If you’ve spent any time around a competition barn in the last decade, you’ve probably seen some form of cryotherapy in action. Maybe it was a groom wrapping a horse’s legs in what looked like a high tech boot, or a horse standing inside a giant foggy machine that seemed more suited to a sci-fi movie than a barn.

That’s cryotherapy, and it has become an important part of equine sports medicine. It’s used for everything from managing acute injuries to helping horses recover after hard work, whether you’re at a veterinary clinic, a competition barn, or simply caring for your horse at home.

Cold therapy has been part of horse care for generations—cold hosing a sore leg or strained tendon is nothing new. What’s changed is how much we now understand about what cold actually does inside the body, along with the technology available to deliver it more effectively and consistently.

This article takes a closer look at how cryotherapy works inside a horse’s body, the different cold therapy methods available today, what the research tells us, and how to use these treatments safely and effectively.

At its most basic, cryotherapy means using cold as a treatment to help manage inflammation, pain, and tissue damage.

For horses, that can look very different depending on the situation. It might be a few minutes of cold hosing after a workout, several days of continuous hoof cooling during a laminitis emergency, or a short session in a whole body cryotherapy chamber before a competition.

Horses are especially well suited to cold therapy because their unique anatomy and physiology allow them to tolerate very cold temperatures on their lower limbs remarkably well. Some of the temperatures used in equine cryotherapy would be uncomfortable to human tissue with prolonged exposure, but horses can tolerate much colder conditions on their lower legs for extended periods when the treatment is properly controlled.

Cold therapy works in several different ways at once, and understanding what’s happening inside the body helps explain why the timing and length of treatment matter so much.

• Vasoconstriction is one of the main effects. When tissue gets cold, the blood vessels narrow, which reduces blood flow to the area. That can limit the amount of fluid moving into the surrounding tissue and help control swelling.

• It also slows cellular metabolism. Cooling the tissue causes cells to work more slowly, which means they need less oxygen and produce fewer metabolic byproducts. This can help limit secondary tissue damage caused by an excessive inflammatory response after an injury.

• Cold can also reduce pain. Lower temperatures slow the speed at which nerves transmit signals, essentially turning down the intensity of pain messages traveling to the brain. That’s one reason cold therapy can provide noticeable relief when a horse has an acutely painful injury.

• Finally, cold can slow certain enzymes involved in inflammation and tissue breakdown. This is particularly important in conditions such as laminitis, where controlling enzymatic activity may help limit damage to the sensitive structures within the hoof.

Together, these effects explain why cold therapy has become such a widely used tool in equine medicine. But the key is using the right temperature, treatment method, and duration for the specific situation rather than assuming that colder or longer is always better.

Not all cold therapy works the same way, and the method you choose matters just as much as deciding to use cold therapy in the first place. Different treatments are better suited to different situations, so it helps to know what each option actually does.

1. Cold Hosing

Cold hosing is the old standby, and it’s still one of the simplest and most effective ways to manage swelling and minor strains in the lower leg. Running cold water over a limb for about 15 to 20 minutes provides consistent cooling and is generally very safe when done properly.

The biggest drawback is convenience—someone has to hold the hose, the horse needs to stand quietly, and it’s not exactly practical when you need to treat multiple areas or continue treatment for an extended period.

2. Ice Boots and Wraps

Ice boots and wraps have become a staple in many barns because they make cold therapy easier to manage. Instead of standing there with a hose, you can fit the boot, secure it, and let it do the work.

Boots that use a mix of ice and water cool the leg more evenly and effectively than boots that press solid ice or frozen gel packs directly against the skin. As the ice melts, the cold water moves around the limb, helping the entire area cool more consistently.

Some research has also found that certain boots can cool the hoof wall to therapeutic temperatures while allowing the horse to move around, which can make longer treatment sessions easier to manage.

3. Ice Water Immersion and Soaking Boots

When laminitis is the concern, immersing the hoof in ice water is one of the most established forms of cryotherapy. The goal is to cool the entire hoof capsule, rather than simply chilling the outer surface.

The water is important here—using ice suspended in water provides a more consistent transfer of cold than placing solid ice directly against the skin. Direct ice to skin contact can also increase the risk of cold related tissue damage, so this isn’t a situation where simply packing a hoof in ice is necessarily better.

4. Compression Cold Therapy Systems

Some newer systems combine cold therapy with gentle pulsing compression. They work on a similar principle to recovery systems used in human sports medicine, using compression alongside cooling to help manage swelling and encourage fluid movement through the tissues.

These systems are becoming more common in performance barns, particularly for horses recovering from strenuous exercise or dealing with lower limb swelling.

5. Handheld Cryotherapy Devices

Another newer option uses pressurized CO₂ to deliver an extremely cold stream of gas to a specific area for a short period of time. These devices can rapidly lower the surface temperature of a targeted area, making them useful when you need to treat a particular joint or small area of swelling rather than an entire leg.

Because the treatment is so concentrated, these devices are generally best left to trained professionals who know how to use them safely.

6. Whole Body Cryotherapy Chambers

Whole body cryotherapy is probably the most futuristic looking form of equine cold therapy. These chambers surround most of the horse’s body with extremely cold nitrogen cooled air or mist while the horse’s head and neck remain outside the chamber. Sessions are typically very short, usually lasting just a few minutes.

This technology was adapted from human sports medicine and has gained attention in high level racing and competition settings. Supporters say the brief exposure is intended to trigger a broader physiological response rather than simply cooling a specific injured area.

One of the most important uses of cryotherapy is helping prevent laminitis in horses that are at high risk. In certain situations, cold therapy has become an important part of veterinary care rather than simply an optional treatment.

Horses recovering from conditions such as colic, colitis, retained placenta, or other illnesses involving systemic infection or endotoxemia can be at serious risk of developing secondary laminitis. Once laminitis develops, treatment becomes much more difficult and the prognosis can be worse. Research has consistently shown that cooling the lower limbs and hooves, known as distal limb cryotherapy, can significantly reduce the risk of laminitis in horses with these underlying conditions.

The protocols supported by research generally involve keeping the hoof wall quite cold, around 5°C to 10°C (41°F to 50°F), and starting treatment as early as possible—ideally before signs of laminitis appear.

Keep in mind that cooling may need to continue for 48 to 72 hours or until the underlying illness has resolved. That’s a long time to keep a horse in treatment, especially when it may involve keeping the feet in ice water boots around the clock. That’s why treatment systems that allow horses to move around while receiving cryotherapy can make such a difference

Cryotherapy isn’t just useful during a laminitis emergency. It also has a legitimate place in everyday care and rehabilitation, especially for horses that are regularly working hard.

• Tendon and ligament strains are one of the most familiar uses. If a horse comes back from a hard gallop or takes a bad step and develops a hot, swollen leg, cold therapy can help control the initial inflammation. It’s most useful when started early, particularly during the first 24 to 48 hours after an acute injury.

• Post-surgical swelling is another common application. Cold therapy is often included in recovery plans following joint and soft tissue surgery because it can help manage the swelling and discomfort that naturally occur after an invasive procedure.

• For horses in heavy work, cryotherapy is also increasingly used as part of routine recovery rather than being saved only for obvious injuries. High level eventers, jumpers, and racehorses may receive cold therapy after demanding sessions to help manage the minor inflammation and tissue stress that come with repeated hard work.

• There’s also growing interest in using cryotherapy for horses on stall rest. Some practitioners using cryotherapy report that it may help with the loss of muscle tone that can occur when a horse’s movement is restricted.

Cold therapy has a good safety record compared with many other treatments used in equine medicine, but that doesn’t mean there’s no room for mistakes.

• Frostbite and tissue damage risks increase when ice is placed directly against the skin for an extended period without water or another protective barrier. It can be an easy mistake to make when using a basic ice pack, but properly designed boots and wet cooling methods are intended to reduce this risk.

• Skin irritation and hair loss can be common side effects of prolonged cryotherapy. They’re usually temporary and improve once treatment is stopped.

• Limited movement can also become a concern during extended treatments. A horse receiving cryotherapy for 48 to 72 hours may spend a lot of time standing in place, so they need to be monitored for pressure sores, digestive problems related to reduced movement, and signs of stress or discomfort.

• There’s also the practical side to consider. Cost and time aren’t safety concerns in themselves, but they can affect how realistic a treatment plan is. Commercial cryotherapy systems and whole body chambers can be expensive, while even something as simple as cold hosing requires someone to be there consistently. The best treatment is one that can be performed correctly and monitored throughout the entire process.

A few basic principles apply to almost every situation where you’re using cold therapy:

• Start as early as you can. Cold therapy tends to be most useful when it’s started soon after an injury or when inflammation begins. Waiting too long gives the inflammatory response more time to develop, which can make it harder to control.

• For longer treatments, water is your friend. An ice and water mixture distributes cold more evenly and safely than placing ice directly against the skin. The water also helps prevent the uneven cooling that can happen with solid ice.

• Choose the treatment based on what you’re trying to accomplish. A cold hose or ice boot may be all you need for a swollen leg after a hard workout. A horse at risk of laminitis after a serious illness may need continuous hoof cooling for an extended period. For a small specific area of soreness, a targeted device may make more sense.

• The length of treatment depends on the goal. Short repeated sessions can be useful for managing acute swelling, while laminitis prevention may require continuous cooling for 48 to 72 hours. Whole body cryotherapy is different again, with sessions lasting only a few minutes because the goal is to trigger a broader physiological response rather than continuously cool a specific area.

• And when you’re dealing with anything more serious than routine post-exercise swelling, get your veterinarian involved. Cryotherapy can be an extremely useful part of treatment, but it shouldn’t replace figuring out what’s actually causing the problem. If a horse has a leg that stays hot or keeps swelling despite cold therapy, that’s a reason to call your vet rather than simply trying a stronger or more expensive cooling system.

Equine cryotherapy has earned its place in horse care through decades of practical use and a growing body of research. When cold is applied correctly, it can be a valuable tool for managing inflammation, protecting tissue, and supporting recovery.

The treatment can look very different depending on the situation—it might mean a few minutes with a cold hose after a workout, an ice boot for a strained tendon or ligament, or continuous hoof cooling for a horse at risk of laminitis after a serious illness.

No matter which method you’re using, the fundamentals remain the same. Cold can be incredibly useful, but timing, technique, and choosing the right treatment for the situation all matter. Taking the time to do it properly is what makes cryotherapy an effective part of your horse’s care.