Many riders think of taking their horse into water as a fun outing. But water can also be a serious training and recovery tool. Equine hydrotherapy is used by racing yards, top eventers and happy hackers alike, and it can help with everything from tendon injuries to general fitness.
This guide explains what equine hydrotherapy is, how it works, the different types available and what to expect when you book your horse in for treatment.
Table of Contents
What Is Equine Hydrotherapy?
Equine hydrotherapy is any treatment that uses water to improve a horse's health, fitness or recovery. It can be as simple as running a hose over a swollen leg, or as advanced as a structured programme on an underwater treadmill at a rehabilitation centre.
A Treatment with a Long History
Horse owners have used water informally for centuries. Racehorse trainers took their horses to the sea to swim and walk through the waves, and they noticed the cold water and buoyancy seemed to refresh and heal the animals. Some show jumpers still do this today, taking their horses to the beach between competition days.
What has changed is the science and the equipment. Hydrotherapy is now a formal treatment for many musculoskeletal conditions, and vets often include it in rehabilitation plans.
How Does Equine Hydrotherapy Work?
Water affects a horse's body in several ways at once. Each type of hydrotherapy uses these effects differently.
Buoyancy
Water supports part of the horse's weight. This takes pressure off the joints, tendons and ligaments, so a horse recovering from an injury can move without the full load it would carry on land. Overweight horses can also exercise with less strain on their lower legs.
Resistance
Water is far thicker than air, so every step takes more effort. This builds muscle and strength without the pounding of work on hard ground. It also changes the way muscles fire, which helps both injured horses and athletes training for better performance.
Hydrostatic Pressure
Deeper water presses evenly on the legs. This pressure helps reduce swelling (oedema), improves circulation and supports the joints.
Temperature
Cold water numbs pain and reduces inflammation, much like an ice pack on a sprained ankle. Warm water does the opposite job, relaxing tight muscles and boosting blood flow. The right temperature depends on the injury.
Types of Equine Hydrotherapy
There are four main types of equine hydrotherapy, plus the option of using natural water such as the sea or a dam. Each suits different goals.
Swimming
Horses swim in purpose-built equine pools, which may be round or long and narrow with a ramp at each end. Handlers usually walk alongside on either side, guiding the horse with lead ropes.
Swimming is excellent cardiovascular exercise, and it puts no concussion on the limbs. This makes it popular for racehorses and for horses with lower leg injuries that still need to stay fit. Petplan Equine vet Gil Riley estimates that eight laps of an oval pool in each direction gives about the same fitness benefit as two brisk canters.
Swimming does have drawbacks. A swimming horse holds its head high, which hollows the back and can strain the muscles along the topline. The movement also works the stifles hard. For this reason, swimming is not usually recommended for horses with back, neck or upper leg injuries, and dressage riders may want to use it in moderation.
Water Treadmills
A water treadmill looks like a large horsebox with a moving floor. The horse walks in, the door closes and the chamber fills with water to the chosen depth. The horse then walks on the treadmill while the water provides resistance and support.
Treadmills encourage a horse to sit back and take weight off its forehand. Horses also take longer, slower strides in water than on land. This makes treadmills useful for back and pelvic injuries, joint inflammation and soft tissue rehabilitation.
Treadmills do not raise the heart rate and breathing as much as swimming does. So if your main goal is to build lung capacity and stamina, swimming may be the better choice. Some treadmills are mobile and travel to shows and yards, which saves you transporting your horse.
Cold Saltwater Spas
A cold saltwater spa is a static tank where the horse stands in chilled, salty water. The water is usually kept between 2°C and 4°C and has a higher salt content than seawater. Many spas also use air jets to massage the legs.
The cold numbs pain, while the salt draws excess fluid out of the tissues, working like a natural poultice. Spas are used for tendon and ligament injuries, wounds, windgalls, sore shins and laminitis. Because the treatment is drug-free, it suits competition horses that cannot receive certain medications before an event. Some centres, such as Gilvarry Equine in Noordhoek, Cape Town, note that spa treatment is safe even for pregnant mares and young foals.
Cold Hosing
Cold hosing is the one type of hydrotherapy you can do at home. You simply run cold water over the injured area. It reduces heat, swelling and pain, and helps stop fluid building up in the leg.
Timing matters. Cold hosing in the first hours after a tendon injury can limit damage caused by acute inflammation. Gil Riley advises hosing a leg for about five minutes at a time, every 30 minutes, to avoid problems with circulation. Cold hosing is also a good choice for large wounds, as it encourages healthy granulation tissue to form.
If your horse has a skin condition that salt might irritate, cold hosing is a gentler alternative to a spa.
Benefits of Equine Hydrotherapy
The benefits depend on the type of therapy used, but most horses gain in one or more of these areas.
Faster Injury Recovery
Hydrotherapy gives horses a middle ground between complete box rest and returning to work too quickly. A horse with a tendon injury, for example, can keep some muscle and fitness while the leg heals, rather than losing condition over months of stable rest.
Fitness and Conditioning
Healthy sport horses use hydrotherapy to get fit without the strain of their discipline. It works like a person going to the gym to prepare for a sport. Dressage horses may use it before an event and eventers afterwards to recover. Riders often say their horses feel fitter, straighter, more supple and more relaxed after treadmill sessions.
Pain Relief and Reduced Inflammation
Cold water and salt reduce swelling and ease pain without medication. This helps horses with arthritis and other chronic conditions that cause stiffness.
Mental Wellbeing
Many horses find water calming once they are used to it. Hydrotherapy also breaks up a routine for a horse that is bored with schooling, and gentle water work lets horses exercise on hot days without overheating. It can also keep a horse fit while its rider is injured.
Which Horses Can Benefit?
Almost any horse can benefit from some form of hydrotherapy. Common candidates include horses with tendon and ligament injuries, horses recovering from joint surgery, older horses with arthritis, overweight horses and competition horses in training.
That said, not every type suits every horse. A horse with a neck injury may do well on a treadmill but should not swim. Always work with your vet to choose the right option.
How to Introduce Your Horse to Hydrotherapy
Start Gradually
Most horses need time to accept the equipment. On a treadmill, a horse usually starts walking in a dry chamber before water is added over several sessions. In a pool, horses often begin by walking in straight lines before moving on to swimming laps.
Understand the Swimming Reflex
When a horse's feet first leave the ground in deep water, it will usually hold its breath for around 15 to 20 seconds. This raises the heart rate, so bear it in mind when planning cardio work. Most horses also carry their heads lower and relax more after a few sessions.
Choose the Right Depth
Very shallow water makes a horse lift its feet higher, which can defeat the purpose if you want it to work against the water. Going slightly deeper usually gives better results.
Put Safety First
Never leave a horse unsupervised in or near water. If you use the sea or a dam, check the ground first for sudden drop-offs, boggy patches, rocks and weeds.
What to Expect at a Hydrotherapy Centre
The Session
A water treadmill session usually lasts up to 20 minutes. At Hartpury Equine Therapy Centre in the UK, two people hold the horse while a third runs the machine, and the horse's tail is wrapped to keep it dry. The whole visit, from unloading to loading, takes about half an hour.
Treatment Plans
Horses can visit for single sessions or stay on therapy livery for weeks or even months. The centre will usually create a weekly plan and explain each step to you. Some centres accept horses without a vet referral, but they will contact your vet if the horse is being treated for an injury.
Results
Cold spa and hosing effects are often visible straight away but may not last, so several sessions are usually needed. Treadmill and swimming results take longer to show. The more serious or long-standing the condition, the longer the programme.
How Much Does Equine Hydrotherapy Cost?
Costs vary widely between facilities. The price depends on the type of therapy, the number of sessions and whether your horse boards at the centre or travels in for each visit. Contact your local centre for a quote.
If your horse is insured, check your policy. Some insurers cover hydrotherapy when a vet carries it out or refers the horse for it. Treatment without vet approval is usually not covered.
Combining Hydrotherapy with Other Treatments
Hydrotherapy often works best as part of a wider rehabilitation plan. Your vet may pair it with laser therapy, shockwave therapy, pulsed electromagnetic field (PEMF) therapy, vibration plates, acupuncture, injections or regenerative treatments, depending on the condition.
Final Thoughts
Equine hydrotherapy is a versatile, drug-free tool that can help your horse heal, get fitter and feel better. Whether you choose a spa for a swollen tendon, a treadmill for back rehabilitation or simple cold hosing in your own yard, speak to your vet first to find the right approach for your horse.
Frequently Asked Questions About Equine Hydrotherapy
Does My Horse Need a Vet Referral for Hydrotherapy?
Not always. Some centres accept horses for fitness work without a referral. If your horse is being treated for an injury, though, the centre will usually want to speak to your vet first to make sure the treatment is safe. A vet referral also matters if you plan to claim the cost from your horse's insurance.
How Often Should My Horse Have Hydrotherapy Sessions?
This depends on your horse's condition and the type of therapy. A horse recovering from a tendon injury might have several treadmill or spa sessions a week, while a healthy sport horse may use hydrotherapy once or twice a week as part of its training. Your vet or the centre will set a schedule based on your horse's progress.
Can All Horses Swim?
Most horses can swim naturally, but not all of them are comfortable in deep water at first. Nervous horses need a slow introduction, often starting with walking in shallow water. Swimming is also not suitable for every horse. Those with back, neck or stifle problems may be better suited to a water treadmill or spa.
Is Cold Hosing as Effective as a Saltwater Spa?
Both reduce heat, pain and swelling, but they suit different situations. A spa treats the whole lower leg at a steady cold temperature, and the salt helps draw out excess fluid. Cold hosing is better for targeting a specific area, such as a wound, and you can do it at home straight after an injury. For horses with sensitive skin that salt might irritate, cold hosing is the gentler option.
Can Hydrotherapy Help an Older Horse?
Yes. Older horses often suffer from arthritis and stiff joints, and the buoyancy of water lets them exercise with less strain. Cold saltwater spas can also ease inflammation in sore legs. Speak to your vet before starting, as older horses may have other health issues that affect which type of hydrotherapy is safe for them.
