Ice baths: every question answered at a glance
In diesem Artikel
The questions are sorted by question word. Every answer starts with what matters most, and numbers carry their source in the same sentence. Where something is not proven, we say so.
What is an ice bath, and what happens?
What is an ice bath?
An ice bath is a short bath in very cold water, usually 3–15 °C for two to five minutes. Whether the water is cooled with ice, by a lake or by a chiller makes no difference. More: Ice baths at home
What happens in the body during an ice bath?
In the first one to three minutes the body reacts with cold shock: breathing, heart rate and blood pressure rise and stress hormones are released. In one lab study noradrenaline was 530 % higher after an hour in 14 °C water, but an hour is far longer than any normal ice bath (Šrámek et al., 2000). More: Ice baths in the morning
What do I need for an ice bath at home?
You need a tub you can sit in up to your shoulders, water that is cold enough and stays cold, a thermometer and a timer. The tub can be your bathtub, a barrel or an inflatable ice bath. More: Ice baths at home
What does an ice bath with ice cost?
A bathtub needs around 20–25 kg of ice, so at about €1 per kilo that is around €23 per bath. At three baths a week that adds up to more than 3,500 kg of ice a year. More: Ice or chiller
What do I do after an ice bath?
Dry off, dress warmly and move for a few minutes so your body produces its own heat again. A hot shower right afterwards is a matter of taste.
Why ice baths?
Why do you feel calmer after an ice bath?
After the brief cold shock the body settles again, and many experience that moment as a clear head. In a review of eleven studies, people reported less stress for up to about 12 hours after cold-water immersion, with no measurable effect on overall mood (Cain et al., 2025). More: Winding down with cold
Why do you shiver after an ice bath?
Shivering is how the body produces heat through muscle work. Mild shivering while warming up is normal, strong shivering in the water is your signal to get out.
Why are ice baths so popular right now?
Because they are short, feel noticeable right away and fit easily into daily life. Part of the interest comes from sport, where cold-water baths have been used for recovery for years.
11 min
in the cold per week for experienced winter swimmers, spread over several baths
Søberg et al., 2021
Observation
12 h
participants reported less stress after cold-water immersion
Cain et al., 2025 (11 studies)
Early evidence
~5
short baths until cold shock becomes measurably weaker
Tipton et al., 2000
Well established
How long, how cold and how often?
How long should an ice bath last?
Two to five minutes is enough for most people, one to two to start. Longer baths in very cold water raise the risk of hypothermia without any proven extra benefit. More: Temperature and duration
How cold should an ice bath be?
12–15 °C to start, 3–10 °C with experience. After exercise, water of 11–15 °C showed the clearest effect on muscle soreness in a meta-analysis, and colder was not better (Machado et al., 2016).
| Experience | Temperature | Duration |
|---|---|---|
| Beginner | 12–15 °C | 1–2 minutes |
| Intermediate | 8–12 °C | 2–4 minutes |
| Experienced | 3–8 °C | 2–5 minutes |
These are guide values from experience, not medical advice.
How often per week?
Two to three times a week is a common rhythm. The Copenhagen winter swimmers reached about 11 minutes of cold per week this way; that describes their habit and is not a proven minimum dose (Søberg et al., 2021).
How do I start with ice baths?
Start at 12–15 °C for one to two minutes, get in calmly and breathe out slowly. Extend the time first, then lower the temperature by one to two degrees per week. More: Your first ice bath in 6 steps
How do I breathe in an ice bath?
In the first minute the body wants to gasp, so breathe out for longer than you breathe in, about four seconds in and six seconds out. If you stay calm in the first minute, the bath feels far more relaxed.
How quickly do you get used to the cold?
Faster than most people expect: after about five short baths, breathing and heart rate react much more calmly in the first minute. In a study at the University of Portsmouth this effect was still measurable months later (Tipton et al., 2000).
When to take an ice bath?
Ice bath in the morning or evening?
If you use the cold to wake up, bathe in the morning; if you want to wind down, bathe in the evening with some time before sleep. No study has compared the two directly yet. More: Morning or evening
Right after training or later?
For recovery after hard training, right afterwards: in a meta-analysis, strength and power were better restored 24 hours later than with passive recovery (Moore et al., 2022). If building muscle is your goal, leave a gap after strength sessions, as one study found smaller gains otherwise (Roberts et al., 2015). More: Ice baths after training
When to take an ice bath after the sauna?
After each sauna round, step outside briefly, then one to three minutes in the ice bath, then rest. Do not jump straight from the sauna into the water. More: Ice baths after the sauna
When should I get out?
Immediately if you shiver strongly, feel dizzy, lose control of your breathing or your fingers and feet go numb. The first time, better too early than too late.
Who should and should not take an ice bath?
Who should not take an ice bath?
Anyone with heart or circulatory disease, high blood pressure, heart rhythm disorders or Raynaud's syndrome, or who is pregnant, should speak to a doctor first. Cold shock puts strain on the heart and circulation in the first minute.
Can children take ice baths?
There are no reliable studies on this; ice baths are a ritual for adults. For children, please speak to a paediatrician first.
Are ice baths suitable for older people?
That depends on health, not age alone. Because heart and circulatory conditions become more common with age, check with a doctor first and start with warmer water.
Where to take an ice bath?
Can I use my bathtub as an ice bath?
Yes, any bathtub works as long as you can sit in it up to your shoulders. With a water chiller like the pool.down Tower your first ice bath is ready in about 60 minutes, with no ice and no installation.
Where can I take an ice bath at home?
In the bathtub, a barrel or an inflatable tub on the balcony, terrace or in the garden. Outdoors, the tub needs a firm surface and electrical devices need a suitable outdoor socket.
Are ice baths healthy? The yes-or-no questions
Are ice baths healthy?
Some effects are well supported, such as less muscle soreness after hard training (Moore et al., 2022), others only have early evidence or none. An ice bath is a ritual, not a treatment, and it does not replace medical advice.
Do ice baths strengthen the immune system?
That is not proven. In the largest study on cold showers so far, with 3,018 participants, those who showered cold reported 29 % fewer sick days off work, but they were not ill less often (Buijze et al., 2016).
Do ice baths help with weight loss?
That is not proven. Cold briefly raises energy use, but studies on lasting weight loss from ice baths are missing.
Do ice baths help with stress?
There is early evidence for a short-term effect: in a review of eleven studies, people reported less stress for up to about 12 hours after cold-water immersion (Cain et al., 2025). Lasting stress reduction is not proven. More: Winding down with cold
Does an ice bath slow muscle growth?
Possibly, if it regularly follows strength training straight away: in a twelve-week study the ice bath group built less muscle and strength (Roberts et al., 2015). With a gap after strength sessions there is nothing against it. More
Can you take an ice bath with a cold?
Better not while you feel ill or have a fever, because the cold puts extra load on your circulation. Wait until you feel well again.
Is a daily ice bath useful?
No extra benefit over two to three baths a week has been shown. If you bathe daily, keep the baths short and pay attention to how your body reacts.
What studies show
- Less muscle soreness and faster recovery after hard training
- Less perceived stress, for a few hours
- Cold shock weakens quickly with practice
What is (not yet) proven
- A stronger immune system
- Lasting weight loss
- A longer life
Are ice baths dangerous?
For healthy people a short, calm ice bath is manageable, but cold shock in the first minute strains the heart and circulation. If you have heart or circulatory disease, high blood pressure, heart rhythm disorders, Raynaud's syndrome, are pregnant or have other conditions, speak to your doctor first. Do not jump in, do not submerge your head, do not bathe after alcohol and not alone if you are unsure. This article does not replace medical advice.
Frequently asked questions
Is 15 °C already an ice bath?
For beginners, yes. 15 °C feels clearly cold across the whole body and already triggers the typical cold response.
Is a cold shower just as good?
A cold shower is a good start. In an ice bath the whole body is in cold water at once, so the response is usually much stronger.
Does my head need to go under?
No, and especially at the start it is not recommended. Up to your shoulders is enough.
Sources
- Søberg S et al. (2021): Altered brown fat thermoregulation and enhanced cold-induced thermogenesis in young, healthy, winter-swimming men. Cell Reports Medicine 2(10), 100408.
- Cain T et al. (2025): Effects of cold-water immersion on health and wellbeing: A systematic review and meta-analysis. PLOS ONE 20(1), e0317615.
- Moore E et al. (2022): Impact of Cold-Water Immersion Compared with Passive Recovery Following a Single Bout of Strenuous Exercise on Athletic Performance in Physically Active Participants: A Systematic Review with Meta-analysis and Meta-regression. Sports Medicine 52, 1667–1688.
- Machado AF et al. (2016): Can Water Temperature and Immersion Time Influence the Effect of Cold Water Immersion on Muscle Soreness? A Systematic Review and Meta-Analysis. Sports Medicine 46, 503–514.
- Roberts LA et al. (2015): Post-exercise cold water immersion attenuates acute anabolic signalling and long-term adaptations in muscle to strength training. The Journal of Physiology 593(18), 4285–4301.
- Buijze GA et al. (2016): The Effect of Cold Showering on Health and Work: A Randomized Controlled Trial. PLOS ONE 11(9), e0161749.
- Tipton MJ, Mekjavic IB, Eglin CM (2000): Permanence of the habituation of the initial responses to cold-water immersion in humans. European Journal of Applied Physiology 83, 17–21.
- Šrámek P et al. (2000): Human physiological responses to immersion into water of different temperatures. European Journal of Applied Physiology 81, 436–442.
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