Experts Unpack the Benefits of Cold Plunges (and Whether They're Worth It)

These days, it seems like everyone is braving the cold and submerging themselves in icy water. Celebrities like Courteney Cox, Kate Hudson, Hailey Bieber, Lizzo, and Lady Gaga have all posted themselves indulging in an occasional ice bath, all while touting the alleged health benefits. But are the benefits of a cold plunge legit? And more importantly — are the advantages actually worth the freezing temperatures?

Call it a cold plunge, an ice bath, cold-water therapy, or cold-water immersion — the basic concept is all the same. The idea is to completely submerge yourself in cold water (usually below 60 degrees Fahrenheit), for anywhere from 30 seconds to a full 15 minutes. Interestingly enough, regardless of celebrity status, most people seem to enjoy cold plunging enough to do it again — and that's probably thanks to the many reported benefits of cold plunging. Think reduced inflammation, less muscle soreness, better sleep, and potentially sharper focus, per the Cleveland Clinic.

"Although some may dismiss cold-water treatment as a passing fad, it has been used for years for its health benefits," says exercise physiologist Carmen Van Rensburg. Nordic countries notably combine cold plunges with sauna sessions (a practice known as "contrast therapy"), which may date back to the Finnish stone age.

Now that cold plunging is trending again, it's not just elite athletes and actors getting in on the ice. If your shower temperatures usually reach the depths-of-Hades (hi, it's me), the idea of a lukewarm rinse — let alone a tub of ice — might sound like pure torture. But if so many people are cold plunging and swearing by it, there's got to be something great about it . . . right? To fully unpack the hype, we asked experts to help explain the actual health benefits of cold plunges. Read on to see what they had to say.

Carmen Van Rensburg, is an accredited exercise physiologist with a degree in Biokinetics.

Michael Hamlin, CSCS, is a personal trainer, strength coach, and the founder of Everflex Fitness.

Lalitha McSorley, PT, is a physiotherapist, founder, and owner of Brentwood Physiotherapy.

Matt Tanneberg, CSCS, is a certified strength and conditioning specialist.

Kelly Kessler, PT, DPT, CSCS, is a licensed physical therapist and the host of the "Rewiring Health" podcast.

David Seitz, MD, is the acting medical director of Ascendant NY and associate professor at the Weill-Cornell School of Medicine.

Soaking in ice-cold water isn't the most appealing pitch, but the science confirms there are real benefits to cold plunging. Here are a few worth noting:

Rachel Pohl, an adventure artist currently living in Norway, is one of many cold plunge converts. "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)."

Dutch athlete and speaker Wim Hof, aka "The Iceman" and creator of the Wim Hof Method, is another creator who uses his platform to share some of the physical and mental health benefits of traditional ice baths. "I always say, a cold shower a day keeps the doctor away," he wrote on Instagram. "If you've ever taken one, then you know from experience that it shakes off the cobwebs and leaves you eager to attack the day."

Not long. "The typical duration in a cold plunge is around three minutes," Tanneberg says. Some studies show increased benefits in ice baths lasting 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. In the beginning, they suggest working your way up a few seconds at a time. McSorely specifically recommends short durations of 10-30 seconds.

Extreme wellness practices may have 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," Kessler says. 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 in 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 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 30 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. "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."

Though it's not without risks, it is possible to do a cold plunge or ice bath safely. Just remember: "it's important to consult a healthcare professional before practicing cold plunging," Hamlin says. Here are some additional tips to help.

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. 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, the AHA says.

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.

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).

"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.

After the plunge, change out of your cold, wet clothes or swimsuit and gradually warm up by wrapping yourself in a warm towel or blanket or taking a warm shower, McSorely says. Resist the urge to hop into a super-hot shower right away, as this will cause your blood vessels to dilate, and you could pass out, according to Cedars-Sinai.

Lauren Mazzo was the senior fitness editor at PS. She is a certified personal trainer and fitness nutrition specialist through the American Council on Exercise. Prior to joining PS, she worked for six years as a writer and editor for Shape Magazine covering health, fitness, nutrition, mental health, sex and relationships, beauty, and astrology.

Chandler Plante (she/her) is an assistant health and fitness editor for PS. She has over four years of professional journalism experience, previously working as an editorial assistant for People magazine and contributing to Ladygunn, Millie, and Bustle Digital Group.