Cold Plunge SafetyUpdated an hour ago
The one rule you must never break. Turn your chiller off and unplug it before you get in the water. Never plunge while the chiller is running.
Temperature and session time
| Experience | Water temperature | Session length |
|---|---|---|
| Beginner | 15–18°C (59–64°F) | 1–3 minutes |
| Intermediate | 8–12°C (46–54°F) | 3–10 minutes |
| Any level | Any | 15 minutes maximum |
Lower the temperature gradually over several sessions. Colder and longer isn’t better, and staying in past 15 minutes increases the risk of hypothermia at any level.
Getting in
- Get in slowly, using a step or the tub edge for support. Cold water slows your reactions and coordination.
- Expect the cold shock response: a sharp gasp, fast breathing and a racing heart in the first 30–90 seconds. It’s normal. Focus on slow, steady breaths out and let it pass.
- Keep your head above water. Don’t hold your breath or do intense breathwork while you’re in the tub.
Get out straight away if you notice:
- uncontrollable shivering
- skin turning white, blue or grey
- numbness that spreads, or loss of feeling in your hands or feet
- confusion, slurred speech or clumsiness
- chest pain, palpitations or dizziness.
Warming up afterwards
- Dry off and put on warm clothes straight away.
- Warm up naturally with light movement for 5–10 minutes before a warm shower. Avoid going straight into a very hot shower, as the sudden change can make you light-headed.
- Shivering for a few minutes afterwards is normal. Shivering that gets worse, or doesn’t settle within 30 minutes, isn’t. Seek medical advice.
Keeping your plunge safe
- Place your tub on a flat, stable surface that can take its full weight when filled.
- Keep the area around the tub dry to prevent slips.
- Use a lid or cover when you’re not using it, especially around children and pets.
- Clean water matters for your health as well as your chiller. See Cold Plunge Water Maintenance.