The Dopamine Effect: Why the Ice Bath Makes You Feel So Good

If you've done a cold plunge at Suelta, you know the feeling. The moment you step out, there's a warmth that washes over you — not physical heat, but a kind of electric calm. A clarity. What Suelta guests call "the Suelta effect" has a very real neurochemical name: it's dopamine.

Stanford neuroscientist Dr. Andrew Huberman has spent years studying the effects of deliberate cold exposure on the brain and body. His findings explain exactly why that post-plunge glow is so powerful — and why people keep coming back.

What happens in your brain during cold immersion

When you step into the ice bath, your sympathetic nervous system fires immediately. Cold receptors in the skin send a rapid signal to the brain, triggering the release of epinephrine (adrenaline) and norepinephrine. These catecholamines spike your heart rate, sharpen attention, and produce an immediate sense of alertness.

But here's where it gets remarkable: cold exposure also causes a prolonged release of dopamine — one of your brain's primary reward molecules. Unlike most stressors, this isn't a brief spike that crashes. Research cited by Huberman shows the elevated dopamine can last for hours after even a short cold plunge.

Huberman's protocol

Dr. Huberman recommends a total of just 11 minutes of cold immersion per week, split across 2–4 sessions of 1–5 minutes each. The water should be uncomfortably cold but safe to stay in — which is exactly the range Suelta's ice baths are maintained at (4–9°C).

Building mental resilience, one plunge at a time

Huberman describes the experience of staying calm in cold water as "top-down control" — your prefrontal cortex overriding the panic signals from deeper, more primitive brain circuits. Each session is a rep for your stress-response system.

"By forcing yourself to embrace the stress of cold exposure as a meaningful self-directed challenge, you exert top-down control over deeper brain centers that regulate reflexive states. That's the basis of what people call resilience and grit." — Dr. Andrew Huberman

Over time, people who practice deliberate cold exposure regularly report improvements in stress tolerance, focus, emotional regulation and mood — well beyond the plunge itself.

Getting the most from your Suelta plunge

Huberman specifically recommends cold immersion up to the neck for maximum effect — which is exactly how the Suelta ice baths are designed. He also suggests moving your limbs gently once in the water, which breaks up the thermal insulation layer that forms around your body, making the exposure more effective.

And that floaty, calm, slightly euphoric feeling after you get out? Sit with it. That's your dopamine doing exactly what the science says it should.

Sources & Further Reading

→ Huberman Lab — Cold Exposure Newsletter: https://www.hubermanlab.com/newsletter/the-science-and-use-of-cold-exposure-for-health-and-performance

→ Huberman Lab — Cold Plunges & Deliberate Cooling: https://www.hubermanlab.com/topics/cold-plunges-and-deliberate-cooling