Many horses diagnosed with pituitary pars intermedia dysfunction (PPID)—the condition commonly called equine Cushing’s disease—can remain in light or moderate work. The diagnosis alone does not answer whether a particular horse is safe to ride. The decision should be based on veterinary assessment, hoof comfort, disease control, fitness, weather, and the horse’s response to exercise.
PPID is a progressive endocrine disorder. It can affect immune function, muscle, sweating, body condition, thirst and urination, and the risk of laminitis. A horse that was comfortable last month may need a different workload after a hoof problem, infection, medication change, or unusually hot weather. Treat this as an individual management question, not a breed- or age-based yes/no rule.
What PPID means for riding
PPID is associated with abnormal hormone regulation involving the pituitary gland. Common signs include a long or delayed-shedding coat, recurrent infections, excessive drinking and urination, muscle loss, abnormal fat distribution, and a history of laminitis. Not every horse shows the classic coat, and several signs overlap with other conditions.
A veterinarian may use clinical signs together with blood testing, often including ACTH testing interpreted with the laboratory’s seasonal guidance. A single result should not be treated as a complete answer in isolation. The UC Davis Center for Equine Health emphasizes veterinary diagnosis and a veterinarian-approved diet and exercise plan; treatment and monitoring should be individualized.
When riding may be reasonable
Riding may be reasonable when the horse is comfortable at the walk and intended work level, has no active laminitis or unexplained lameness, is eating and drinking normally, and has a veterinary plan for PPID and any related problems. A horse that is older or less fit may be better suited to walking, gentle hacking, ground work, or short sessions rather than strenuous schooling.
Before tacking up, check for a normal attitude and appetite, heat or a stronger-than-usual digital pulse, foot tenderness, stiffness, swelling, abnormal breathing, or signs of dehydration. Do not use exercise to “test” a horse that is already lame or acutely unwell. If there is any doubt, call the veterinarian first.
When not to ride
- Active or suspected laminitis, foot pain, lameness, or a sudden change in gait.
- Fever, respiratory illness, significant weakness, dehydration, or a new infection.
- Heat stress risk, especially when the horse cannot cool itself normally or has a heavy coat.
- Unexplained weight loss, marked muscle weakness, collapse, or poor recovery after easy work.
- A recent medication, diet, hoof-care, or diagnostic change that has not yet been reviewed.
Laminitis is an emergency concern. Heat in the feet, a bounding digital pulse, reluctance to move, a rocked-back stance, or a sudden pottery gait warrants prompt veterinary advice—not a ride.
Build a safer exercise routine
Start below the horse’s current limit
Begin with a generous walk warm-up, then use short intervals at the planned gait. Increase only one variable at a time—duration, frequency, speed, or difficulty. Finish while the horse is still moving comfortably rather than waiting for fatigue to appear.
Choose footing and tack carefully
Use level, secure footing suited to the horse’s hoof condition. Avoid deep, slippery, frozen, or excessively hard ground when it increases the risk of discomfort. Check saddle fit and tack as you would for any horse; pain from equipment can look like poor fitness or “bad attitude.” Keep the rider’s goals secondary to soundness and welfare.
Manage heat and recovery
PPID can interfere with normal sweating in some horses, while a long coat can make heat management harder. Avoid the hottest part of the day, offer water, use shade and airflow, and allow a gradual cool-down. Learn the horse’s normal breathing and recovery pattern. Heavy sweating, distress, weakness, wobbliness, or failure to cool down is a reason to stop and contact a veterinarian.
Management matters as much as the ride
Riding decisions sit inside the wider PPID plan. Give prescribed medication exactly as directed and keep follow-up appointments. Maintain regular hoof care and monitor for laminitis. Diet should be designed with the veterinarian or an equine nutrition professional, especially when the horse is overweight, insulin-dysregulated, or prone to laminitis. Do not make abrupt feed changes based on an internet checklist.
Keep a simple log of medication, appetite, water intake, coat changes, hoof comfort, exercise, weather, and recovery. Patterns in that record can help the veterinary team distinguish a training problem from a medical change. For broader feeding and senior-horse context, see our guides on forage-based feeding and estimating a horse’s age.
Practical decision checklist
- Has the horse been examined and diagnosed or monitored by a veterinarian?
- Are the feet comfortable, with no new lameness or laminitis warning signs?
- Is the horse hydrated, eating normally, and coping with the weather?
- Does today’s workload match the horse’s current fitness and recovery?
- Can you stop immediately and get help if the horse deteriorates?
If the answer to any of these is no or uncertain, choose rest or gentle in-hand movement only if the veterinarian has approved it. A conservative day is cheaper and kinder than turning a subtle health change into a serious setback.
Related horse-care guides
- Can horses run themselves to exhaustion?
- How cold can horses tolerate?
- Is rain rot contagious?
- Can a horse live on hay or grass alone?
Sources and veterinary follow-up
For further reading, consult the UC Davis Center for Equine Health PPID overview, the Merck Veterinary Manual entry on PPID-related disease, and The Horse’s discussion of testing. These resources do not replace an examination of your horse.
Frequently asked questions
Can you ride a horse with Cushing’s disease?
Many horses with pituitary pars intermedia dysfunction (PPID), formerly called equine Cushing’s disease, can continue some exercise. The safe level depends on the individual horse’s comfort, hoof health, disease control, fitness, weather, and any complications. Ask the attending veterinarian to set the plan.
When should you not ride a horse with PPID?
Do not ride when the horse is lame, foot-sore, acutely ill, weak, dehydrated, overheating, recovering from a laminitis episode, or showing a significant change in attitude or performance. Stop and seek veterinary advice if exercise reveals pain, stumbling, unusual fatigue, or worsening gait.
Is exercise helpful for a horse with PPID?
A veterinarian-approved exercise program can help maintain mobility and muscle, but exercise is not a substitute for diagnosis, pergolide or other prescribed treatment, hoof care, and diet management. Increase work gradually and adjust it to the horse’s current health.
What is the safest way to exercise a horse with Cushing’s?
Start with a long, easy warm-up and choose footing that is level, secure, and appropriate for the horse’s feet. Keep sessions short enough that the horse remains comfortable, avoid peak heat, provide water and recovery time, and record how the horse feels during and after work.

