Are Cold Plunges Healthy? Benefits, Risks & What to Know

Key Takeaways

• Cold plunges have been linked to a number of health benefits, including improved mood, reduced muscle soreness, and more
• Cold plunges increase your levels of norepinephrine and dopamine, improving both your mood and focus well beyond your cold plunging session.
• During and after each session, the vasoconstricting and vasodilating of your blood vessels flushes metabolic waste out of your muscles and replaces it with nutrient-rich blood, reducing muscle soreness.
• Regularly cold plunging can help train your nervous system to stay calm under physiological stress and may even boost your immunity by increasing circulation of your white blood cells.
• If you have cardiovascular conditions, arrhythmias, Raynaud's disease, or uncontrolled hypertension, unmanaged asthma, or unhealed wounds, get a physician’s clearance before starting a cold plunge routine.

You might think of cold plunging as just something elite athletes do as part of their recovery. But most healthy adults who make cold plunging a wellness habit can safely enjoy its benefits, such as reduced muscle soreness, an improved mood, and better focus. That said, knowing the difference between who will benefit and who should skip the cold plunge is worth understanding before you step in for the first time.

This guide covers cold plunging’s research-backed health benefits, the real risks, who should avoid it entirely, and how to start safely at home.

What Is a Cold Plunge?

A cold plunge involves sitting in cold water, ideally for the research-backed range of 50° to 59°F for 2 to 10 minutes. 

Cold plunging triggers an immediate response in your body: vasoconstriction as your blood vessels narrow, a spike in your heart rate, and the activation of your parasympathetic nervous system as you get out and begin to warm back up again. This cycle of cold exposure and rewarming is what produces the neurochemical and physical recovery benefits that peer-reviewed research studies have documented.

The Health Benefits of Cold Plunges

For water temperatures of 50° to 59°F, the health benefits of cold plunging are well-documented, although scientists agree more research is necessary to better understand all potential outcomes. Here’s what we know so far.

Improves Your Mood and Mental Resilience

When you get into a cold plunge, your norepinephrine (also called the “fight or flight” chemical) and dopamine (the “feel good” chemical) levels rise above baseline and remain elevated even after you get out of the water. With regularity, this physiological response could lessen the symptoms of mood-affecting conditions, like anxiety and depression.

Also, it takes motivation and discipline to get into a tub of cold water. Intentionally facing this type of discomfort on a regular basis helps you build up psychological resilience that you may be able to carry into other areas of your life, such as your workouts, your profession, and day-to-day challenges.

Boosts Your Metabolism and Burns Fat

Your body contains two types of fat: white fat, which stores energy, and brown adipose tissue (BAT). 

BAT burns fat through thermogenesis, a process in which your cells oxidize fatty acids to generate heat. When you step into cold water, your sympathetic nervous system releases norepinephrine, signaling your BAT to activate and generate heat. Then you begin to shiver, another trigger for thermogenesis, which further increases your resting metabolic rate. In this way, cold plunging can help with weight loss, although exercise and a calorie deficit will still be the primary drivers of your results.

Repeating this cycle as part of a consistent cold plunge routine could make your body’s BAT activation progressively more effective over time. 

Lessens Recovery Time After Workouts

Cold plunging can accelerate muscle recovery through your circulatory system’s natural functions. When you get into cold water, your blood vessels constrict, flushing metabolic waste out of your muscles. After you get out and begin to rewarm, your blood vessels dilate, letting in fresh, nutrient-rich blood cells. 

This natural effect of circulation can reduce inflammation and delayed onset muscle soreness (DOMS). It may even facilitate you getting back to peak athletic performance faster than you would have otherwise. This is why so many elite athletes build a cold plunging routine into their recoveries.

Improves Your Stress Resilience

Each session trains your nervous system to stay calm under acute physiological stress, and that adaptation could carry over into your daily life over time. Cold plunges may also help to improve your immunity by increasing white blood cell circulation, though long-term immunity benefits require further research.

Cold Plunging Risks and Special Considerations

Certain people need medical clearance before starting a cold plunging routine. If you’re thinking about following a cold plunge protocol, be sure to get an okay from your doctor first. Here are some things to keep in mind.

Cardiovascular Risks

The American Heart Association warns that sudden cold water immersion triggers immediate vasoconstriction and a sharp spike in blood pressure and heart rate. If you have pre-existing heart conditions, arrhythmias, or uncontrolled hypertension, that cardiovascular jolt is a genuine medical risk.

The Cold Shock Response

The first few seconds in cold water will cause you to involuntarily gasp followed by hyperventilation. This is a well-documented physiological reflex that can catch unprepared beginners off guard. To avoid an emergency, practice controlling your breathing before you get into the cold plunge tub and as you are entering the water.

Who Should Not Cold Plunge

Cold plunging is not recommended if you have cardiovascular disease, uncontrolled hypertension, Raynaud's disease, unmanaged asthma, or open wounds, or if you are pregnant. Ask your doctor before starting a cold plunge routine if any of these apply to you, and get out of the water immediately if you experience any chest pain, dizziness, sudden shortness of breath, or numbness beyond a normal cold sensation.

Timing Considerations for Athletes

Research indicates that cold plunging immediately after resistance training may blunt the synthesis of muscle proteins by reducing the inflammatory signal that drives hypertrophy, or the muscle growth that results after exercise. If building muscle is your primary goal, waiting at least 4 to 6 hours after your heavy strength training sessions before cold plunging could be a smart approach. With cardiovascular workouts, you can cold plunge within minutes of finishing.

Safe Temperatures and Durations

Peer-reviewed research consistently identifies 50° to 59°F as the effective temperature range for cold plunging benefits. This range triggers meaningful norepinephrine release and supports your muscle recovery without pushing your body into dangerous hypothermia territory.

Experience Level	Target Temperature	Duration
Beginner (weeks 1 to 4)	59° to 60°F	1 to 2 minutes
Intermediate (months 1 to 3)	57° to 59°F	2 to 5 minutes
Advanced (3+ months)	50° to 55°F	5 to 10 minutes

 

Start at 60°F for 1 minute. Over the next weeks and months, alternate between adding time and going down in temperature. Do one or the other, never both at the same time, and do this gradually as your cold tolerance builds. Within 5 to 10 sessions you will likely notice your cold shock response becoming noticeably milder as your body adapts. 

A cold plunge routine for beginners should start with 3 sessions per week and 48 hours between each plunge to support your body’s adaptation to the cold temperature. Then gradually build to 4 sessions per week. Eventually, you can aim for up to 5 sessions per week.

How to Start Cold Plunging at Home

The barrier to entry for cold plunging is low. All you need to get started is a tub, a thermometer, some ice or a chiller, and the motivation to start a new daily habit. Here are the 5 steps we recommend you take when just starting out.

Step 1: Choose Your Setup

A bathtub and ice works for testing your tolerance, although you’ll have to rely on trial and error when it comes to how much ice to add to reach your target temperature. You’ll also have to keep a close eye on the thermometer and be prepared to add more ice once you get in, as your body heat will affect the temperature of the water. 

When you’re ready to make cold plunging a lasting routine, or if you want the convenience of automatic temperature control, it’s worth looking into a dedicated portable cold plunge tub with a water chiller and filtration. This type of cold plunge setup will give you consistent temperature control (no more paying for ice) and help keep your water clean.

Step 2: Plan Your Temperature & Duration

Target 59° to 60°F for your very first session and aim to spend 1 minute in the water. For your first week, 3 sessions is appropriate, with at least 48 hours between each plunge. 

Step 3: Master Your Breathing

Your first plunge will trigger an involuntary cold shock response: gasping, rapid breathing, and a rising heart rate. To try to counter this as much as possible, run through 4 to 6 cycles of box breathing in the 2 minutes before you get in: 

1. Exhale completely.
2. Inhale through your nose for 4 seconds.
3. Hold your breath for 4 seconds. 
4. Exhale through your mouth for 4 seconds.
5. Hold at empty for 4 seconds.
6. Repeat steps 2 through 5 for your desired number of cycles.

As you enter the cold plunge, breathe steadily through your nose. Continue doing this for the entirety of the cold plunge. 

If you make this breathing routine a habit from day one, it can make your whole cold plunging experience more manageable and even enjoyable.

Step 4: Build a Consistent Weekly Schedule

You may gradually work up to 3 to 5 sessions per week, for 10 minutes each at 50°F, but allow yourself several weeks or even months to progress to that point. There’s no need to go colder or for longer. As long as you are within the range of 50° to 59°F for 2 to 10 minutes each session, you will see the benefits that come with a consistent cold plunge routine.

Step 5: Monitor and Adjust

Track your energy and mood after each session. If your muscle soreness or fatigue increases rather than improves, try reducing the frequency of your sessions before extending your duration.

Frequently Asked Questions

Are cold plunges good for you every day?

Daily cold plunging isn’t recommended because it could blunt your norepinephrine response over time. Three to 4 sessions per week, with 48 hours between sessions, will support your body’s as it adapts.

What are the benefits of a 2-minute cold plunge?

Two minutes at 50° to 59°F can improve your mood and mental resilience, boost your resting metabolism, reduce muscle soreness, and lessen the time your body needs to recover between workouts.

Are cold plunges good for women specifically?

Yes, cortisol reduction, mood, and stress resilience benefits appear consistently across sexes. The reduced cortisol levels over time may help regulate women’s menstrual cycles.

Can cold plunges cause a heart attack?

For anyone with cardiovascular disease, arrhythmia, or uncontrolled hypertension, the blood pressure and heart rate spike from cold plunging can be dangerous, necessitating a doctor’s approval first.

What are the drawbacks of cold plunges?

The main health drawbacks are cardiovascular stress and the potential blunting of muscle growth. For some, the daily maintenance of an outdoor or indoor cold plunge can also be a drawback.

How long does it take to see benefits from cold plunging?

Most people notice mood and energy improvements within 1 to 2 weeks. Deeper adaptations, including reduced muscle soreness and improved stress resilience, typically build over 3 to 5 weeks.

When is the best time to cold plunge?

Morning is the best for energy and mental clarity since evening plunges can elevate your cortisol when you want it to decline, and this could disrupt your sleep.

Is cold plunging safe for beginners?

Yes, cold plunging can be safe for healthy adults who follow a progressive protocol. Start at 59° to 60°F for 1 minute, 3 three times per week, and build gradually to 4 or 5 times per week.

This information on this website is informational only and does not constitute medical advice. Consult your healthcare provider before beginning cold water immersion.