By Rob Stickler — Plunge Performance & Recovery, Dana Point, CA
If you spend any real time around a cold plunge studio, one question comes up more than any other: how often should I be doing this?
It’s the right question to ask. And the honest answer has two parts. There’s the research-backed minimum, which is surprisingly small. And there’s your personal optimal, which is what you’re really after — and which only shows up if you pay attention.
Let’s break it down.
Where the 11 Minutes Comes From
You’ve probably heard the number floating around: 11 minutes of cold per week. It’s become the rule-of-thumb answer on every wellness podcast and Reddit thread for the last few years. And unlike a lot of internet wisdom, this one actually traces back to peer-reviewed research.
The source is Dr. Susanna Søberg’s 2021 paper in Cell Reports Medicine. She studied experienced Scandinavian winter swimmers — people who’d been doing brief cold-water dips combined with sauna sessions, 2–3 times per week, for years. What she found was meaningful: those swimmers showed greater brown adipose tissue activity, better cold-induced thermogenesis, and improved insulin sensitivity compared to non-swimmer controls.
When Dr. Andrew Huberman brought Søberg onto the Huberman Lab podcast and translated her findings into a usable protocol, the now-famous number emerged: roughly 11 minutes of total cold exposure per week, split across 2–4 sessions of 1–5 minutes each, at water temperatures between 45–55°F (7–13°C).
That’s the minimum effective dose — the smallest amount of cold that consistently moves the needle on metabolism, mood, and resilience. It’s not the optimal dose. It’s the floor.
Why Our Studio Plunge Changes the Math
Here’s something worth knowing: our plunge water at Plunge Performance & Recovery sits between 33–48°F — colder than the 45–55°F range Huberman cites as a baseline.
Why does that matter? Because dose isn’t just minutes — it’s minutes × temperature. The same 11 weekly minutes at 39°F is meaningfully more potent than 11 minutes at 50°F. Translation: at our studio, you can hit the Søberg minimum with shorter sessions and still get the full physiological signal. That’s part of why we keep the water where we do.
A Practical Starting Point
If you’re new to this — or you’re returning after a long break — don’t try to engineer the perfect protocol on day one. Start here:
- Duration: 3–7 minutes per session
- Temperature: the warmer end of our range, around 48°F
- Frequency: 3 times per week
- Pattern: non-consecutive days work well — Monday / Wednesday / Friday is a clean starter
That gets you right around the 11-minute weekly minimum, with enough recovery between sessions to feel each one. Stay on this for two to three weeks before changing anything.
Track Your Way to Your Optimal Dose
This is the part most people skip — and it’s the part that actually matters.
Individual variation in cold response is massive. Your friend’s optimal protocol is not your optimal protocol. The only way to find yours is to track, and the tracking doesn’t have to be complicated. A notebook works. Apple Health or Whoop works. Pick something you’ll actually do.
What to log:
- Morning mood, 1–10. Cold tends to lift baseline dopamine; you’ll see this shift first.
- Sleep quality (or your wearable’s sleep score, if you’ve got one)
- Perceived recovery — soreness, joint stiffness, readiness to train
- Resting heart rate — wearables make this trivial
- Energy at 3pm — the post-lunch crash is a sensitive signal
- Anything else you actually care about — skin, libido, focus, anxiety
After 3–4 weeks of data, patterns show up. You’ll see whether 11 minutes is enough, whether your sweet spot is closer to 15 or 20, whether morning sessions hit differently than evening ones. That’s your optimal dose — earned, not borrowed.
Is There Such a Thing as Too Much?
No published research has identified a hard ceiling on weekly cold exposure. But practically, for most people, anything beyond ~10 minutes per day on average starts to flatten the curve. Watch for:
- Persistent fatigue that doesn’t lift
- Cold hands and feet hours after your session
- Suppressed appetite over multiple days
- Mood drag instead of mood lift
Any of those, and you’re past your optimal. Pull back, give it a week, reassess.
The “can I plunge every day?” question gets asked constantly. The answer is yes, you can — but you should be the kind of person who notices what your body is telling you, and adjusts. Daily works great for some people. For others, four or five days a week with two off is the move.
When NOT to Plunge
A few real ones, not to be cute:
- You’re actively sick — your immune system is already working; don’t add a stressor.
- You just finished a hypertrophy-focused lifting session. Cold within 4–6 hours of resistance training blunts the muscle-growth signaling your workout just triggered. If your goal is size, plunge on rest days or earlier in the day.
- Uncontrolled cardiac or blood pressure conditions. Talk to your doctor before adding cold exposure. The plunge is a real physiological stressor.
- Pregnancy. Same — talk to your doctor.
For endurance training, general fitness, mood, recovery, sleep, focus — cold is on the menu. Use your head.
Morning or Evening?
Both work. They do different things.
Morning gives you the cleanest dopamine and norepinephrine lift — sharper focus and elevated mood that lasts for hours. This is Huberman’s stated preference, and most of our members who plunge before work agree.
Evening can sharpen alertness right when you don’t want it. For some, that disrupts sleep. For others, it has no effect or actually improves it (something about the post-plunge thermal rebound). Log it. Find out which camp you’re in.
Find Your Plan
Here’s where the studio comes in: once you’ve put in three or four weeks of tracking and you know your real weekly minutes — talk to our front desk team. We’ve got single sessions, 4-packs, 10-packs, and unlimited memberships, and the most economical option depends entirely on your actual cadence. People who try to guess up front usually pay more than they need to.
The point of this whole exercise is that 11 minutes a week is the floor, not the ceiling, and your optimal is something you’ll know after a month of paying attention. Start there. Track. Adjust. We’re here to help you tune it.
Come Plunge
The water’s ready. The science is on your side.
Sources & Further Reading
- Søberg et al., Cell Reports Medicine, 2021 — Altered brown fat thermoregulation and enhanced cold-induced thermogenesis in young, healthy, winter-swimming men
- Huberman Lab — Dr. Susanna Søberg: How to Use Cold & Heat Exposure to Improve Your Health
- Huberman Lab — Cold Plunges and Deliberate Cooling (topic page)
- Plunge Performance — Sauna + Cold Plunge: What the Science Actually Says About Combining Heat and Cold