How to Optimise Racehorse Performance

By Dr Duncan Houston

Good racehorse performance starts with a horse that can train comfortably, recover properly and arrive at the races healthy. Nutrition matters, but so do soundness, breathing, feet, track surfaces, sleep and the balance between training and rest.

When a horse starts finishing poorly or taking longer to recover, adding more grain or another hard gallop can miss the underlying problem.

The aim is consistent athletic performance while protecting the horse’s health, welfare and long-term soundness.

Quick Answer

Optimise racehorse performance by combining an individual training programme with balanced nutrition, appropriate recovery, good hoof care and a healthy stable environment. Monitor appetite, bodyweight, movement and recovery alongside training times so problems are recognised early. Investigate unexplained loss of performance before increasing workload, particularly when it comes with lameness, coughing, poor appetite or unusual fatigue.

Start with the individual horse and the intended race

Build the programme around the horse’s age, experience, injury history, temperament and intended racing distance.

A young Thoroughbred entering training, a seasoned stayer and a Standardbred returning after injury have different demands. Their feeding, conditioning and recovery plans should reflect those differences.

Consider:

• The distance and type of race.

• Current fitness and previous workload.

• Preferred surface and likely track conditions.

• Travel, climate and recovery between races.

• Previous respiratory, muscle or orthopaedic problems.

• Whether the horse remains physically and mentally comfortable in training.

Judge progress against that horse’s previous healthy performance under comparable conditions. A single finishing position cannot tell you whether fitness, health, race tactics or the strength of the field explains the result.

Build fitness while allowing the body to adapt

Training needs enough stimulus to develop fitness, with enough recovery to avoid accumulating injury.

Speed, distance, frequency and surface all affect the load placed on bones, joints, tendons and ligaments. Repeated loading can produce damage when repair cannot keep pace. This is why the total training history matters, including work between races.

An individual programme should include:

• A progressive return after a break.

• Appropriate preparation before faster work.

• Planned variation in workload.

• Recovery after demanding sessions.

• Regular reassessment of movement, attitude and soundness.

• Rest periods appropriate to the horse’s condition and campaign.

Avoid copying the programme of a successful stablemate without considering whether this horse tolerates it.

A horse that repeatedly becomes sore or flat at the same stage of training needs its programme reviewed before the workload increases.

Rest is a recognised part of racehorse healthcare. Its timing and form should be agreed between the trainer and veterinarian, particularly after injury or with conditions requiring carefully controlled exercise.

Treat track surfaces and terrain as part of the workload

Assess firmness, depth, grip, consistency and drainage. A surface can change substantially after rain, drying, maintenance or heavy use.

Very hard ground, deep going and uneven footing create different challenges. A softer track is not automatically safer, and a surface’s name alone does not describe how it behaves beneath the horse.

Hills also change the exercise demand. Include gradients and footing when assessing a session rather than comparing distance alone.

Inspect training areas for ruts, slippery patches and abrupt surface changes. Adjust work when conditions are unsuitable. Research on equine footing emphasises the interaction between surface properties, speed and repeated loading.

Build the diet around forage and measured requirements

Racehorses need sufficient energy for work, but they still have the digestive system of a grazing animal.

Provide suitable forage consistently and assess its quality. Laboratory testing helps identify what hay contributes before concentrates and supplements are added.

Hard-working horses often need additional energy beyond forage alone. The amount depends on bodyweight, workload, forage quality and individual metabolism. Weigh feeds rather than relying on the volume of a scoop.

Feed component	Useful role	What needs attention
Good-quality grass hay or suitable pasture	Provides forage, chewing time and nutrients	Actual intake, maturity, dust and seasonal variation
Lucerne or suitable mixed forage	Contributes protein, calcium and energy	Balance within the complete ration
Formulated performance feed	Supplies concentrated energy and nutrients	Suitability, feeding rate and meal size
Digestible fibre feeds	Provide additional energy from fermentable fibre	Product preparation and overall ration balance
Added fat	Increases energy density without relying entirely on more cereal grain	Gradual introduction and nutritional balance
Ration balancer or targeted mineral supplement	Corrects an identified nutritional gap	Duplication with fortified feeds and other supplements

An equine nutritionist can assess whether the complete ration supplies enough energy, quality protein, minerals and vitamins without unnecessary excess.

Avoid sudden feed changes and oversized grain meals

Large cereal meals can overwhelm the horse’s capacity to digest starch appropriately. Increasing grain suddenly because a horse looks tired is a poor substitute for investigating the cause.

Divide concentrates into suitable meals, preserve forage intake and introduce changes progressively. Feed transitions commonly take at least a week, with longer adjustments appropriate for some horses and diets.

Reassess the ration when workload changes. A horse beginning a rest period may need a different energy intake while still requiring adequate forage and balanced nutrients.

Record what the horse actually eats. Feed left in the manger is clinically useful information.

Monitor condition as well as bodyweight

Use repeat weights under similar conditions, together with hands-on body condition assessment and observations of muscle development.

Body condition scoring assesses fat cover. It does not measure fitness.

A falling weight trend may reflect inadequate intake, but dental disease, gastrointestinal problems and other illness also deserve consideration. Persistent loss despite apparently adequate feeding warrants veterinary assessment.

Avoid chasing a particular scale weight without considering hydration, gut fill, condition and the horse’s previous healthy baseline.

Make hydration and electrolyte replacement routine

Provide clean drinking water continuously and check automatic drinkers for flow, cleanliness and accessibility.

Sweating increases water and electrolyte losses. Requirements change with workload, temperature, humidity and the individual horse.

Plan salt and electrolyte provision with the veterinarian or nutritionist. Electrolytes need to accompany adequate water intake; they do not replace rehydration. Always provide plain water as an option when offering electrolyte-containing water.

After exercise, offer drinking water promptly. Do not withhold it simply because the horse is hot.

Monitor drinking after travel and demanding work. A horse that remains dull, drinks poorly or recovers abnormally needs assessment rather than repeated electrolyte dosing by guesswork.

Use supplements to solve a defined problem

Before adding a supplement, ask:

• What deficiency or clinical problem are we addressing?

• What evidence supports this ingredient for that purpose?

• Is it already present in the ration?

• What measurable improvement would justify continuing it?

Trace minerals are essential, but balance matters. Adding several fortified products can create inappropriate intake rather than better performance. Have the total ration assessed before adding products containing minerals such as selenium or copper.

Apply the same scrutiny to probiotics, joint products and products marketed for stamina or recovery. The label should prompt questions about evidence, dose and suitability.

Keep product names, ingredients and batch details in the horse’s records.

Protect stomach health without blaming every problem on ulcers

Gastric ulcers deserve consideration in a racehorse with reduced appetite, recurrent abdominal discomfort, weight loss or behavioural changes. However, those signs are not specific to ulcers.

Veterinary investigation may include gastroscopy, which allows direct examination of the stomach. The location and type of disease influence treatment.

Management remains important: provide appropriate forage access, review meal timing, reduce avoidable stress and reassess the exercise routine.

A horse that fails to improve with ulcer treatment needs reassessment for other causes. Continuing treatment indefinitely without reviewing the diagnosis can delay recognition of another problem.

Give the lungs a clean environment

A horse spends far more time breathing stable air than racing. Feed, bedding and ventilation therefore belong in any performance review.

Reduce exposure to dust and airborne irritants by:

• Selecting low-dust forage and bedding.

• Maintaining ventilation.

• Removing wet bedding and manure regularly.

• Keeping horses away from sweeping and other dusty activities.

• Reviewing nearby hay storage and the horse’s breathing zone.

• Assessing transport ventilation as well as stable conditions.

A stable can look clean while still containing harmful airborne particles. Where asthma is diagnosed, environmental management is a central part of treatment. Medication alone cannot compensate for continued exposure.

Persistent coughing or increased breathing effort needs veterinary attention. Record whether signs occur at rest, when feeding, during exercise or afterwards.

Provide shelter, social contact and proper rest

Provide shade, airflow and suitable protection from cold rain and wind. Reassess rugs as weather changes, particularly after exercise or when a horse has been clipped.

The stable should offer a dry, comfortable resting area with enough room for the horse to lie down safely. Horses need to lie down to obtain normal periods of REM sleep.

Support behavioural needs through appropriate turnout, companionship, forage access and a predictable routine. Where injury restricts movement, work with the vet on safe alternatives for social contact and enrichment.

Introduce unfamiliar environments and handling tasks gradually. Persistent agitation, box walking or reluctance to settle should prompt a review of discomfort, routine and environment.

Keep hoof care, teeth and equipment under review

Work with an experienced farrier and veterinarian to maintain hoof balance and appropriate shoeing for the horse and surface.

Inspect feet and shoes routinely. Repeated shoe loss, hoof cracks or altered movement should trigger a review rather than becoming accepted background problems.

Include dental examinations in the healthcare programme. Dropping feed, difficulty chewing or unexplained weight loss warrant attention.

Check saddle, bridle, bit and harness fit as applicable. Record pressure marks, mouth discomfort and changes in behaviour during tacking up.

A new resistance to handling or exercise is useful information. Investigate discomfort before labelling the horse difficult.

Track recovery as carefully as speed

Create a simple record that staff can complete consistently.

What to record	Why it helps
Appetite and feed left behind	Identifies changes in intake
Bodyweight and condition	Shows trends across the campaign
Exercise distance, speed, surface and weather	Makes comparisons more meaningful
Heart rate and recovery at agreed intervals	Helps identify changes during comparable work
Breathing, coughing and unusual respiratory noise	Guides respiratory investigation
Gait, limb swelling and muscle soreness	Identifies potential pain or injury
Drinking, manure and general demeanour	Provides context for health and recovery
Treatments, supplements and missed training	Links performance with management changes

Agree the monitoring method and escalation points with the veterinarian. A heart-rate reading has little value if the device is inaccurate or the exercise conditions differ substantially.

Specialist performance investigations can combine exercise observations with heart monitoring, airway examination and blood testing when indicated.

Compare like with like. A slower session in deep going or humid weather should not be interpreted in the same way as a decline under familiar conditions.

What can cause poor racehorse performance?

Several problems can produce the same outward result: a horse that cannot sustain its usual effort.

Pattern noticed	Important possibilities	What to discuss with the vet
Shortened stride, reluctance to accelerate or repeated soreness	Foot pain, joint disease, tendon or ligament injury, bone stress injury	Lameness examination and targeted imaging
Coughing, respiratory noise or unexpectedly poor exercise tolerance	Airway inflammation, infection or upper airway obstruction	Respiratory examination and appropriate airway testing
Poor performance associated with exercise-related lung bleeding	Exercise-induced pulmonary haemorrhage	Post-exercise airway assessment
Poor appetite, weight loss or recurrent mild colic	Gastric disease, dental problems, inadequate intake or other illness	Feeding review and targeted investigation
Stiffness, sweating and painful muscles after work	Exertional rhabdomyolysis, commonly called tying-up	Urgent assessment and muscle enzyme testing
Unusual weakness, collapse or unexplained exercise intolerance	Cardiac disease and other serious systemic problems	Urgent examination and cardiac testing where indicated

Performance investigations may need to assess the horse during exercise because some abnormalities are not evident at rest. Tests should follow the history and examination findings.

Exercise-induced pulmonary haemorrhage involves bleeding within the lungs. The absence of blood at the nostrils does not rule it out. Diagnosis can require examination of the airways after exercise.

How urgently should a change be investigated?

Level of concern	What it looks like	Action
Lower concern	An isolated disappointing result with normal appetite, movement and recovery	Review race circumstances and records; continue close observation
Concerning	Repeated decline, weight loss, persistent cough or altered willingness to work	Arrange veterinary assessment before increasing workload
Urgent	New lameness, limb swelling, fever, marked appetite loss or abnormal recovery	Stop strenuous work and contact the vet promptly, generally the same day
Emergency	Collapse, severe breathing difficulty, suspected fracture, severe colic or neurological signs	Stop exercise and obtain immediate veterinary help

A seemingly minor change becomes more important when it persists, worsens or appears alongside another abnormal sign.

Do not use a harder workout to test whether a potentially injured horse is really sore.

When is this an emergency?

Seek immediate veterinary help for:

• Collapse, inability to stand or severe incoordination.

• Severe breathing difficulty.

• Severe or persistent abdominal pain.

• Sudden severe lameness, an abnormal limb position or suspected fracture.

• Marked muscle pain, unwillingness to move or dark urine after exercise.

• Suspected heat illness with weakness, distress or abnormal behaviour.

Do not force a horse with suspected tying-up to keep walking. Stop exercise, keep the horse safe and contact the veterinarian. Further exercise can worsen muscle damage.

For suspected fracture, minimise movement and obtain veterinary instructions before attempting transport.

Respond quickly to heat stress

Heat risk depends on humidity, airflow, workload and acclimatisation as well as air temperature.

Plan demanding work for suitable conditions and have cooling facilities ready. A horse struggling with the heat needs immediate intervention.

If heat illness is suspected:

1. Stop exercise and call the veterinarian.

2. Remove tack when safe.

3. Begin continuous cooling with cold water over the body.

4. Use shade and airflow where available.

5. Offer water if the horse is alert and able to drink normally.

Do not delay effective cooling to scrape water off between applications. Continuous water application is effective, and cold water is appropriate for cooling a hot horse.

A distressed or unsteady horse should not be marched around simply to complete a routine cooling walk.

Prevent avoidable interruptions to training

Maintain a veterinary healthcare plan covering vaccination, dental care, parasite control and biosecurity.

For parasites, use an individual and property-based programme that includes appropriate faecal testing and checks of treatment effectiveness. Faecal egg counts help guide management, but a low count does not exclude every form of parasite disease.

Keep new arrivals and horses with potentially infectious signs under an appropriate separation plan. Avoid sharing drinking containers or equipment with sick horses.

After travel, pay particular attention to appetite, demeanour, temperature and respiratory signs. A horse that is unwell needs assessment before returning to demanding work.

Keep treatment and racing requirements aligned

The treating veterinarian, trainer and relevant racing authority should be involved when deciding whether a treatment is compatible with an upcoming event.

Rules differ between jurisdictions and racing codes. Do not assume that a treatment permitted elsewhere is permitted locally.

Maintain complete medication records and check supplements as well as prescription medicines. Racing Victoria identifies medication mismanagement and accidental contamination as causes of prohibited-substance detections.

A horse requiring treatment should receive appropriate care, with the racing schedule adjusted when necessary. Veterinary decisions should prioritise health and welfare.

Assess whether extra spending produces a worthwhile benefit

Track the cost of feed, supplements, investigations, treatments, transport and training alongside health and performance.

For optional additions, define what success would look like before spending more. Better appetite, maintained condition or a measurable improvement in a diagnosed problem may be useful outcomes.

Avoid changing several optional products at once. It becomes difficult to determine what helped.

Diagnostic work can have value even when it leads to a spell, a different programme or retirement. The result may be preventing further injury rather than producing a faster race.

A practical performance improvement plan

1. Establish the baseline. Assemble training, feeding, veterinary and racing records from a period when the horse was performing well.

2. Check health and soundness. Investigate unexplained changes before increasing workload.

3. Audit the ration. Weigh feeds, assess forage and review every supplement.

4. Review the training programme. Include speed, distance, surfaces, recovery and recent breaks.

5. Inspect the stable routine. Check drinking, airflow, bedding, resting opportunities and social contact.

6. Choose targeted changes. Agree priorities between the trainer, vet, farrier and nutritionist.

7. Set review points. Monitor daily wellbeing and assess longer-term trends at planned intervals.

For a healthy horse undergoing routine management changes, a weekly team review can keep observations connected. Clinical abnormalities need attention when they appear.

Common mistakes to avoid

• Increasing workload before investigating a performance decline.

• Adding grain without assessing the complete ration.

• Treating every behavioural or appetite change as gastric ulcers.

• Allowing dusty housing or inadequate recovery to become routine.

• Continuing exercise through new lameness or muscle pain.

• Spending heavily on supplements without defining their purpose.

Can better feeding make a racehorse faster?

It can help when nutritional intake is limiting health or performance. Once requirements are met, additional feed does not guarantee more speed and may create other problems.

How much rest does a racehorse need?

There is no single schedule suitable for every horse. Workload, age, injury history and recovery determine the plan. Rest after injury should follow veterinary guidance.

Why is my racehorse getting slower despite more training?

Possible explanations include accumulated fatigue, pain, respiratory disease, inadequate intake or an unsuitable programme. Repeated decline warrants assessment before further increases in training.

Are performance supplements worth buying?

Some are useful for a defined nutritional or clinical need. Evaluate the evidence, complete ration, racing requirements and measurable benefit before continuing them.

Can a horse return to its previous performance after treatment?

Sometimes, depending on the diagnosis and its severity. Some horses recover well; others need a modified programme, prolonged rehabilitation or retirement. The prognosis should follow the diagnosis.

Build a programme the horse can sustain

The strongest performance programme connects daily observations with feeding, training and veterinary decisions.

A healthy horse should be able to eat, move, rest and recover comfortably. When one of those changes, investigate early. Protecting those foundations gives the horse the best opportunity to perform consistently within its individual ability.

ASK A VET™ supports informed animal-health decisions. Bring your horse’s training records, feeding details and recovery observations to your equine veterinarian so performance improvements are built around the horse’s health, comfort and long-term soundness.