A good sauna session follows a simple rhythm: prepare your body, sit in the heat for a set time, cool down, and repeat if you want. Most people benefit from 15 to 20 minutes per round at temperatures between 160°F and 195°F in a traditional sauna, or 110°F to 140°F in an infrared sauna. But the details of what you do before, during, and after that heat exposure make a real difference in how you feel and how much benefit you get.
Before You Go In
Start hydrating one to two hours before your session. Sip 16 to 20 ounces of water gradually rather than chugging it right before you step in, which can cause bloating without actually hydrating your cells in time. Adding an electrolyte mix without sugar helps your body hold onto that fluid. Snacking on water-rich foods like cucumber, watermelon, or oranges is another easy way to top off your hydration.
Skip caffeine and alcohol beforehand. Both are diuretics that accelerate fluid loss, and alcohol in particular raises the risk of dangerous drops in blood pressure and heart rhythm problems in the heat. Avoid heavy meals too. Your body redirects blood flow to your skin to cool itself during a sauna session, and digesting a large meal at the same time can leave you feeling nauseated.
Take a quick shower before entering. This is both a hygiene courtesy in public saunas and practical: rinsing off removes lotions, deodorants, and surface grime that can feel unpleasant as you sweat. If you want to protect your hair from drying out, wet it with cool water first or apply a light layer of coconut or argan oil. These create a barrier that locks in moisture and prevents your strands from absorbing excessive heat.
How Long to Stay In
If you’re new to saunas, start with just 5 minutes. Add one to two minutes every four or five visits until you’re comfortable at the 15 to 20 minute mark. This gradual approach lets your body build heat tolerance without overwhelming it. For pure relaxation, 5 to 10 minutes is enough. For cardiovascular benefits, aim for 15 to 20 minutes, exiting shortly after you begin sweating heavily.
Thirty minutes of continuous time is the recommended maximum for safety, even for experienced users. The moment you feel lightheaded, dizzy, nauseous, or notice unusual heart sensations, leave immediately regardless of how long you’ve been in. These are signs your body is struggling to regulate its core temperature.
In an infrared sauna, sessions often run a bit longer because the lower temperatures (110°F to 140°F) take more time to produce deep sweating. Traditional Finnish saunas operate between 160°F and 195°F and produce intense heat faster, so you’ll typically feel ready to step out sooner.
What to Do While Sitting in the Heat
The sauna is one of the few places where doing less is the whole point. Most people sit or lie down on a towel, close their eyes, and let the heat work. But you can use the time more intentionally with a few simple practices.
Slow, controlled breathing is the most effective thing you can do in the heat. It helps your body manage the stress response that high temperatures trigger. Try breathing in slowly through your nose for a count of four, holding for four, and exhaling through your mouth for six to eight counts. This activates your body’s calming nervous system and deepens relaxation. Alternating which nostril you breathe through (closing one with your finger, then switching) is another technique that research has linked to reduced physiological stress and improved focus.
Body scanning works well in a sauna too. Start at your feet and slowly move your attention upward, noticing where you feel tension and consciously relaxing those muscles. The heat is already loosening your body, so pairing it with deliberate attention amplifies the effect.
In Finnish tradition, pouring water over heated rocks (called löyly) creates a burst of steam that temporarily spikes the humidity and perceived temperature. If the sauna you’re in has rocks and a water bucket, ladling a small amount of water onto them is part of the experience. Just be considerate of others who may not want the extra intensity.
The Cool-Down Between Rounds
Cooling down between heat sessions isn’t optional. It’s where much of the benefit happens. When you step out of the sauna and expose your body to cold, your blood vessels near the skin constrict rapidly. This contrast between dilation and constriction is what gives sauna bathing its cardiovascular training effect, similar to a gentle workout for your blood vessels.
Your options range from mild to intense: step outside into cool air, take a cool or cold shower, or do a cold plunge. If you’re trying a cold plunge, start with 30 to 60 seconds on your first round. On subsequent rounds, you can extend to 45 to 90 seconds, eventually building up to one to three minutes over weeks. Short cold exposures deliver recovery and alertness benefits (by activating your sympathetic nervous system) without the risks of overdoing it.
A solid beginner routine looks like this:
- Round 1: 10 to 15 minutes in the sauna, then 30 to 60 seconds of cold exposure
- Round 2: 10 to 15 minutes in the sauna, then 45 to 90 seconds of cold exposure
Rest for 5 to 10 minutes between rounds if you need it. Two to three rounds is standard for most people.
Etiquette in Public Saunas
Rules vary by culture and facility, but a few are nearly universal. Always sit on a towel. This protects you from hot surfaces and keeps the bench clean for the next person. In most public saunas in North America and the UK, wearing a swimsuit or wrapping a towel around your body is expected. In Scandinavian and German saunas, nudity is the norm and wearing a swimsuit may actually be discouraged. Check the house rules.
Keep your voice low or stay silent. Saunas are treated as quiet spaces, and loud conversation or phone use disrupts the experience for everyone. Don’t enter wearing dirty gym clothes or street shoes. If you’ve just finished a workout, shower first.
After Your Session
Rehydrate immediately. You lose a significant amount of fluid through sweat during a sauna session, and replacing it with water plus electrolytes is more effective than water alone. Continue sipping for the next hour or two rather than drinking a large amount at once.
Rinse your hair with cool water after your session. This closes the hair cuticle, locking in moisture and reducing frizz. Follow with a hydrating conditioner or leave-in treatment to replenish what the heat stripped out. Washing your scalp is especially important: sweat left on the scalp can clog hair follicles over time, potentially leading to dandruff or irritation.
Give yourself at least 10 to 15 minutes to rest before jumping back into your day. Your heart rate and core temperature need time to return to baseline, and this cool-down period is when many people feel the deepest sense of calm.
How Often to Use a Sauna
Three to seven sessions per week appears to be the sweet spot for long-term health benefits. A large Finnish study tracking over 1,600 men and women found that bathing four to seven times per week was connected to a reduced risk of stroke in older adults. A separate study of nearly 14,000 Finnish adults found that more frequent use was associated with lower rates of dementia and Alzheimer’s disease.
You don’t need to start at that frequency. Even two or three sessions per week delivers meaningful benefits for relaxation and cardiovascular health. Consistency matters more than any single session.
Who Should Be Cautious
People with unstable chest pain, a recent heart attack, or severe narrowing of the heart’s aortic valve should avoid sauna use. Pregnant women are generally advised to limit heat exposure, particularly in the first trimester. If you take medications that affect blood pressure or heart rate, the combination with extreme heat can amplify those effects unpredictably. Drinking alcohol during a sauna session is one of the clearest risk factors for serious events, including dangerous drops in blood pressure and sudden cardiac problems.