Benefits of cold water immersion
Cold water therapy has been used for centuries, from Nordic lakes to Japanese bathhouses. Modern research is now explaining why it feels so good.
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An instant lift in mood and energy. Cold water triggers a sharp rise in noradrenaline and dopamine, the brain chemicals linked with alertness, focus and mood. Studies have measured these rises lasting well after you leave the water.
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Calm under pressure. Learning to breathe slowly through the first cold shock trains your body to stay composed. Many people find everyday stress feels easier to handle with regular practice.
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Faster recovery. Cold water may reduce muscle soreness after exercise, which is why elite athletes use it routinely.
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Circulation. Cold narrows blood vessels; rewarming opens them again. Moving between heat and cold gives your circulation a workout.
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Bright skin and hair. Cold water tightens the skin’s surface and leaves a fresh, healthy glow.
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Support through midlife. In a large 2024 University College London survey of women who swim in cold water, many reported fewer anxiety symptoms, mood swings and hot flushes during perimenopause and menopause. The research is early, but encouraging.
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Stronger together with heat. Research on regular winter bathers suggests a weekly target of about 11 minutes in cold water, split across short dips and combined with sauna. This hot–cold rhythm is what Agni-Jal is built around.
Our plunge pool is a properly equipped plunge pool, and is installed in place by Spazio Design London, a team that has built pools for over 25 years.
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Precise temperature. A dedicated chiller holds the water anywhere from 3°C to 12°C, so beginners and seasoned plungers each get the cold they need.
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Crystal-clear water. Continuous filtration and [UV / ozone] sanitisation, managed to professional pool-water standards, so the water stays fresh for every member.
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Full immersion. Depth to submerge comfortably to the neck [confirm depth], with steps and a handrail for a calm, controlled entry.
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Built in acrylic. Smooth, beautiful and hygienic.
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Seconds from the heat. Placed steps from the saunas, so contrast therapy flows naturally.
Your first plunge, step by step
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Warm up first in the Finnish sauna or infrared sauna.
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Start at 12°C for 30–60 seconds. Colder and longer can come later.
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Enter slowly and breathe out long and slow through your mouth. The gasp passes within 30 seconds.
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Submerge to the neck, keeping your head above water.
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Step out, dry off and rest in the relaxation lounge. Let your body rewarm naturally; don’t rush to a hot shower.
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Repeat with each round of heat.
A host will be with you for your first plunge. Prefer to ease in? A cold shower is always available as a gentler start.
Is the cold plunge right for me?
Cold water is a powerful stimulus. Please consult your GP before plunging if you are pregnant, have a heart condition, high blood pressure, Raynaud’s syndrome, cold urticaria or epilepsy. Never plunge after alcohol, never hold your breath underwater, and always get out if you feel numb or unwell.
Frequently asked questions
How cold is the plunge pool?
We can set it between 3°C and 12°C. Beginners start at around 12°C.
How long should I stay in?
30 seconds to 2 minutes per dip. Aim for about 11 minutes of cold in total across the week.
Is a cold plunge the same as an ice bath?
The effect is similar, but our plunge is chilled, filtered and sanitised like a pool, so the temperature is exact and the water is always clean.
Do I have to go in the plunge?
Not at all. Use the cold shower instead, or skip the cold entirely. Your ritual is yours.
Should I plunge before or after the sauna?
After. Heat first, then cold, then rest. Finish on cold or warmth as you prefer.