How to Take an Ice Bath: A Step-by-Step Guide for Your First Plunge

Your first ice bath is mostly a breathing exercise. The cold itself is not the hard part; the first 60 seconds are. Your body answers sudden cold with a gasp and a burst of fast breathing you didn’t ask for, and how you handle that minute decides whether the rest feels calm or frantic. Two opinions up front, both earned: you don’t need ice-water temperatures, and you don’t need long sessions. A few calm minutes in 50s water beats a frantic one in the 30s.

One safety line before you start, and it is specific: if you have heart disease, high blood pressure, an arrhythmia or long QT syndrome, Raynaud’s, cold urticaria, epilepsy or diabetic nerve damage, or you are pregnant, talk to your doctor first. Everyone else: never plunge alone, keep your head above water, and skip it after drinking. The real dangers of cold plunging covers each risk with its evidence.

Step 1: Set up before you get cold

Any container that lets you sit with the water at your shoulders works. Most people start in one of these:

Have these within reach before you get in, because you won’t want to go looking for them after:

• A thermometer. A floating one in the water, not a guess from how the ice looks. Bag counts are estimates; the thermometer is the truth.
• A timer outside the tub. A phone or watch on the edge. Time stretches in cold water, and you will undercount.
• A towel, warm layers and dry socks laid out in the order you will put them on.
• A mat or towel on the floor where you step out, and something solid to hold.
• Someone nearby. In the house is fine for a bathtub. For deep or open water, someone at the edge.

Whatever tub you choose, put it where you already are. A plunge a few steps from the sauna, the shower or the squat rack gets used; one at the far end of the yard is easy to skip on a cold morning.

Step 2: Pick a temperature that is cold enough, not as cold as possible

You don’t need ice-water temperatures to get the full cold shock. The National Weather Service notes that the gasp response can be just as severe in 50 to 60°F water as at 35°F. In lab work, the maximum cold-shock responses started at about 50°F in people wearing nothing, and were smaller at 59°F. Going colder mostly makes the shock last longer rather than hit harder.

That makes 55 to 60°F a sensible first plunge: cold enough to be real, and a step below the maximum response. After a few sessions, 50 to 55°F is a good home setting.

We know what works from running SaunaShare and from working with commercial bathhouse operators since 2018. The people who run plunges for thousands of guests don’t chase the coldest number either. Of the 428 public saunas and bathhouses listed on SaunaShare, 326 (76%) have a cold plunge. Thirty-nine publish the water temperature. Their coldest tub has a median of 45°F and their warmest a median of 50°F. Only 5 of the 39 run any tub below 40°F. Bathhouse Williamsburg in Brooklyn runs 45°F and 50°F pools side by side, and White Mountain Sauna Haus in New Hampshire holds individual tubs at 40 to 50°F, filtered and ozonated, with the water changed daily (SaunaShare listings, November 2026). Colder isn’t better. 45 to 50°F is where the pros run, and you don’t need to start there. How cold your plunge should be has the full temperature-by-temperature breakdown.

Getting there with ice is simple arithmetic: about half a pound of ice per gallon of water for every 10°F you want to drop. A 40-gallon bathtub from 60 to 50°F needs about 21 lb; a 100-gallon tub needs about 52 lb. Tap water is warmer in summer, so measure it before you buy ice, add most of the ice, stir, wait a few minutes and measure again. Our ice calculator runs the numbers for your tub.

Step 3: Get in slowly and breathe through the cold shock

The first minute is the riskiest part of any plunge. The Canadian Safe Boating Council puts it simply: cold shock passes in about 1 minute, though the National Weather Service says it can run 2 to 3 minutes or more. During it, your breathing can jump far past normal. Two habits make it manageable, and both have been tested:

1. Enter in stages. Stand or sit waist-deep for about 30 seconds before you go to your shoulders. In a controlled study, that staged entry cut the over-breathing by about a third (35 to 38%) compared with going straight in.
2. Take over your breathing. Over-breathing in ice water slowed blood flow to the brain by 43%, which is why first-timers can feel lightheaded. When nine first-timers were taught to breathe slowly, they kept it close to normal. Breathe out long and slow through pursed lips, then let the next breath come. Count them if it helps.

Two more rules for the water:

• Keep your head out, and no breath-holding. Breath-hold dunks in 41 to 50°F water caused irregular heartbeats in 11 of 12 healthy volunteers. Shoulders under is the goal; do any breath work before you get in.
• Keep your hands out, resting on the rim or on your knees above the water. Hands held in 41°F water lost 13 to 16% of their grip strength within minutes, and you need that grip to climb out. Neoprene gloves or socks help if hands and feet are your limit.

Step 4: Stay 1 to 2 minutes the first time, then work toward 3 to 5

Former Navy SEAL and physician Dr. Kirk Parsley gave Brian Cain a short answer on the Mental Performance Mastery Podcast when Brian asked whether two minutes or five was right:

“It’s like three to five minutes for most people if you’re doing it pre-workout. If you’re just doing it to wake up, you only need a minute in those things.”

Dr. Kirk Parsley, on Brian Cain’s podcast

That range lines up with the research on how a plunge makes you feel. In a 2026 randomized trial of 140 adults with low mood, 5 minutes in about 57°F seawater lifted mood as much as 20 minutes did. The Copenhagen winter swimmers in a well-known 2021 study averaged about 1.4 minutes per dip and 11 minutes a week in cold water. Nobody has shown that longer plunges add benefit.

So for a beginner: 1 to 2 minutes for the first session or two, then add time until you reach 3 to 5. Then stop adding. Dr. Parsley is firm on that point: “Even if you do feel like you can, just don’t increase them.” Our cold plunge duration guide goes deeper on time and temperature.

Get out early if you are shaking hard, can’t make your hands work, feel confused or dizzy, or your breathing won’t settle after the first couple of minutes.

Step 5: Get out like your legs belong to someone else

Cold muscle is weaker and slower, and your feet may be numb. Move to a seated position first, put both hands on something solid, and stand in one controlled motion. Step onto the mat, not a wet floor. Very cold, longer plunges can throw off your balance for a while: after 10 minutes in roughly 34°F water, 29 service members swayed far more than normal, and were still unsteady after 40 minutes of rewarming. A short beginner plunge at 55°F is nowhere near that, but the lesson holds: no stairs two at a time straight after.

Step 6: Rewarm on your own terms

Your core keeps cooling after you get out, because cold blood from your arms and legs flows back to the middle. This is the afterdrop. In pooled data from 157 people, the biggest gap in core temperature came about 60 minutes after the bath, not at the moment they got out. The cooling isn’t over when you step out, so get warm before you feel you need to.

• Dry off fast and dress in layers, starting with your core. The CDC’s advice for someone who is too cold is to warm the center of the body first and give warm drinks, never alcohol.
• Move gently. Walk around, do some easy squats or arm circles. Go easy on hard exercise as your only way of rewarming: in mildly hypothermic men, it made the afterdrop 58% bigger than shivering did.
• Let shivering happen. It is your body making heat. A warm drink and a blanket help it along.

Building a routine: your first four weeks

The good news for beginners is that the worst part shrinks fast. A meta-analysis of cold-shock habituation found the gasp response eases after about four immersions, with heart rate about 14 beats per minute lower and breathing about 8 breaths per minute slower on entry. In one lab study, six 3-minute dips at 59°F cut breathing in the first 30 seconds of a 50°F immersion from 47 to 24 breaths a minute, and the effect was still there seven months later.

Two or three plunges a week is a sensible pace. It matches the 2.6 swims a week of those Copenhagen winter swimmers, and it is what Dr. Parsley did himself when he had a plunge at home: “I did cold plunge two to three days a week and I did sauna four to five days a week,” matched, he says, to the type of workouts he does.

▶ Play the 0:41 clip

Change one thing at a time: colder or longer, not both in the same week. Keep a one-line log of water temperature, minutes and how you felt an hour later. That log is how you will know the plunge is doing something for you, and when a colder or shorter session suits you better.

When to plunge if you train

This is the one timing rule with real evidence behind it. Dr. Parsley told Brian Cain it is the one thing about cold plunging he would call settled:

“The one piece of information that we do know that is pretty well settled is that if you use a cold plunge immediately after your workout for recovery, it will reduce your ability to make strength and muscle gains from your workout.”

Dr. Kirk Parsley, on Brian Cain’s podcast

▶ Play the 1:08 clip

The trials agree. In a 12-week study, men who finished each lifting session with 10 minutes of cold water gained less strength and muscle than men who did an easy bike ride instead. A 2024 meta-analysis of 8 studies found the cold-water groups added less muscle. Aerobic training is different: a 2021 meta-analysis found regular cold plunges didn’t affect gains in aerobic power or time-trial performance.

His fix is to move the plunge in front of the session, then warm up properly. After about five minutes in very cold water, he says, your limbs and probably your core stay a bit cooler for an hour or two: “So you still have time to warm up, stretch out, do your normal stuff.” If you would rather not train cold at all, plunge first thing in the morning and train later. The full breakdown, with every clip and study, is in cold plunge before or after a workout.

FAQ

How do you take an ice bath for the first time?

Get the water to about 55 to 60°F, sit waist-deep for 30 seconds, then lower to your shoulders and breathe out long and slow until the gasping settles. Stay 1 to 2 minutes with your head and hands out of the water, get out carefully, then dry off, dress in layers and move around. Have someone nearby.

What is a good ice bath routine for beginners?

Two or three plunges a week. Start at 55 to 60°F for 1 to 2 minutes, then over about four weeks move to 50 to 55°F for 3 to 5 minutes and stay there. The gasp response gets noticeably smaller after about four sessions.

How do I prepare for my first cold plunge?

Check the water with a thermometer, lay out a towel and warm clothes, put a timer outside the tub and a mat where you step out, and make sure someone is nearby. Do any breathing practice before you get in, never under water. Skip it if you have been drinking.

How long should a beginner stay in an ice bath?

One to two minutes for the first session or two, building to 3 to 5 minutes. A 2026 trial found 5 minutes lifted mood as much as 20, and there is no evidence that longer plunges add benefit.

Should I take an ice bath before or after a workout?

Before, or on a different day, if you lift for strength or muscle; plunging right after lifting reduces the gains. After aerobic training, the timing doesn’t seem to matter.

Can I take an ice bath in my bathtub?

Yes. Recline so your shoulders are under, and plan on about 21 lb of ice to take a 40-gallon fill from 60 to 50°F. Our bathtub guide has the ice table and the tub-specific safety steps.

Sources

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