Are you sauna-ing wrong? 😅
A few weeks back we wrote about what you're actually sweating out in the sauna, and apparently that struck a nerve, because the sauna has been busier than ever so we're just going to tell you everything already. And we put it all in one place for you to save and pretend to consult before every session 😅
Fair warning: the research on this is almost annoyingly good. Most wellness trends fall apart the second you ask them for a study, but the sauna shows up with two decades of Finnish data and then some.
What's even happening in there?
When you sit in a hot room, your body does something fascinating — it panics, but productively. Your heart rate climbs, your blood vessels open up, your circulation shifts into a higher gear, and you start sweating spontaneously. From the inside it feels like sitting still, but from your cardiovascular system's point of view, you're doing a light cardio session while actually doing nothing, which is the dream.
This all runs on something called hormesis — the principle that a little bit of the right kind of stress makes you tougher. Exercise works this way, and so does the sauna, because the heat is a manageable challenge that your body adapts to by becoming more resilient, which is a very charming trick for a warm wooden closet to pull off.
Quick note on temperature, since people ask
You'll see sauna research throwing around numbers between 174°F and 194°F, which sounds made up until you realize that's just the traditional Finnish range where all the good studies happened. Ours runs right around 180°F, which lands it right in the sweet spot the researchers actually used — not a lukewarm wellness-spa situation, and not hot enough to provoke a search party for your eyebrows. It's the real thing, calibrated to right where the science says the magic lives 🔥
The heart stuff (buckle up, this is the big one)
This is the part that takes the sauna from "nice amenity" to "my latest obsession."
A landmark study followed over 2,000 people in Finland for two decades and found that folks who used a sauna 4 to 7 times a week had a 40% lower risk of dying of anything at all compared to the once-a-week crowd. We want to be clear that we did not typo that — forty percent, from sitting in a hot room.
The same research found the most frequent users had a 63% lower risk of sudden cardiac death and a 50% lower risk of fatal heart disease, and the benefit kept climbing the more often people went, with no ceiling and no point of diminishing returns — just a loyalty program that keeps paying out the more you show up.
Now, the responsible fine print, because you've been reading us long enough to know we don't oversell: these are observational studies, so they show a strong association rather than airtight cause and effect, and it's possible the people going seven times a week were doing other healthy things too. But the effect is so large and so consistent that even the cautious scientists got a little excited, and the follow-up research on stroke, blood pressure, and dementia keeps pointing the same direction.
Your brain likes it too
From that same Finnish group, the 4-to-7-times-a-week people had a 66% lower risk of dementia and a 65% lower risk of Alzheimer's than the once-a-weekers, which is a wild number for something that feels like a nap with ambitions.
The working theory is refreshingly logical: the same things helping your heart — better circulation, less inflammation, lower blood pressure — are also helping your brain, which is an extremely needy organ that gets cranky when blood flow is poor. Add in the better sleep and lower stress that regular sauna users report, and your neurons are getting a spa day whether they asked for one or not 🧠
The part that matters if you actually lift
Here's where it gets relevant for those of you who come in to move heavy things around. Heat makes your body pump out heat shock proteins, which sound like a villain from a low-budget sci-fi movie but are actually tiny repair crews that protect your cells and help your muscles bounce back and grow, which is why heat has become a legitimate topic in the strength world and not just the bathrobe-and-cucumber-water world.
A sauna after training boosts blood flow to worn-out muscles, activates those repair proteins, and helps calm inflammation. There's even performance data — a small study of distance runners doing two half-hour sessions a week saw a 32% jump in time to exhaustion after three weeks, because the heat teaches your body to handle thermal stress and expand your blood plasma, and those adaptations follow you right out onto the road.
And a bonus for the muscle-focused crowd: if you're choosing between heat and cold after lifting, know that post-workout cold water immersion has been shown to blunt muscle growth — one gold-standard study using MRI found it cut quad growth from about 15% down to a barely-there 2% over 12 weeks — while the sauna has no such downside, so heat is the friendlier choice when you're trying to build 💪
When to do it
Post-workout is the sweet spot. Your muscles are already warm, your blood is already moving, and your body's already in repair mode, so the heat pours fuel on a fire that's already going. A controlled trial found that 15 minutes of post-workout sauna three times a week improved fitness, blood pressure, and cholesterol beyond what the exercise did alone, which we mentioned a while back but it's worth repeating because it's the single most useful timing tip we've got.
Going in beforehand is the one thing to skip, since a pre-workout sauna heats you up and drains your fluids before you've done anything useful, which tends to tank your performance right when you need it. The sauna is the reward, not the warm-up 😌
How soon you'll feel it — and when to time it for sleep
Good news for the impatient among us: you don't have to wait months to notice a thing, because the relaxation and better sleep tend to show up the very same night, while the cardiovascular changes start becoming measurable within about two weeks of regular use, so the payoff is both immediate and cumulative — which is rare for anything that's actually good for you.
That sleep benefit comes with a timing detail worth knowing, especially for the evening crowd. It's not the heat itself that makes you sleepy — it's the cool-down afterward, because stepping out of the sauna sends your core temperature dropping faster and lower than it would on a normal night, and that drop is one of the strongest signals your body uses to trigger sleep. A meta-analysisfound that passively heating the body one to two hours before bed helped people fall asleep roughly ten minutes faster, and wearable data from tens of thousands of users has shown meaningfully more deep sleep on sauna nights. The one thing to sidestep is climbing into bed immediately after, within that first half hour or so, since your core temperature is still up and hasn't begun its slide down yet — so finishing your session about one to two hours before bed gives your body the runway to cool off and do its thing 😴
And if you're already using the sauna as your post-workout wind-down, it pairs beautifully with the recovery center, where the Red Light bed, PEMF mat, and Vibragenix machine are built for that same "you just worked hard, now let your body catch up" moment — easy to stack into one very restorative lap before you head out.
How to actually do this without overthinking it
Start at 10–15 minutes and build from there, with around 20 minutes as the next step, since that's roughly where the Finnish research found the cardiovascular benefits hit their stride, and most protocols land in the 15–30 minute range around it. If you ever feel genuinely unwell rather than just warm and mildly dramatic, step out, because this isn't a competition and nobody's handing out medals for staying in longest. The heart-related benefits showed up at 4–7 times a week, though even 2–3 gets you real results, and since our sauna is included with every membership tier, the only thing between you and the good range is remembering it's there before you leave 🙂
One non-negotiable: you're going to sweat a startling amount, so drink water before, during, and after — it's the easiest part of the whole routine and also the part people somehow skip. There's also a bit of simple etiquette posted right by the sauna, so a quick glance at those signs covers everything you need to be a considerate presence in a shared hot box.
Who should take it easy
The sauna is safe for most people, but check with a doctor first if you're pregnant, prone to fainting or low blood pressure, dealing with a serious heart condition, or on meds that mess with hydration or blood pressure. And please don't combine it with alcohol, since that's a genuinely rough pairing rather than a fun one, and if you ever feel actively unwell in there, the move is always to step out, because none of these benefits do you any good if you cook yourself achieving them 😅
The short version
The sauna asks you to sit down and relax, and hands back a healthier heart, a sharper brain, faster recovery, and likely a longer life in return. It's included with your membership, it's already the perfect temperature, and it's sitting there waiting for you — so next time you're heading for the door, take the scenic route through 180 degrees 🔥
Oh, and we haven't forgotten the steam room right beside it, which plays a slightly different game with wet heat instead of dry, and it's earned its own deep dive that we'll bring you soon 💨
Is it hot in here or is it just this scorching hot newsletter?
Your West Coast Fitness Family
PS: We went all in on this because it deserves it, and so do you. And selfishly, we want to see you around here as long and as often as possible 🥹
