Cold Shower and Ice Bath Compared
A plain, no-winner comparison of cold showers and ice baths: what trials and reviews found, how the risks differ, and why this page gives no temperature or time advice.
Content last updated . This page has not been medically reviewed.
Safety first. Sudden cold water on the skin triggers an involuntary gasp, which can lead to inhaling water. [1] Cold immersion has a cold shock response that begins within seconds. [2] Never do cold immersion alone, near deep water, after alcohol, or with a heart condition without medical advice. If someone collapses or struggles in water, call 911 (US). This page gives no temperature, time or "challenge" advice, and no breath-holding or hyperventilation instructions.
Side by Side
| Question | Cold shower | Ice bath or cold immersion |
|---|---|---|
| Best-known trial or review | A Dutch trial of 3,018 adults randomized to 30, 60 or 90 seconds of cold at the end of a daily shower, or a control, for 30 days, then optional continuation [3] | A Cochrane review of 17 small trials, 366 people, using water below 15 degrees C after exercise; study quality was low [4] |
| Illness | 29% reduction in self-reported sickness absence, but no significant change in illness days; no related serious adverse events reported [3] | Proper evidence not found in the sources read |
| Muscle soreness | Proper evidence not found | Some evidence of less soreness than rest [4] |
| Mood and stress | A 2026 review of cold showers, immersion and winter swimming together said evidence does not establish benefit [5] | Same review [5]; a 2025 review found a stress reduction at 12 hours but not at other times [6] |
| Main risk | Gasp reflex on sudden cold [1]; not studied head-to-head with immersion | Cold shock, swimming failure, hypothermia and collapse around rescue in open-water settings [2] |
| Evidence label | Promising but limited (self-reported outcomes) | Mixed |
Reading the Trials Fairly
Cold showers cannot be blinded. In the Dutch trial, outcomes were self-reported, and the conflict-of-interest statement names one author's employer, Achmea. [3] A 2025 review of cold-water immersion (7 to 15 degrees C, 30 seconds to 2 hours, mostly baths, one shower study) found an acute rise in an inflammation measure, and said the evidence base has few randomized trials and small samples. [6] In soccer players, neither cold nor hot immersion beat a sham placebo for recovery. [7]Where Else to Read
Cold plunge and ice bath evidence is covered by the Biohacking section: Cold-water immersion summary, Cold and heat exposure and safety with temperature exposure. On this site: Cold showers: what research shows, Cold shock and hypothermia and Hydrotherapy safety. Wim Hof-style breathing in or near water is not covered as practice; see its safety warnings.Which Should I Choose?
Neither is a treatment, and neither is proven to build immunity. If you are curious, talk with a clinician first, especially with heart disease, high blood pressure, arrhythmia, pregnancy or other circulation problems. Stop if you feel unwell.Frequently asked questions
Is a cold shower as good as an ice bath?
Not studied head to head in the sources we read. Evidence for each is limited and measures different things. [3][4]
Does a cold shower boost immunity?
In one trial, cold showering reduced self-reported sickness absence but not illness days. [3] See the immunity claim check.
Which is safer?
We did not find a source that ranks them. Cold shock is described for immersion. [2] A cold shower also triggers a gasp. [1] Neither is risk-free.
Can cold water help depression or anxiety?
A 2026 review said the evidence does not establish this, and cold exposure should not be seen as a standalone treatment for psychiatric disorders. [5] In the US, 988 is the Suicide and Crisis Lifeline.
Who should avoid both?
People with heart or circulation conditions, and anyone unsure, should ask a clinician. See preparing for hydrotherapy.
References
- Met Office. Cold water shock: what it is and how to stay safe. Read 2026-10-22.
- Leuci L et al. Beyond hypothermia: mechanisms of death, rescue, and prevention in cold water immersion. J Appl Physiol (2026). PubMed record. Read 2026-10-22.
- Buijze GA et al. The effect of cold showering on health and work: a randomized controlled trial. PLoS One (2016). PubMed record. Read 2026-10-22.
- Bleakley C et al. Cold-water immersion (cryotherapy) for preventing and treating muscle soreness after exercise. Cochrane Database Syst Rev (2012). PubMed record. Read 2026-10-22.
- Ngandeu Schepanski S et al. Cold-water exposure and psychological outcomes in adults: systematic review and meta-analysis. Front Physiol (2026). PubMed record. Read 2026-10-22.
- Cain T et al. Effects of cold-water immersion on health and wellbeing: systematic review and meta-analysis. PLoS One (2025). PubMed record. Read 2026-10-22.
- Gustafsson J et al. Cold- and hot-water immersion are not more effective than placebo for recovery in national level soccer players. Eur J Appl Physiol (2025). PubMed record. Read 2026-10-22.