The Huberman Cold Exposure Protocol, Explained

Andrew Huberman is a neuroscience professor at Stanford who's done more than anyone to make cold exposure mainstream. his Huberman Lab podcast episodes on deliberate cold exposure are probably the most cited source in the cold plunge community.

the protocol he describes is simple, evidence-based, and designed for normal people. not just extreme athletes or Wim Hof devotees. here's exactly what it involves.

The core protocol

Why "end on cold" matters

this is the bit most people get wrong. after a cold plunge or cold shower, the natural instinct is to jump in a hot shower or wrap up in a warm towel immediately.

Huberman explains that the dopamine and metabolic benefits are maximised when you let your body rewarm itself. the process of shivering and generating your own heat is what triggers brown fat activation and extends the neurotransmitter response.

practically, this means: get out of the cold water, towel off, get dressed, and let your body handle the rest. you'll feel cold for 5-10 minutes, then a warm glow kicks in. that's the good stuff.

Cold shower vs ice bath vs cold plunge

Huberman has said all of these work, but the dose differs:

• cold shower (end of shower): easiest entry point. turn it to full cold for the last 1-3 minutes. less intense but still triggers a meaningful catecholamine response.
• cold water immersion (bath, plunge, natural water): more intense. full body immersion means more surface area contact, bigger response. this is what the research primarily studies.
• contrast therapy (hot-cold alternating): fine for recovery, but for the dopamine benefits, end on cold. hot-cold-hot negates some of the effect.

Temperature guidance

Huberman doesn't prescribe an exact temperature because individual cold tolerance varies a lot. instead, he uses the guideline: "uncomfortably cold, but safe."

for most people, this means:

• beginner: 15-18C. Cold enough to gasp, but you can stay in for a couple of minutes without panic.
• intermediate: 10-15C. Proper cold. You'll want to get out. The mental challenge is real.
• advanced: 5-10C. This is ice bath territory. Don't start here.

Timing and frequency

the 11 minutes per week number comes from a meta-analysis Huberman cites, looking at studies that found health benefits from cold water immersion. 11 minutes of total cold exposure per week, spread across multiple sessions, seemed to be the threshold for consistent benefits.

more is not necessarily better. there's no evidence that doing 30 minutes per week gives you more benefits than 11 minutes. and there's some evidence that excessive cold exposure can impair recovery from exercise.

a practical schedule might look like:

• Monday: 3 minutes cold shower
• Wednesday: 3 minutes cold shower
• Friday: 3 minutes cold shower
• Saturday: 2 minutes (optional bonus)

What about Wim Hof?

Wim Hof's method combines cold exposure with specific breathing exercises and meditation. Huberman's protocol is cold exposure on its own, without the breathing component.

both are valid approaches. the key difference is that Huberman's protocol is simpler and more accessible. you don't need to learn a breathing technique first. you just need cold water and a timer.

that said, many people (including me) combine elements of both. the Wim Hof breathing before a cold plunge does seem to help manage the initial shock. but the cold exposure benefits happen regardless of whether you do the breathing.

Why I built ColdTimer

I built ColdTimer because I kept losing track of my weekly minutes. I'd do cold showers but couldn't remember if I'd hit my 11 minutes that week. or I'd skip a few days and not realise I'd gone a whole week without any cold exposure.

ColdTimer has Huberman's protocol built in as a template. set your target (11 minutes per week), log each session, and the app tracks your weekly total. it also has Wim Hof breathing + cold as another template, and you can build custom protocols.