Cold plunge and sauna videos on YouTube: what to trust

Video mentioned on this page:

Using Deliberate Cold Exposure for Health and Performance | Huberman LabAndrew Huberman
Uploaded Apr 4, 2022 · 2M views (as of Oct 31, 2026)

Quick answer

Cold plunge and sauna videos are everywhere on YouTube, and they rarely agree. One says three minutes at a set temperature, another says eleven minutes a week, a third says always end on cold. People starting out keep asking which one to follow.

This page is about sorting the videos and starting sensibly. It won't tell you what cold or heat does for your health, and if you have a heart condition, high blood pressure or are pregnant, talk to your doctor before trying either.

What 125x is: 125x is a web app at 125x.app. You connect your YouTube subscriptions, and it gives you a feed of the latest videos from the channels you follow, each with a summary: a verdict, the 5 key takeaways, and the spoiler, plus Actionable and Lessons tabs with more tips. You read that and decide what's actually worth opening.

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What the careful sources agree on

The protocols really are all over the place. In a Mayo Clinic Press interview, a sports medicine doctor says the best routine is the one that's easiest and least stressful for you, and you can start as simply as hosing your legs after a run.
More is not better. Researchers in an NPR report say staying calm through the first painful moments matters more than how long you stay in, and their advice for first-timers is to keep it short, infrequent and only mildly cold.
Start short in the sauna too. Per the RNLI's sauna and cold water guidance, first-timers should keep sauna sessions to 5 to 10 minutes and build up slowly.
Skip alcohol before either one, never plunge alone, and get out if you feel dizzy or start shivering hard.
Some people should check with a doctor first. the American Medical Association's patient guide names heart rhythm problems, uncontrolled high blood pressure and vascular disease.

How to sort the videos

Look for safety notes. A good video tells you who shouldn't do it and when to get out. If it skips that part, take the rest with a grain of salt.
Check what the creator is selling. A lot of cold plunge content comes from people selling tubs, chillers or memberships.
Treat a specific number as that person's routine. A temperature and time that works for a creator years into it is rarely the right starting point for you.
Long podcast episodes, like the Huberman Lab one above, are over two hours. Read a summary first and jump to the part about how to start.

Agree or disagree: you need a real plunge tub

Some people say there's no point unless you buy a proper cold tub. We disagree.

The doctor in the Mayo Clinic Press interview says you don't need special equipment to start, and a cold shower at the end of a normal one is how many regulars began. Try that for a few weeks before spending on gear.

Our own tips

Our unusual tip: if a creator you follow has posted their very first plunge, watch that one before their latest. It's a far more realistic picture of a first session than a polished routine filmed years later.
Write down what you actually did after each session: water temperature if you know it, minutes, and how you felt. It's easier to build up slowly when you can see last week's numbers.
Bring a friend the first few times, and plan how you'll get out and get warm before you get in.
Turn off autoplay before you watch, since one cold plunge video tends to lead straight into a dozen more.

Where 125x fits

On 125x, every video in your subscriptions feed comes with a summary: a verdict, 5 takeaways and the spoiler, plus an Actionable tab with steps and a Lessons tab with the bigger ideas. If you follow health channels that post long episodes on cold and heat, 125x shows the verdict and takeaways for each new one, so you can tell which ones are worth the full listen. More in our guide to long health podcasts.

FAQ: questions people ask

How long should a beginner stay in a cold plunge?

There's no single safe number. Careful sources suggest starting with a few minutes or less, keeping it short, getting out if you shiver hard or feel dizzy, and never going alone.

How long should you stay in a sauna the first time?

Sauna safety guidance suggests 5 to 10 minutes for first-timers, building up slowly and leaving right away if you feel dizzy or sick.

Should you do sauna or cold plunge first?

Videos disagree, and researchers say there's no good evidence on which order is better. Pick the order that feels manageable and keep both sessions short.

Who should avoid cold plunges?

People with heart rhythm problems, heart or vascular disease, uncontrolled high blood pressure, or who are pregnant should talk to a doctor first.

Do I need a cold plunge tub?

No. Many people start with a cold shower at the end of a normal one before buying any equipment.