic Finnish protocol that most of the long-term research describes

Choose steam if…

• Dry heat feels harsh on your throat, sinuses, or skin
• You want warmth without a high air temperature
• You're after a soothing, enveloping session focused on relaxation
• You want a private, self-contained experience rather than a shared room

Can you combine them?

Yes — and many people find that a combination is more satisfying than committing to a single modality. Pairing heat with cold is the most common approach: a heat block followed by a cold plunge, repeated in cycles, is what's generally meant by contrast therapy. We've written a full breakdown in our contrast therapy guide.

Timing matters if you're training. If you're pairing heat and cold around workouts, the order and spacing can affect what you get out of it — we covered that specifically in how to time sauna and cold plunge around your training goal.

Our Wellness Experience is built around exactly this idea: infrared sauna, cold plunge, and steam in one private, sequenced session, so you can feel the differences back to back rather than guessing from a description.

How often and how long

There's no single prescription, and any studio that gives you one without knowing anything about you is guessing. That said, a few practical principles hold up well:

• Start conservatively. A first infrared session of 20 minutes, or a first dry sauna session of 8 to 10 minutes, is a reasonable place to begin. Extend from there as your tolerance builds.
• Consistency beats heroics. The observational data that generated interest in sauna use described a regular, lifelong habit — not occasional extreme sessions.
• Hydrate before and after. You are losing meaningful fluid and electrolytes. Replace them.
• Get out when you need to. Lightheadedness, nausea, or a racing heart are signals to end the session, not to push through.
• Cool down deliberately. Give yourself a few minutes at room temperature before you stand up quickly or head out to your car.

Safety: who should talk to a clinician first

Heat is a real physiological stressor, and it isn't appropriate for everyone. A widely cited review in The American Journal of Medicine notes that sauna bathing is well tolerated by most healthy adults and children, and identifies unstable angina pectoris, recent myocardial infarction, and severe aortic stenosis as contraindications. The same review notes that sauna bathing is safe during the uncomplicated pregnancies of healthy women — but pregnancy is exactly the situation where an individual conversation with your own obstetric provider matters more than a general statement in an article.

A few additional practical points: alcohol and heat exposure are a genuinely poor combination and should not be mixed. Certain medications — including those affecting blood pressure, fluid balance, or sweating — can change how your body handles heat. And if you have any cardiovascular condition, are managing a chronic illness, or simply aren't sure, the right move is to ask your physician before you start rather than after.

If you'd like that conversation in-house, Contour Medical Clinic operates on-site and can review your history, run comprehensive lab work, or complete a body composition analysis to establish a baseline before you build heat therapy into a routine.

Frequently asked questions

Is an infrared sauna better than a traditional sauna?

Neither is objectively better. Infrared is more comfortable and allows longer sessions at lower air temperatures; traditional dry saunas deliver higher intensity and have a substantially larger body of long-term observational research behind them. The better question is which one you'll realistically use consistently.

Do you sweat more in a steam room or a sauna?

You will typically feel wetter in a steam room, but much of that is condensed water vapor on your skin rather than sweat you produced. Because steam blocks evaporative cooling, your body's actual sweat output in a saturated environment is harder to gauge by feel alone.

Which is best for sore muscles after a workout?

Most people who train reach for heat for the comfort and the sense of loosening, and pair it with cold for a contrasting effect. Timing relative to your session matters more than which heat modality you pick — our post-workout timing guide walks through it.

Does sweating in a sauna detox your body?

Your liver and kidneys handle detoxification. Sweat is primarily a thermoregulatory fluid, and the quantities of anything meaningful excreted through it are small. Heat therapy has plenty of appeal without leaning on that particular claim, so we don't make it.

Can I use a sauna every day?

Many people do, and the Finnish cohort data described participants using saunas up to four to seven times per week. Whether daily use is appropriate for you specifically depends on your health status, hydration, medications, and how you feel after sessions. Build up gradually rather than starting at daily.

What should I bring to my first session?

Water, a change of clothes, and a bit of buffer time on either side. We provide towels and everything else you'll need. Our sessions are private, so you won't be sharing the space with anyone you didn't bring.

Try all three in Tarzana

Reading about the difference between radiant heat, hot dry air, and saturated steam only gets you so far. Twenty minutes in each tells you more than any comparison table can, because heat tolerance is deeply individual — the modality that one person finds punishing is the one another person books every week.

Our Wellness Lounge in Tarzana houses a private infrared sauna, a cold plunge, and a private Steam Pod, and we serve guests from across the San Fernando Valley including Encino, Woodland Hills, and Sherman Oaks. Every session is private — no shared benches, no waiting for a spot.

Ready to find out which one is yours? Book a visit or explore membership and session pricing. If you'd rather talk it through first, call us at (818) 214-9607 or get in touch — we're at 19327 Ventura Blvd, Suite F, Tarzana, CA 91356.

This article is for general educational purposes and is not medical advice. If you have a cardiovascular condition, are pregnant, take medications that affect blood pressure or fluid balance, or have any concern about whether heat therapy is appropriate for you, speak with your physician before beginning.