Arthritis does not automatically end a performance career. How well a horse keeps working usually comes down to how early the problem is picked up, and how well treatment, workload and daily management are planned together.
Key takeaways
- Arthritis does not automatically end a horse’s performance career.
- Good management combines veterinary treatment with workload and daily management decisions.
- Appropriate, controlled movement often remains important, but workload must respond to the horse’s symptoms and diagnosis.
- Recognising a change in performance early gives you and your vet more room to manage the horse effectively.
You usually notice it first. A horse that takes longer to warm up, feels short on one rein, or can’t quite finish its work the way it did a month ago. None of it looks like lameness yet, but it is already costing you.
Once a joint problem is suspected, it can feel like a choice between protecting the joint and keeping the preparation on track. That is usually the wrong way to frame it. Osteoarthritis (OA) is the most common joint problem in horses, accounting for more than 60% of equine lameness, and plenty of affected horses keep performing. The ones that do tend to have a plan that treats the joint, the workload and the horse’s daily management as one job, with trainer and vet working from the same picture.
This article covers what that plan looks like once a joint problem is on the table. For reducing the risk of joint damage in the first place, see our practical guide to preventing joint damage in performance horses.
What is osteoarthritis in horses? Osteoarthritis is a progressive disease of the whole joint. It involves the cartilage, the synovial membrane that lines the joint, and the surrounding bone and soft tissue, and it causes pain, stiffness and lameness that tend to worsen over time.
What is synovitis? Synovitis is inflammation of the synovial membrane. It is often the earliest joint problem that can be detected and treated, and ongoing inflammation in the joint lining contributes to the progression of osteoarthritis.
Can a horse with arthritis continue to train and compete?
Many horses with arthritis can stay in work and keep competing when the condition is well managed. Whether your horse can depends on which joint is affected, how advanced the disease is, how much pain the horse is in, the workload its discipline demands, and how it responds to treatment.
Staying in work is not the same as carrying on as if nothing has changed. A horse can often keep moving and training in a controlled way while its high-load work, such as fast gallops or jumping sessions, is adjusted. Performance goals have to stay compatible with the horse being comfortable and sound.
This is an ongoing job. Osteoarthritis has no known cure, and management aims to keep the horse comfortable, maintain function and slow the disease, so the plan runs across the season rather than around a single treatment. Agree with your vet what the horse is being aimed at and what workload is realistic.
What signs suggest arthritis is starting to affect performance?
A drop in performance often shows up before obvious lameness. Small changes that repeat from session to session are worth having your vet investigate, even when the horse still looks sound in hand.
Changes worth raising with your vet include:
- A shorter or altered stride, or unevenness on one rein or lead.
- A longer warm-up, or stiffness after rest that eases once the horse is working.
- Less willingness, rhythm or consistency in work.
- Slower recovery after work, a change in behaviour, or difficulty completing the usual workload.
- Heat or swelling (effusion) around a joint.
One off-day is not a pattern. The same change showing up across several sessions is. For a fuller list of the signs of joint problems, see our horse owners and trainers page.
What should an arthritis management plan include?
No single intervention manages every horse. An effective plan combines veterinary treatment of the joint with the factors that affect how much load that joint carries and how well the horse copes with its programme.
Veterinary guidance identifies specialised trimming or shoeing, weight loss for overweight horses, and exercise of appropriate duration and intensity as parts of managing osteoarthritis. In practice, each part has a job for you and a job for your vet.
| Management lever | Trainer action | Veterinary role |
| Assessment | Report what you see and whether it repeats | Confirms the joint, severity and source of pain, and rules out other causes |
| Exercise | Adjust intensity and build workload gradually | Advises what workload suits the diagnosis |
| Hoof balance | Keep a regular farrier schedule | Works with your farrier on trimming or shoeing changes |
| Surfaces | Choose consistent footing | Advises on surfaces for the affected joint |
| Body condition | Keep the horse at an appropriate weight | Advises if condition is adding unnecessary load |
| Treatment | Plan timing around the programme | Recommends, administers and reviews treatment |
| Monitoring | Record stride, warm-up and recovery | Schedules reassessment and adjusts the plan |
Should a horse with arthritis rest or keep exercising?
Complete rest is not automatically the goal. Controlled, appropriate exercise can help maintain mobility, while too much load can aggravate the joint, so the right level sits between the two and is set for the individual horse.
There is no universal exercise prescription for an arthritic horse. Where your vet agrees it is appropriate, keeping the horse moving is usually preferable to long periods of box rest. The useful distinction is between keeping the horse moving, which is often right, and keeping it in normal training, which may need to change.
Adjust intensity before removing all work. Fewer or shorter fast sessions, a longer warm-up, gradual loading and planned recovery days can help a horse hold fitness without overloading the joint. If comfort or gait gets worse, reduce or stop the work and get the horse reassessed rather than training through it.
How can training, surfaces and hoof care reduce unnecessary joint load?
Treatment works best when the things that load the joint are managed as well. If the surface, the shoeing or the shape of the programme stay the same, they can undermine a treatment that is otherwise working.
For a horse already being managed for arthritis, consider:
- Surfaces. Consistent footing matters more than any single surface type. Very hard ground increases concussion, while deep or uneven ground adds strain.
- Workload spikes. Sudden jumps in intensity, and a lot of repetitive work in the same direction or pattern, concentrate load on the joints.
- Hoof balance. An individual farriery assessment, ideally informed by your vet’s findings, helps the limb load as evenly as possible.
- Body condition. Extra weight is extra load on every stride.
- The joint and the discipline. Programme changes should reflect the affected joint and the work the horse does.
What veterinary treatments can form part of arthritis management?
The right treatment depends on the horse, the affected joint, the stage of disease and what the horse is being asked to do. There is no universal best option, and the options work in different ways, so they are not interchangeable.
| Option | General role | Factors the vet considers |
| Non-steroidal anti-inflammatories (NSAIDs), such as phenylbutazone (Bute) | Pain and inflammation relief, often short term | Duration of use and side effects; competition with-hold times; pain relief does not treat the disease itself |
| Intra-articular corticosteroids | Reduce inflammation within the joint | Joint, disease stage, agent, frequency of use and overall health, including equine metabolic conditions |
| Hyaluronic acid | May support the joint fluid, often combined with a corticosteroid | Disease stage and whether it is combined with other treatment |
| Orthobiologics, such as platelet-rich plasma (PRP) and autologous conditioned serum (e.g. IRAP) | Products made from the horse’s own blood that aim to modulte joint inflammation | Preparation method, number of injections, time and cost |
| 2.5% polyacrylamide hydrogel (Arthramid) | A hydrogel that integrates into the synovial membrane to support long-term joint health | Confirming the lameness comes from the joint, and timing within the programme |
| Surgery and other interventions | Arthroscopy for problems such as bone fragments, or joint fusion in selected cases | Imaging findings, the joint involved and the horse’s intended use |
Where can Arthramid fit into a performance horse’s management plan?
Arthramid is a veterinarian-administered 2.5% injectable polyacrylamide hydrogel (iPAAG) used to treat joint lameness in horses. It is one option within a wider management plan, and your vet decides whether it suits your horse and the joint involved.
Most joint injections act on the joint fluid or on inflammation. Arthramid works differently: the gel integrates into the synovial membrane, the lining of the joint, supporting the joint over the longer term. In Australia it is registered with the APVMA (No. 86728) for the treatment of lameness in horses, and it is a prescription product available only through veterinarians.
The most relevant evidence for trainers comes from racing. In a 2021 double-blinded study of 31 flat-racing Thoroughbreds in training with lameness localised to the middle carpal joint (the knee), lameness had resolved at six weeks in 83% of joints treated with 2.5% polyacrylamide hydrogel, compared with 27% of joints treated with triamcinolone acetonide, a corticosteroid, and 40% treated with sodium hyaluronate. These results apply to that population and that joint. They are relevant to racing stables, but they do not guarantee the same response in every horse or every joint.
Horses often show gradual improvement within the first week, with continued progress over the following weeks, so it is worth planning treatment with your vet around the programme, such as earlier in a preparation, rather than close to a target. Arthramid sits alongside workload management, farriery, rehabilitation and follow-up, not in place of them.
Talk to your veterinarian about your horse’s joint health and whether Arthramid may be appropriate as part of its management plan. You can find post-treatment guidance and more detail on our horse owners and trainers page.
How should performance be monitored after treatment or management changes?
Judge progress on repeatable measures of soundness, comfort and how well the horse tolerates its planned workload, not on a single good session.
Track the same things that flagged the problem:
- Consistency of stride and movement on both reins or leads.
- How long the horse takes to warm up and whether stiffness after rest returns.
- Recovery after fast or demanding work.
- Whether the horse can sustain its planned workload.
- Any return of stiffness, swelling or lameness.
Keep a planned veterinary reassessment in the diary, and bring it forward if lameness returns, a joint swells again, stiffness worsens, or the horse cannot hold the workload it was coping with.
