The Benefits of Cold Plunging Are Legit — Here’s Why It’s Worth the Freeze

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image of a swimming hole in an icy lake to represent benefits of cold plunging

It seems like everyone on my social feeds these days is throwing themselves into icy water. Kate Hudson celebrated International Women’s Day with a cold plunge. Harry Styles used an image of him in an ice bath to promote his 2022 tour. Lizzo took TikTokers along for the ride during her adventures in ice plunging. Lady Gaga has been using it as a recovery tool for years. Even non-celebs took advantage of the winter season to hop into icy lakes or crack through the ice on backyard tubs cooled by Mother Nature herself. And every single one of these people seems to enjoy it enough to do it again.

Whether you call it a cold plunge, ice bath, cold water therapy, or cold water immersion, the idea is the same: you submerge yourself in cold water, on purpose, and typically hang out in there for anywhere from a few seconds to a few minutes.

Though it feels like a wellness micro-trend, people have been cold plunging long before TikTok. “Although some may dismiss cold water treatment as a passing fad, it has been used for years for its health benefits,” says Carmen Van Rensburg, an accredited exercise physiologist and consultant to Facialteam. Nordic countries notably cold plunge in combination with time in a sauna, and the practice may date back to the Finnish stone age. More recently, Dutch athlete and speaker Wim Hof, aka “The Iceman” and creator of the Wim Hof Method, has been a proponent of the practice.

@lizzo ♬ original sound – lizzo

What’s different about the current spike in interest is that it’s not just elite athletes cold plunging; it seems that everyone, active or otherwise, is dipping their toes (and the rest of their bodies) in ice water.

If you’re a depths-of-Hades shower lover (hi, it’s me), the idea of a lukewarm rinse — let alone sitting in a tub of ice — sounds like pure torture. But if so many people are cold plunging and loving it, it’s got to be worth it, right? We’re diving into the benefits of cold plunges to see if they live up to the hype. Here’s what science and experts have to say.

What Are the Benefits of Cold Plunging?

As much as you might want to hate on the ice bath trend, there’s some science that backs up its benefits.

For starters, research shows that cold water therapy can help reduce inflammation and perceived soreness after a tough workout, says Michael Hamlin, CSCS, strength and conditioning coach and founder of Everflex Fitness. That’s why it’s been used for so long as a tool to help athletes recover. But that’s not all: cold plunges can also enhance immune function, decrease levels of pain, stress, anxiety, and depression, and increase alertness and energy (thanks to huge spikes in the “fight-or-flight” hormone and neurotransmitter norepinephrine), he says.

Part of the magic in cold plunging is the way it changes your body’s blood flow. “The cold water causes blood vessels to constrict, which increases blood flow to the organs and tissues when the body is warmed up again,” explains Lalitha McSorley, PT, owner and lead physical therapist at Brentwood Physiotherapy in Calgary, Canada. “This can help improve overall circulation and oxygenation of the body.”

That blood flow has a cascading effect, imparting even more perks. “Having proper circulation allows the heart and other organs to perform normally, can help to boost your immune system, and will increase your energy,” explains Matt Tanneberg, DC, chiropractor and certified strength and conditioning specialist in Scottsdale, AZ. It also plays a part in reducing inflammation. Inflammation isn’t always bad — in fact, it’s “vital in the recovery process,” Tanneberg says — but when there’s excess inflammation it can delay healing. “This blood flow, along with the anti-inflammatory benefits, will help speed up your recovery process post-workout or in returning from an injury, as well as decrease your overall muscle soreness,” Tanneberg says.

To add another layer to that, cold plunging also improves sleep quality, “which is important for optimal recovery,” McSorely says, as well as countless other bodily processes. That sleep benefit could be because cold plunging vastly reduces stress. “Exposure to cold water has been shown to activate the parasympathetic nervous system, which helps to reduce stress and promote relaxation,” McSorely explains.

That, and “stress and anxiety are a result of the brain’s perception of a potential threat to the system,” says Kelly Kessler, DPT, host of the Rewiring Health podcast and owner of Optimal You Health and Wellness. Cold exposure can help you train your brain not to respond as impulsively, thus increasing our overall resilience to stress, she explains.

The benefits of cold plunging sound peachy, but is it enough to get people to actually do it? Turns out, yes — and it can actually become quite addicting.

Rachel Pohl, an adventure artist and ambassador for Norwegian activewear brand Kari Traa, who’s currently living in Norway, has recently converted. “If you told me a few years ago that immersing myself in ridiculously cold water would become one of my favorite activities, I would have laughed,” she wrote on Instagram. “But a year and a half ago, I decided to face my discomfort. I read about both the physical and mental health benefits of ice baths, and I was tired of being anxious and constantly sick. So I committed to gradually spending longer and longer in cold water (often in the shower!). Now, I crave the rush of endorphins, and the more often I do this (most days), the less anxiety I experience, the better my immune system is, and I’m also better equipped at handling stressful situations (learning to tolerate discomfort means I can work through hard things).”


Are Cold Plunges and Ice Baths Safe?

Extreme wellness practices can come with extreme consequences, and cold plunging isn’t without its risks.

“Cold exposure intentionally activates the sympathetic (fight, flight, freeze) response of the autonomic nervous system, which can lead to hyperventilation and potentially fainting,” says Kessler. If either of those things happens in open water, you risk drowning. Cold plunging may also cause a heart attack, especially for anyone with a heart condition, Kessler adds. Because cold plunging constricts your blood vessels, it can also cause drastic changes in blood pressure, which can be dangerous, especially if you’re taking blood pressure-reducing medication.

Submerging your body and face into cold water results in the “cold shock response,” according to the American Heart Association (AHA); this is also a risk factor for drowning as it causes a reflexive gasp, and if your head is below the surface, that could make you swallow water. Many people who take part in cold plunging do so by sitting in cold tubs without submerging their heads, but it’s important to be aware of this response if you’re jumping into cold water or diving under.

Cold exposure can cause hypothermia, and that risk is even more pronounced in the water, because it takes heat away from the body 25 times faster than air, per the AHA. However, unless you’re in the water for an extremely long period of time, that shouldn’t be too much of a concern: it takes about thirty minutes for an adult of average size to develop hypothermia — even in near-freezing water, according to the National Center for Cold Water Safety.

In general, “long periods of cold exposure can be dangerous if done improperly, so it’s recommended that anyone using ice baths for recovery should consult a doctor before beginning,” says David Seitz, MD, medical director for Ascendant Detox. “Make sure to get their clear approval before attempting cold water therapy. Additionally, any signs of discomfort or pain during the cold water immersion should be taken seriously, and the person should discontinue using the therapy immediately.”

How to Do a Cold Plunge Safely

Though it’s not without risks, it is possible to do a cold plunge or ice bath safely. Here’s how you can try cold water therapy yourself.

Just remember: before trying a cold plunge, “it’s important to consult a healthcare professional before practicing cold plunging,” Hamlin says.

Start Slowly

One of the easiest ways to dip your toe into the practice is through cold showers. Specifically, try contrast showering, where you switch the temperature of the water from hot to cold and then back to hot again. “This can begin to allow your body to ‘feel’ the benefits of a cold plunge before you even start,” Tanneberg says.

If you’re using a tub or pool to DIY cold plunge, you’ll still want to “start with short periods of immersion and gradually increase the time as your body adapts,” Hamlin says. McSorely recommends starting with short durations of 10-30 seconds. Before hopping in, it can also be a good idea to splash some cold water onto the back of your neck to prime your neurological system for the cold that’s coming, says the AHA.

If you want the stress-relieving perks of cold-water immersion but don’t care for the bodily recovery benefits (or just don’t have a place to try it), you can try submerging just your face. Research shows that doing so offers the same relaxation-inducing activation of the parasympathetic nervous system that you get from dunking your body.

Choose a Safe Location and Temperature

If you’re cold plunging in the wild, opt for designated cold plunging areas, such as cold-water pools or natural bodies of water that are safe for swimming, Hamlin says. That way, you can be sure there are no strong currents, waves, or other factors that could make the environment difficult to swim in (or climb out of) when you’re freezing cold.

As far as temperature goes, it can be difficult to achieve a specific water temp; however, studies on cold water therapy typically show benefits for participants in water between 50 to 59 degrees Fahrenheit (10 to 15 degrees Celsius).

Monitor Your Body

“Pay attention to how your body responds to cold plunging, and stop if you experience any discomfort or adverse effects,” Hamlin says, like feeling dizzy or faint or having trouble breathing. And if you experience any signs of hypothermia, such as shivering or numbness, exit the water immediately, McSorely adds.

Don’t Stay In Too Long, and Warm Up Afterward

“Don’t stay in the water too long; the typical duration in a cold plunge is around three minutes,” Tanneberg adds. (Some studies show increased benefit from ice baths of 11 to 15 minutes, but all the experts here recommend starting slowly and staying in for just a few minutes unless you’re being monitored by a health professional.)

After the plunge, change out of cold, wet clothes or swimsuits and gradually warm up by wrapping yourself in a warm towel or blanket or taking a warm shower, McSorely says. Don’t hop into a super hot shower right away; that will cause your blood vessels to relax or dilate, and you could pass out, according to Cedars-Sinai.

Image Source: Getty Images / Ville Heikkinen

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