How to dose cold.
Six protocols based on published trials — beginner intro, Søberg minimum, daily reset, recovery, Wim Hof, contrast. With the temperatures, durations and frequencies that actually deliver.
Protocol 01
Beginner intro — the first three sessions
Temperature
10°C → 4°C
Duration
30s → 90s → 2–3 min
Frequency
1–3 days apart
Total dose
3 sessions over ~1 week
Three structured sessions designed to build cold tolerance, learn breathing under stress, and discover your personal response without overcommitting.
Session 1. 30–60 seconds at 10–12°C, Guided Fire & Ice or Wellness Experience at Kelham. Facilitator coaches you through breathwork before entry. Get in, breathe, exit before fatigue. You're learning your response, not chasing duration.
Session 2. 90 seconds at 8–10°C. Same setup, slightly colder, slightly longer. Notice the difference from session 1 — the autonomic system adapts fast.
Session 3. 2–3 minutes at 4–8°C. The working dose. By now you're comfortable with the cold shock response and can stay focused on breathing rather than reacting. This is what regular practice looks like.
Space these out by 24–48 hours. After session 3, daily plunges are fine.
Protocol 02
Søberg Minimum — sustained metabolic adaptation
Temperature
4–7°C
Duration
2–3 min per session
Frequency
4–5× per week
Total dose
11 min/week total immersion
The most-cited dose recommendation in cold therapy — sustains brown adipose tissue activation, supports insulin sensitivity, and delivers the broader benefit envelope.
Søberg et al. (2021, Cell Reports Medicine 2: 100408) identified roughly 11 minutes per week of total immersion at 4–7°C as the minimum dose to sustain BAT activation and metabolic adaptation in habituated practitioners. Spread across 4–5 sessions = ~2–3 minutes each.
End on cold (not heat) for maximum BAT activation effect (the Søberg sequencing principle). If using contrast therapy, finish with the cold plunge rather than the sauna.
Stack: Pair with morning breathwork for the strongest cognitive after-effect. Avoid within 4 hours of heavy strength training. Track resting heart rate and sleep weekly — both typically improve through consistent practice.
Protocol 03
Daily Reset — mood and focus
Temperature
4–12°C
Duration
1–2 min per session
Frequency
Daily
Total dose
7–14 min/week
Short, frequent cold exposure focused on the dopamine and mood signal. Easier to sustain than longer sessions and arguably better for daily cognitive performance.
Shorter sessions, higher frequency. The dopamine and norepinephrine response saturates around 2–3 minutes, so 1–2 minute plunges capture most of the acute signal with minimal time commitment.
Best timing: Morning, ideally before deep work. The dopamine elevation peaks 30–90 minutes post-exit — align with the cognitive demands of your day.
Why it works for sustained practice: A 90-second daily commitment is much easier to maintain than 3-minute alternate-day sessions. Habits form on frequency, not heroics. Members on this protocol report the steadiest mood improvements.
Protocol 04
Recovery — the Bleakley 11/11/11
Temperature
11–15°C
Duration
11–15 min
Frequency
Within 24h of training
Total dose
Per session, not per week
The post-exercise cold-water immersion protocol with the strongest meta-analytic support for DOMS reduction and perceived recovery.
Bleakley et al. (2012, Cochrane Database) meta-analysed 17 trials of post-exercise CWI. The optimum protocol: 11–15°C for 11–15 minutes within 24 hours of training. Reduces DOMS, accelerates perceived recovery, and supports next-day performance.
The strength-training caveat: Roberts et al. (2015) showed this protocol within an hour of strength training attenuates muscle hypertrophy by suppressing mTOR signalling. Separate cold from heavy lifting by 4+ hours, or use on rest days, if hypertrophy is your goal.
Best for: Endurance recovery, competition recovery, sport-specific training (cycling, running, team sports). The temperatures here are warmer than the Søberg metabolic protocol — recovery benefits don't need extreme cold.
Protocol 05
Wim Hof Method — cold + breathwork
Temperature
10°C
Duration
3 min cold + 20 min breathwork
Frequency
2–3× per week
Total dose
Skill-building over weeks
The structured combination of hyperventilatory breathwork (on land, before cold) and cold exposure. Modulates inflammatory response per the Kox 2014 RCT.
The structure: Phase 1: 20 minutes of structured WHM breathwork on land (30–40 deep breaths, breath hold, repeat 3 rounds). Phase 2: 3 minutes cold immersion at 10°C. Phase 3: rewarming and reflection.
Critical safety note: NEVER do Wim Hof breathing in or near water. The hypoxia risk is real and people have died from shallow-water blackout. Breathwork is always on land, on solid ground, completed before the cold immersion begins. The breath hold must happen with your head fully out of the water.
Best learned guided: Book Guided Fire & Ice or a Wellness Experience for the first WHM attempts. Once you've been coached on safe breathwork structure, you can practice it solo.
Protocol 06
Fire & Ice — contrast therapy
Temperature
Hot 80°C → Cold 4–10°C
Duration
10–15 min hot → 1–3 min cold
Frequency
1–3× per week
Total dose
3–4 cycles per session
Alternating hot and cold exposure in structured cycles. The thousand-year Finnish/Russian tradition, validated by modern circulatory and recovery science.
The structure: 10–15 min sauna or infrared at 70–90°C → 1–3 min cold plunge at 4–10°C → 5 min rest. Repeat 3–4 times. End on cold (BAT focus) or heat (sleep focus) depending on goal.
The mechanism: Vasodilation in heat, vasoconstriction in cold, repeated — produces a strong circulatory pumping effect that improves venous return, lymphatic drainage, and microcirculation. Combined with the individual effects of each modality.
At R1SE: The Guided Fire & Ice service is built around this protocol. A facilitator coaches the cycles, manages timing, and helps you stay in the productive zone (not pushing toward heat exhaustion or cold-shock distress).
Inside the plunge
The technique under every protocol.
Breathing under cold stress
The single most important skill. Long, slow nasal exhales. Don't try to control the inhale — it will be reactive at first. Just slow the exhale. Three-second inhale, six-second exhale, repeat. After 60 seconds the response settles.
Pre-plunge: 2–3 minutes of box breathing (4-4-4-4) or slow nasal breathing primes the nervous system. On guided sessions a facilitator coaches this.
On entry: long exhale as you step in — conscious, deliberate, through pursed lips. The cold-shock response wants you to gasp and breathe rapidly; doing the opposite helps you skip the worst.
Safety: NEVER do hyperventilatory (Wim Hof-style) breathwork in or near water. Land only, completed before water entry.
Temperature and time tradeoff
Colder water requires shorter time for the same physiological dose. Roughly: 2 min at 4°C ≈ 4–5 min at 10°C. This is why the various protocols have different temperature/duration combinations.
For metabolic adaptation (Søberg): 4–7°C is required. Warmer water doesn't activate BAT meaningfully.
For recovery (Bleakley 11/11/11): 11–15°C is optimal. Colder doesn't add benefit and increases discomfort.
For mood/dopamine: 4–12°C all works. The catecholamine surge scales with temperature drop, but the differences across this range are modest.
Hydration and exit
Pre-plunge: 250–500ml water 30 minutes before. Avoid heavy meals within 90 minutes. Skip caffeine if particularly sensitive.
Post-plunge: Don't shower immediately. Let the parasympathetic rebound unfold. Towel off, get dressed warmly, sit quietly for 5–10 minutes. Drink water. Eat normally.
The 30–60 minute post-exit window is when the dopamine elevation peaks. Plan for it — this is your most productive cognitive window.
Common questions
Match the protocol to the goal.
Our team will recommend a starting protocol and adjust as you progress.
Continue Reading
More from the R1SE Ice Bath Library
Ice Bath Knowledge Hub
Every cold-therapy page on the R1SE knowledge library.
ReadThe Science of Cold
Catecholamines, brown fat, immunity, mood — every claim cited.
ReadThe Benefits of Cold
Metabolism, mood, immunity, recovery, focus, resilience.
ReadMethods: Wim Hof, Contrast, Søberg
Which approach suits which goal.
ReadConditions Cold Helps
Depression, inflammation, insulin sensitivity, recovery.
ReadTypes of Cold Exposure
Ice bath vs cold shower vs cryotherapy vs cold-water swim.
Read