Key takeaways
- Early 2025 research suggests structured breathwork and cold-water immersion may support stress resilience and mood.
- The evidence base is young: many studies are small, short-term or mixed in quality.
- We treat these as promising, not proven, labelled Emerging, with no cure claims.
- Screening matters: cold exposure is not safe for everyone (for example, certain heart conditions or pregnancy).
Emerging Few wellbeing practices have grown as fast as breathwork and cold-water immersion. The enthusiasm is understandable, and the research is starting to catch up. But there is a difference between "promising early evidence" and "proven", and being honest about that gap is exactly what a credible health organisation should do.
What the recent research suggests
A 2025 systematic review and meta-analysis of cold-water immersion found signals that it may influence stress and wellbeing markers, while being clear about the limitations of the underlying studies.[1] A 2025 semi-randomised controlled trial published in Scientific Reports looked at breathwork combined with cold immersion and reported measurable effects on some outcomes.[2] A separate case-control study of combined cold immersion and breathwork pointed in a similar direction.[3]
Why we say "emerging", not "established"
Read past the headlines and a familiar pattern appears: sample sizes are often small, follow-up is short, and study quality varies. Reviewers themselves call for larger, longer and better-controlled trials.[1][4] That does not mean the practices don’t work. It means the evidence is not yet strong enough to make firm promises, so we don’t.
Promising is not the same as proven. We offer these practices because early evidence is encouraging and participants value them, and we label them honestly.
Safety comes first
Cold exposure places real demands on the body. It is not suitable for everyone, for example, people with certain heart conditions, or during pregnancy. That is why every cold-water and intensive-breathwork session at Sorrel Sanctuary includes health screening, clear guidance and trained facilitation. The goal is benefit without avoidable risk.
How to read claims about breath and cold
If a provider tells you cold water "cures" anxiety or "boosts your immune system" as settled fact, be cautious, the science does not support that certainty yet. A trustworthy version sounds more like this: early research is promising, the practice is enjoyable and calming for many people, and it is offered safely with screening. That is the version we stand behind.
A note on wellbeing. If you are dealing with anxiety, low mood or another mental-health difficulty, please speak with your GP or a qualified professional about the right support for you. Breathwork and cold exposure are not a treatment for mental illness.
Evidence tiers on this page: Established means well-supported by high-quality research; Emerging means promising but with a young evidence base. See our full Science & Safety page.