Vol. 1 · No. 4 · October 2026

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Sauna Monthly

The monthly read on heat, cold & recovery

Sauna Monthly

Department · 7 listings

Cold Plunge

A cold plunge is the other half of the Nordic cycle, and Scandinavians have alternated heat and cold for centuries. Modern tubs range from ice-and-water barrels to chiller-driven plunges that hold 3°C water in a heat wave. The research on deliberate cold is younger than the sauna literature, and so far its most interesting findings concern brown fat and thermogenesis.

Median start
$5,490
Cheapest
$1,150
Dearest
$14,599

List prices across 7 models, from the Sauna Price Index.

Browse the catalogue· 7 listings

Every listing in Cold Plunge

The Plunge (Original)

Plunge Cold Plunge

The Plunge (Original)

Electric120V Plug-InActive Chiller
$8,490
Plunge Air

Plunge Cold Plunge

Plunge Air

Electric120V Plug-InActive Chiller
$5,490
Plunge All-In Gen 2

Plunge Cold Plunge

Plunge All-In Gen 2

Electric120V Plug-InActive Chiller
$9,990
Winter swimmers at the edge of an ice hole in a frozen lake

The ScienceJuly 2026

Cold plunge and contrast therapy: how the Nordic hot-cold cycle works

Winter swimmers who alternate sauna and cold water show brown-fat and thermogenic adaptations. We lay out the Scandinavian hot-cold protocol and its gear.

“The winter swimmers in the study kept a modest habit of about 11 minutes of cold a week alongside regular sauna.”

InsideThe cold research found brown-fat changes in winter swimmers · Should you buy an ice barrel or a chiller tub? · Run the contrast protocol for two or three rounds

Read the article7 min
Ice Barrel 500

Ice Barrel Cold Plunge

Ice Barrel 500

Ice-Cooled
$1,74999

Contrast adaptation

Hot ⇄ cold

Young winter swimmers who paired cold dips with sauna showed enhanced cold-induced thermogenesis and altered brown-fat activity.

The fix: Run the Nordic cycle by following each sauna round with a cold plunge and a rest, then repeat it.

Cell Reports Medicine, 2021
Ice Barrel 300

Ice Barrel Cold Plunge

Ice Barrel 300

Ice-Cooled
$1,14999

From the screening room

Sauna, cold plunge, and your health: what the science says | Dr. Susanna Søberg & Tim Spector

Dr. Susanna Søberg & Prof. Tim Spector · ZOE

Susanna Søberg and epidemiologist Tim Spector weigh the evidence for sauna and cold plunge and say which findings hold up. They also give practical contrast-therapy guidance.

Sun Home Cold Plunge Pro

Sun Home Saunas Cold Plunge

Sun Home Cold Plunge Pro

Electric120V Plug-InActive Chiller
$14,599
Alaskan Cold Plunge Tub

Redwood Outdoors Cold Plunge

Alaskan Cold Plunge Tub

Ice-Cooled
$2,999

What helps

The contrast protocol

The Scandinavian habit researchers studied pairs brief, hard cold with regular heat. Keep your plunges close to that pattern.

Birch forest with white trunks lit by golden morning light

The ScienceJuly 2026

When to cold plunge so it doesn't blunt your strength gains

Three minutes of cold can sharpen a morning. Taken right after lifting, the same plunge can blunt the muscle adaptation you trained for, so timing decides whether it helps.

“Cold immersion right after strength training can blunt the signal that drives muscle adaptation, so keep hard lifting and hard cold a few hours apart.”

InsideIce baths after lifting can blunt hypertrophy · Cold shines for alertness and between competition bouts · Plan contrast sessions for evenings or rest days

Read the article6 min

The science

Why cold plunge? The science

A cold plunge is the other half of the Nordic cycle, and Scandinavians have alternated heat and cold for centuries. Modern tubs range from ice-and-water barrels to chiller-driven plunges that hold 3°C water in a heat wave. The research on deliberate cold is younger than the sauna literature, and so far its most interesting findings concern brown fat and thermogenesis.

  • Winter swimmers alternating cold dips with sauna showed enhanced cold-induced thermogenesis and altered brown-fat thermoregulation versus controls. · Cell Reports Medicine, 2021

  • The swimmers' habit was modest, with cold exposure on the order of 11 minutes a week along with regular sauna. · Cell Reports Medicine, 2021

  • Cold immersion spikes blood pressure and heart rate for a short time, and medical guidance suggests caution for anyone with a cardiovascular condition. · The American Journal of Medicine, 2001

Common questions

Do I need a chiller for a cold plunge, or is ice enough?
Ice works. A barrel plus a few bags gets you to 5–10°C. With a chiller, the water stays filtered and sanitized at your set temperature every day, and you never make an ice run. If you plunge daily, that consistency is worth the chiller's price.
How cold and how long?
The studied protocols kept the cold brief and hard, at around 1–3 minutes in 5–15°C water. Start warmer and shorter than that, and always plunge with someone who knows you're in the water.

Sources

  1. Altered brown fat thermoregulation and enhanced cold-induced thermogenesis in young, healthy, winter-swimming men · Cell Reports Medicine (2021)
  2. Benefits and risks of sauna bathing · The American Journal of Medicine (2001)

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