Screening & safety
No clearance, no water.
There are no exceptions.
Cold exposure carries real cardiovascular load. The screening exists to find risk before, not after — and a trained supervisor stays on the deck for every session.
The screening process
- 01
Health questionnaire
You complete a structured questionnaire covering cardiac history, medications, and known contraindications. A clinician reads every one — not a bot.
- 02
Cardiac screen
Our partnering cardiologist reviews your questionnaire and screens for cardiovascular risk before any immersion is booked.
- 03
A clear yes or no
We tell you plainly whether cold exposure is safe for you. If it isn't, we say so — and we do turn people away.
Who is typically not cleared
- Uncontrolled hypertension
- Certain arrhythmias
- Recent cardiac events
- Raynaud's phenomenon
- Cold urticaria
- Pregnancy
This list is not exhaustive. The cardiac screen exists precisely to catch what a checklist can't.
Supervision, every session
A trained supervisor stays on the deck for the entire immersion and monitors your response. We watch heart rate and breathing, and we end a session early if your body says so. Cold is a tool — we treat it like one.
Questions,
answered plainly
Do I need medical clearance before starting?
Yes. Every client completes a health questionnaire and a cardiac screen with our partnering cardiologist before the first immersion. No clearance, no water. There are no exceptions.
Who should not do cold-exposure therapy?
People with uncontrolled hypertension, certain arrhythmias, recent cardiac events, Raynaud's, cold urticaria, or who are pregnant are typically not cleared. The screening exists to find these before, not after, and we do turn people away.
How cold is the water and how long do I stay in?
The protocol starts around 12 degrees Celsius for short, supervised exposures and progresses over eight weeks. Every temperature and duration is written into your program; nothing is improvised or pushed past your tolerance.
What exactly do you measure?
Resting heart rate, heart-rate variability, perceived recovery, and adherence. You see your own trend lines on a dashboard so the result is data you can read, not a feeling you have to take on faith.
Is there real evidence behind this, or is it a trend?
There is moderate evidence for reduced inflammation and short-term mood lift, and weaker evidence for the bigger claims. Our evidence page summarizes the studies honestly, including where the research is thin.
Is a supervisor present during immersions?
Always. A trained supervisor stays on the deck for every session and monitors your response. Cold exposure carries real cardiovascular load, and we treat it that way.