Sauna First or Cold Plunge First? The Best Order for Contrast Therapy

You've got a sauna and a cold plunge in front of you, and the first decision is already a good one to get right: which goes first?

It's one of the most common questions people ask before their first contrast therapy session, and there's a straightforward answer. Most people start with heat and move to cold. But the order of the first step matters less than most people think, and the order of the last step is where you get to customize the session to how you want to feel.

This guide covers the standard sequence, why it works, how many rounds to do, and how to pick the finish that fits your goal.

The Short Answer: Start With Heat

For a standard contrast therapy session, start in the sauna, then move to the cold plunge. That's the order used in the Nordic tradition that contrast therapy grew out of, and it's the order almost every studio is set up around.

There are a few practical reasons it works so well:

• You're warm when you hit the cold. Heat leaves your skin flushed and your muscles loose, so the plunge feels more manageable than it does when you walk in cold. Most people find the first 30 seconds of a plunge noticeably easier after a sauna.
• The cold feels like a reset, not a punishment. After 10 to 15 minutes of sweating, cold water is a relief.
• It keeps heat under control. Cold water is a fast way to bring your body temperature down. In a 2026 crossover study of 16 adults in Experimental Physiology, researchers had people complete two 15-minute, 85°C sauna bouts, each followed by a 10-minute cooling break. When the cooling break included 90 seconds of cold-water immersion, participants' core temperature at the end of the second bout was about 0.5°C lower (37.55°C vs. 38.03°C), their heart rate was lower (108 vs. 125 bpm), and they reported feeling less hot and better able to tolerate the second sauna.

That last point is a good way to think about the whole idea. The cold isn't just something you endure after the sauna. It makes the next round of heat more comfortable too.

Can You Start With the Cold Plunge?

Yes. Nothing about it is unsafe, and some people prefer it, especially when they want to wake up and then warm up. But it comes with trade-offs:

• You're entering cold water with a cold body, so the first minute tends to be harder.
• You may feel chilled walking into the sauna, which makes it harder to judge when you're properly warmed up.
• Many people simply find it less enjoyable, which matters because the best protocol is the one you'll keep doing.

The research doesn't crown one sequence as the only right way. A scoping review of contrast therapy protocols found that studies varied a lot in their temperatures and durations and that evidence for effects on physiological measures was less clear than for how people felt. In other words, order is mostly a matter of what works for your body and your goals, not a hard rule. Start with heat unless you have a reason not to.

How Many Rounds, and How Long?

A good starting framework:

A few guardrails from medical sources keep this practical:

• Sauna: Harvard Health recommends no more than 15 to 20 minutes in a sauna at a time, and cooling down gradually afterward.
• Cold plunge: Cleveland Clinic says a session should never go longer than five minutes, with beginners keeping it to a minute or two. For newcomers, it suggests water in the 50 to 59°F range.
• Total time: In a meta-analysis of contrast water therapy trials, sessions typically ran between 6 and 24 minutes of alternating water immersion, with cold water between 8 and 15°C and hot water averaging about 39°C. Those are shorter, water-only protocols, so don't read them as the target for a sauna session. But they show that effective protocols don't need to be marathon efforts.

You don't need to push to the top of these ranges. Two comfortable rounds beat three miserable ones.

Choosing Your Finish: Cold or Hot

This is the part you get to customize. The last temperature you end on shapes how you feel when you walk out.

End on cold if you want to feel alert and energized. This is a good choice in the morning, before a workout, or any time you want to stay sharp. Ending in the cold leaves your skin cool and your head clear.

End on heat if you want to wind down. This is a better fit in the evening, when you want to relax and head home to sleep. If you're using contrast therapy to support rest, our guide to sleep and contrast therapy goes into more detail.

End on cold after hard training if you're chasing recovery. Many people finish on cold post-workout. If you're working contrast therapy into a training week, see should you cold plunge before or after a workout for timing around lifting.

Both are valid. Think of the finish as a dial: cold for energy, heat for calm.

A Sample Session

Here's a simple, beginner-friendly session to follow:

1. Hydrate and rinse off before you start.
2. Sauna, 10 to 15 minutes. Get warm and sweating, then step out before you feel drained.
3. Cold plunge, 1 to 2 minutes. Take slow exhales through the first 30 seconds.
4. Rest, 2 to 3 minutes. Dry off and let your heart rate settle.
5. Round two. Repeat the sauna and plunge.
6. Optional round three if you feel good.
7. Finish on your choice of cold for energy or heat for calm.
8. Rehydrate. Harvard Health suggests two to four glasses of cool water after a sauna.

Common Sequencing Mistakes

• Going straight from a hot sauna to the coldest water you can find. Ease in. A cooler (not freezing) plunge after sauna is plenty.
• Skipping the rest between rounds. The pause lets your heart rate and breathing settle so each round starts fresh.
• Staying in the sauna until you feel awful. If you're lightheaded, you've gone too long. Step out.
• Ending on the wrong temperature. If you need to sleep, don't finish on a long, hard plunge. If you need to be sharp in an hour, don't finish in a hot sauna.
• Treating the order as a rule you can't break. If starting in the cold works better for you, it's fine. Listen to your body.

For more tips on getting the most from each session, check out 10 Tips to Plunge Like a Pro and our overview of the benefits of contrast therapy.

A Quick Safety Note

If you have a heart condition, uncontrolled high blood pressure, are pregnant, or have circulation problems, talk to your healthcare provider before starting. Skip alcohol, and don't go in if you're ill. Get out right away if you feel dizzy, faint, or unwell.

The Bottom Line

Start with the sauna, move to the cold plunge, rest, and repeat two or three times. Heat first makes the cold easier to take, and the cold makes the next round of heat more comfortable. Then pick your finish: cold for energy, heat for calm.

Try the Full Cycle at PLUNJ

At PLUNJ, the sauna and cold plunge sit side by side in every studio, so moving between them is simple. Our team can walk you through your first session and help you find the rhythm that works for you.

Book your session at PLUNJ and try it for yourself.

Sources:

Bieuzen, F., Bleakley, C. M., & Costello, J. T. (2013). Contrast water therapy and exercise induced muscle damage: a systematic review and meta-analysis. PLoS ONE, 8(4), e62356.

Cleveland Clinic. Can ice baths ease my sore muscles? Cleveland Clinic Health Essentials.

Greenhalgh, O., Alexander, J., Richards, J., Selfe, J., & McCarthy, C. (2021). The use of contrast therapy in soft tissue injury management and post-exercise recovery: a scoping review. Physical Therapy Reviews, 26(1), 64–72.

Harvard Health Publishing. Sauna health benefits: are saunas healthy or harmful? Harvard Health.

Owen, F., Giles, C., Leaney, S., Coombs, G., & Oliver, S. (2026). Thermal and cardiovascular responses to sauna are attenuated by adding cold water immersion to cooling breaks. Experimental Physiology.