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Wooden sauna, cold plunge pool and a resting bench

Sauna and cold plunge: how to do hot and cold rounds

By the zauna editorial team · Updated 3 October 2026

A sauna and cold plunge round usually starts with heat, followed by a brief cold dip and a rest before repeating. Start shorter and warmer rather than chasing extremes. The supplied guides disagree on exact timings, so treat their routines as examples, not targets. Do not plunge alone, and stop immediately if you feel dizzy or faint.

What does a hot and cold round involve?

The basic pattern is straightforward: spend time in the sauna, move to the cold plunge, then pause before deciding whether to repeat. These alternating hot and cold sessions are often called contrast therapy. Rest belongs in the routine too; it is not just about moving between temperatures.

Most of the supplied guides begin with the sauna. Ember Saunas says heat should always come first. Polar Monkeys also starts its standard routine with heat, but gives an evening variation that starts cold. There is therefore no single order agreed across these sources.

For a simple introduction, keep the heat, cold and rest stages distinct. Do not treat completing a planned number of rounds as more important than how you feel. Ember and Polar Monkeys both favour shorter, repeatable sessions over pushing through an extreme session.

How long should you spend in the sauna and cold plunge?

The guides give noticeably different timings. Polar Monkeys suggests 8–10 minutes in the sauna for beginners, with a general sauna range of 71–88°C. Ember gives 8–15 minutes per heat round. Psycle describes a longer, hotter routine of 15–20 minutes at 80–100°C. Those are different protocols, not interchangeable instructions.

Cold timings differ even more. Ember allows beginners to start with 20–30 seconds. Polar Monkeys gives beginners 60–120 seconds, while Psycle describes 2–3 minutes. Polar Monkeys lists cold water at 7–13°C; Psycle uses 10–15°C.

If you are new, the shorter, warmer approach described by Ember and Polar Monkeys is the more restrained starting point among these examples. Do not read an upper limit as a target. Ember advises staying comfortable in the heat rather than pushing through discomfort. Polar Monkeys advises shortening the cold stage if your breathing becomes ragged.

Sauna beside a cold plunge pool, with steam above the water

Should you pause between heat and cold?

The sources disagree about the transition. Ember describes stepping directly from the sauna into the plunge. Polar Monkeys includes a 2-minute break to walk, towel off and breathe before entering the water. Wild Sauna Club describes using its watering-can shower between the sauna and cold bath.

Rest after the cold stage varies too. Ember suggests 2–5 minutes before repeating. Psycle describes 5–10-minute intervals between rounds. These differences are worth keeping in mind when you see a routine presented as the only correct method.

Polar Monkeys advises entering the cold calmly, keeping the exhale controlled and avoiding breath holds in the water. Stand up slowly rather than rushing the transition. A pause is also a chance to check how you feel before choosing another round. Keep that check separate from any timer you are following.

How many rounds should you do?

Polar Monkeys and Psycle both suggest up to 2 rounds for beginners. Ember describes 2–3 rounds in its general routine. You do not need to adopt the longest version simply because it appears in a guide. The beginner examples contain fewer rounds than the more demanding routines.

If you change your routine, Polar Monkeys recommends altering only a single element at a time: duration, temperature or number of rounds. That means not making the water colder while also staying longer and adding another cycle. Its guidance starts with warmer temperatures and shorter exposure.

Both Ember and Polar Monkeys describe finishing cold in some routines and warm in others. Their ending choices are not universal rules. Keep the emphasis on a manageable sequence rather than a required final temperature. Neither a longer plunge nor an extra heat round needs to become a competition.

Wooden sauna beside a cold plunge pool with still water

What precautions should you take?

The supplied guides include practical precautions alongside their routines. Keep these in view before concentrating on minutes or temperatures:

  • Do not plunge alone, particularly when you are new.
  • Avoid holding your breath in the cold water.
  • Stand slowly when leaving a stage of the session.
  • Drink water before and after your session.
  • Stop immediately if you feel dizzy or faint.

Ember advises speaking to a healthcare professional before starting if you have cardiovascular conditions, blood pressure concerns or are pregnant. Polar Monkeys also includes respiratory and neurological conditions in its advice to consult a clinician first.

These timing examples are general guidance, not an individual assessment. The sources themselves tell you to respond to discomfort rather than force the session. Keep that instruction ahead of any planned duration.

What can you expect at a UK session?

The supplied UK venues show several ways to try hot and cold rounds. Arc offers Guided Classes, Free Flow sessions and evening socials, with sauna, ice baths and a lounge. Its Free Flow format includes personal guidance while allowing you to move at your own pace.

Contrast Anerley offers a Finnish sauna, cold plunge pool and lounge in a private space. Sessions must be booked in advance. Towels, showers and changing rooms are listed among its facilities.

Wild Sauna Club describes a wood-fired horsebox sauna followed by a watering-can shower and cold plunge. Cwmdu Contrast offers guided sessions with exclusive use of its wood-fired sauna and ice baths. These formats differ, so look at the session description rather than assuming every booking follows the same timetable.

Questions people ask

Should you use the sauna or cold plunge first?
Most supplied routines start with the sauna. Ember says heat should always come first, while Polar Monkeys includes a cold-first evening variation. The sources do not agree on an absolute rule.
How long should a beginner stay in the cold plunge?
The guides differ: Ember suggests beginners can start with 20–30 seconds, while Polar Monkeys lists 60–120 seconds. Start shorter and warmer rather than treating the longer example as a target. Shorten the dip if your breathing becomes ragged.
Do you need a rest between rounds?
Both Ember and Psycle include rest, but their timings differ. Ember suggests 2–5 minutes after cold; Psycle describes 5–10 minutes between rounds. Use the pause to check how you feel before repeating.
Can you do a cold plunge alone?
Polar Monkeys advises against plunging alone, especially when you are new. It also advises avoiding breath holds in the cold and standing slowly.
Where can you try a guided sauna and cold plunge session?
Arc offers Guided Classes alongside Free Flow sessions. Cwmdu Contrast offers guided contrast sessions with exclusive use of its sauna and ice baths. These are different formats, so check the session description before booking.
Saunas with a cold plunge

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Sources