How Much Weight Can a Horse Carry? The 20% Rule and Its Limits

By Dr Duncan Houston

“How much weight can my horse safely carry?” sounds like a question that should have a simple mathematical answer.

Multiply the horse’s weight by 20%, subtract the saddle, and there you have it.

In reality, that calculation is only the beginning. A sound, well-conditioned horse working briefly on level ground is not facing the same challenge as an unfit horse carrying the same percentage for several hours over hills in hot weather. Saddle fit, rider balance, muscle development, pain, age and workload can all change what is reasonable.

Quick Answer

A commonly used starting guideline is that the combined weight of the rider, clothing, saddle, tack and equipment should not exceed approximately 20% of the horse’s healthy body weight.

However, 20% is not a guaranteed safe limit for every horse. I would treat approximately 15% as a more conservative starting zone, 15% to 20% as a range requiring individual assessment, and anything above 20% as needing particular caution. Research has not established one universal safe percentage for every horse, breed, rider and workload. (ScienceDirect)

Is the 20% Rule Scientifically Proven?

No.

The 20% rule is a practical guideline, not a biological law. It is often attributed to historical cavalry manuals, but even the 2008 research paper commonly used to support the rule stated only that the recommendation may have originated from 1920 US cavalry guidance. Its exact historical origin is less certain than many articles imply. (ScienceDirect)

More importantly, no study has shown that:

• Every horse is safe at 20%

• Every horse becomes unsafe at 21%

• A horse carrying 15% cannot develop back pain

• A conditioned horse can never tolerate more than 20%

• Short-term physiological tolerance guarantees long-term soundness

The percentage is best used as a screening tool that starts a welfare assessment, not a number that ends the discussion.

What Did the 2008 Weight-Carrying Study Actually Find?

The frequently quoted study was published in the Journal of Equine Veterinary Science in 2008.

Eight mature light riding horses completed a mounted submaximal exercise test while carrying total loads equal to:

• 15% of their body weight

• 20% of their body weight

• 25% of their body weight

• 30% of their body weight

Researchers monitored heart rate, blood lactate, creatine kinase activity, muscle soreness and muscle tightness.

They found:

• Heart rates remained significantly higher when horses carried 25% and 30%

• Blood lactate was higher at 30% than at the lower loads

• Horses tended to develop more soreness and muscle tightness at 25%

• Soreness and tightness increased significantly at 30%

• Horses with wider loins and greater cannon-bone circumference tended to become less sore under heavier loads

These findings support caution as the load rises above approximately 20%, but they do not prove that 20% is a universal safe maximum. (ScienceDirect)

Important limitations

The study involved only eight horses and assessed responses to one standardised exercise test.

It did not determine:

• Long-term injury risk

• The effects of repeated daily loading

• Safe limits for jumping

• Safe limits for several-hour trail rides

• The effect of steep or unstable terrain

• The effect of extreme heat or humidity

• Safe limits for young, senior, lame or poorly conditioned horses

• The consequences of different saddle and rider combinations

The correct conclusion is not, “Science proved the 20% rule.”

It is, “Physiological effort and soreness increased as the load approached 25% to 30% in this small group of horses.”

Why Do More Recent Studies Seem to Disagree?

Different studies have used different horses, riders, exercise intensities, durations, gaits and saddle arrangements.

That matters enormously.

Low-intensity work at ratios up to 23%

A 2020 randomised crossover study examined 20 established horse-and-rider combinations. Researchers increased each rider’s weight by 15% and then 25%, creating total rider-and-tack ratios ranging from 15% to 23%.

During a short, low-intensity dressage test, the added weight did not produce significant changes in heart rate, salivary cortisol, behaviour or the measured gait-symmetry variables.

The authors specifically warned that the results should not be extrapolated to more intense work, higher ratios or long-term loading. (MDPI)

This tells us that a short period of light work near or slightly above 20% does not automatically cause measurable distress in every horse.

It does not prove that 23% is safe for a three-hour trail ride, repeated jumping or daily riding.

Temporary lameness with heavier riders

Another small pilot study used six horses and four skilled riders of different sizes. Rider-to-horse weight ratios ranged from approximately 10% to 27.5%.

All tests involving the two heavier rider categories were stopped because of temporary lameness or pain-related behaviour. However, saddle fit for the larger riders was not ideal, and the researchers could not separate the effects of weight, rider dimensions, position and saddle fit. (Beva Online Library)

This study is clinically important because it demonstrates that the same percentage may behave very differently when the saddle cannot accommodate the rider correctly.

Icelandic horses carrying 20% to 35%

In a 2017 study, eight experienced Icelandic school horses carried progressively increasing loads from 20% to 35% during repeated sections of tölt.

As load increased:

• Heart rate increased

• Blood lactate increased

• Breathing frequency increased

• Rectal temperature increased

• Strides became shorter and more frequent

• The horses spent a greater proportion of each stride with their feet on the ground

The average estimated aerobic threshold occurred at a load ratio of approximately 22.7%, but individual values ranged from 17% to 27.5%. (Cambridge University Press & Assessment)

That individual spread is one of the most useful findings. Even within the same breed, with similarly experienced horses completing the same test, there was no single threshold that fitted every horse.

Conditioned tour horses showing low physiological responses

A 2025 study assessed 16 Icelandic horses accustomed to carrying tourists. They carried incremental loads from 20% to 35% during short sections of tölt.

The overall physiological response was relatively low, and four horses did not reach the selected blood-lactate threshold even at 35%. Wider chests and certain aspects of uphill or straighter conformation were associated with greater measured capacity. (PubMed)

This does not mean ordinary horses should routinely carry 35%.

These were selected horses adapted to tour work, completing relatively short incremental stages. The study measured immediate physiological responses, not long-term back health, joint injury, soreness after repeated riding or welfare during several hours under the same maximum load.

We still cannot reliably calculate an individual limit

A separate 2025 study investigated whether a standard treadmill fitness test could predict how much weight an individual horse could carry during a ridden loading test.

It could not provide a reliable general method. The researchers concluded that there is still no standardised way to estimate an individual horse’s weight-carrying capacity. (PubMed)

That is the current scientific position in one sentence:

We can estimate risk, but we cannot calculate a precise universal safe limit from body weight alone.

My Practical Weight-Carrying Framework

This is a conservative clinical framework, not a validated regulatory scale.

Around 15% or less: generally lower concern

This is usually a comfortable screening range when the horse is:

• Mature

• Sound

• At a healthy body condition

• Properly conditioned for the work

• Well muscled through the back and hindquarters

• Wearing a saddle that fits both horse and rider

• Performing moderate work on suitable footing

A low percentage does not excuse poor saddle fit, lameness or an unbalanced rider.

Approximately 15% to 20%: assess the whole combination

This range may be reasonable for many healthy riding horses, but the percentage should be interpreted alongside:

• Work duration

• Speed

• Terrain

• Temperature

• Fitness

• Conformation

• Saddle fit

• Rider balance

• Previous back or limb problems

• Recovery after exercise

Approaching 20% should encourage more careful assessment, not automatic alarm.

Above 20%: increased caution

A ratio above 20% does not automatically mean the horse is being abused or will immediately be injured.

It does mean there is less room for error.

The horse should be appropriately built and conditioned, the saddle must fit the rider as well as the horse, and the work may need to be shorter, slower or less demanding. Close monitoring during the ride and over the following 24 to 48 hours becomes particularly important.

At or above 25%: do not assume experimental tolerance equals routine safety

Research horses have completed short tests at ratios of 25% to 35%, but those findings should not be converted into a routine target for recreational riding.

At these ratios, several studies have documented increased cardiovascular effort, altered stride mechanics, muscle soreness or adverse gait and behavioural responses. (ScienceDirect)

How Do You Calculate the Total Load?

Count everything the horse carries.

Total load

Rider + riding clothing + boots + helmet + saddle + saddle pad + bridle + breastplate + saddlebags + water + equipment

Load percentage

Total load ÷ horse’s healthy body weight × 100

Example

A horse has a healthy body weight of 500 kg.

The total load is:

• Rider in riding equipment: 82 kg

• Saddle and pad: 10 kg

• Bridle and additional equipment: 3 kg

Total load:

82 + 10 + 3 = 95 kg

Load percentage:

95 ÷ 500 × 100 = 19%

That combination falls below the traditional 20% guideline, but it still needs to be assessed for saddle fit, workload, soundness and recovery.

Example total-load ranges

Healthy horse weight	15% total load	20% total load
350 kg / 770 lb	52.5 kg / 116 lb	70 kg / 154 lb
400 kg / 880 lb	60 kg / 132 lb	80 kg / 176 lb
450 kg / 990 lb	67.5 kg / 149 lb	90 kg / 198 lb
500 kg / 1,100 lb	75 kg / 165 lb	100 kg / 220 lb
550 kg / 1,210 lb	82.5 kg / 182 lb	110 kg / 243 lb
600 kg / 1,320 lb	90 kg / 198 lb	120 kg / 264 lb

These figures are total loads, not maximum rider weights. Tack and equipment must be subtracted.

Should You Use the Horse’s Actual or Ideal Weight?

Use the horse’s healthy target weight, particularly when the horse is overweight.

An overweight horse may weigh more on the scale, but that extra body fat is already additional load the horse must move and thermoregulate. It does not create stronger bone, better topline or greater carrying capacity.

In a controlled crossover study, horses carrying 5% to 8% more body weight and fat had higher heart rates, lactate, respiratory rates and temperatures, slower recovery, poorer performance and greater locomotor asymmetry than the same horses in leaner condition. (Physiological Society Online)

For example, a horse weighs 500 kg but should ideally weigh 450 kg.

A 95 kg total load is:

• 19% of the horse’s current weight

• 21.1% of the horse’s healthier target weight

The second figure provides the more responsible assessment.

Putting weight on an overweight horse to improve the rider-to-horse percentage is the equine equivalent of fixing a warning light with electrical tape. The number looks better. The underlying problem does not.

What Factors Determine How Much a Horse Can Carry?

1. Soundness and pain

A horse with active lameness, back pain, sacroiliac pain, hoof pain or arthritis should not be assessed solely with a percentage calculation.

Even a relatively light load can worsen compensation or discomfort when the horse is already protecting part of its body.

Before increasing load, rule out:

• Forelimb or hindlimb lameness

• Hoof imbalance or pain

• Thoracolumbar pain

• Sacroiliac pain

• Hock or stifle disease

• Neck pain

• Neurological weakness

If the horse moves differently under saddle than in hand, ridden assessment may be required. Rider weight, saddle pressure and position can expose pain that is not obvious during an unridden trot-up. (DOI)

2. Fitness and muscle development

A well-conditioned horse can generally manage work more efficiently than an unfit horse of the same size.

What matters is not simply whether the horse looks large. Look at:

• Thoracolumbar muscle development

• Abdominal strength

• Hindquarter muscle

• Cardiovascular conditioning

• Ability to maintain rhythm and posture

• Recovery after exercise

• Familiarity with the required work

A horse conditioned for walking trails may not be conditioned for repeated jumping. An arena horse accustomed to 30-minute sessions may not be prepared for an all-day mountain ride.

Adaptation is specific to the work being performed.

3. Conformation

The 2008 light-horse study associated wider loins and greater cannon-bone circumference with less muscle soreness under heavier loads. More recent Icelandic-horse research found associations involving chest width and aspects of back and uphill conformation. (ScienceDirect)

However, none of these measurements currently allows an owner to calculate a precise safe load.

Potentially favourable characteristics may include:

• Adequate bone for the horse’s size

• A strong, well-muscled topline

• A relatively broad loin and chest

• Balanced overall conformation

• Healthy feet and limbs

• The ability to carry itself without hollowing or falling onto the forehand

Conformation must be interpreted together with soundness and conditioning.

4. Saddle fit for the horse

A well-fitted saddle spreads force over an appropriate area of the horse’s thoracic back.

A poorly fitted saddle may:

• Concentrate pressure behind the withers

• Bridge across the middle of the back

• Rock or slip

• Restrict shoulder movement

• Place excessive pressure under the cantle

• Produce painful focal pressure even at a lower load ratio

Research has demonstrated markedly different pressure patterns between well-fitting saddles and horses with clinical saddle soreness. (Beva Online Library)

A lightweight saddle is not automatically kinder if it fits badly.

5. Saddle fit for the rider

The saddle must also be large and balanced enough for the rider.

When the rider is too large for the saddle:

• The seat may extend onto or beyond the cantle

• Weight may become concentrated at the back of the saddle

• The rider may struggle to keep the shoulder, hip and heel aligned

• The horse may receive uneven or excessive local pressure

• The rider may become less stable

In the rider-size pilot study, the larger riders did not fit the available saddle seats appropriately, and the heaviest rider generated the highest peak pressure during canter. (Beva Online Library)

This is why simply placing a heavier rider on a larger horse without checking saddle compatibility may not solve the problem.

6. Rider balance and posture

The horse does not experience the rider as a perfectly still bag of sand.

The load moves during every stride. Rider vertical movement, lateral lean, timing and stability alter the forces transmitted through the saddle and limbs.

A 2025 gait study found that rider presence increased ground reaction forces and that lateral trunk lean was associated with additional changes in limb loading. (ScienceDirect)

A balanced rider can generally distribute load more predictably than a rider who repeatedly lands heavily, tips to one side or sits behind the horse’s movement.

However, skill does not make weight disappear. A balanced rider still needs an appropriately sized, sound and conditioned horse.

7. Work intensity and duration

The same horse-and-rider combination may be appropriate for one job and inappropriate for another.

More demanding situations include:

• Long rides

• Steep hills

• Deep sand

• Mud

• Unstable or rocky footing

• Fast work

• Repeated canter or gallop

• Jumping

• Carrying packed equipment

• Hot or humid weather

• Limited recovery time

• Consecutive working days

Most experimental loading studies involve short standardised tests. Their results cannot be assumed to apply to several hours of work or repeated daily use. The original 2008 researchers also recognised duration and speed as factors affecting carrying capacity. (ScienceDirect)

As duration, speed, gradient or heat increases, the sensible load should generally move downward.

8. Age and health

A mature, sound horse is not equivalent to:

• A young horse still developing strength and coordination

• A senior horse with arthritis

• A horse returning from injury

• A horse with muscle loss

• A horse recovering from illness

• A horse with respiratory or cardiac disease

• A horse with previous back pain

The number on the calculator may be acceptable while the individual horse is not.

Do Draft Horses Automatically Carry More?

A large horse can carry a greater absolute load at the same percentage.

For example:

• 20% of a 400 kg horse is 80 kg

• 20% of a 600 kg horse is 120 kg

That does not mean every draft horse can safely carry a higher percentage than a lighter breed.

Many draft breeds were developed primarily to pull loads, not necessarily to carry large loads on their backs. Back length, rib shape, withers, saddle availability, muscle development, soundness and conditioning remain important.

Likewise, a smaller Icelandic horse may be well adapted to carrying an adult rider, but the high ratios tolerated by selected, conditioned Icelandic study horses should not automatically be applied to every pony or small horse. The studies themselves found considerable individual variation. (Cambridge University Press & Assessment)

Breed labels are not permission slips.

Does Rider BMI Matter?

The horse is not carrying the rider’s BMI. It is carrying actual mass through a particular saddle and posture.

A rider’s height and dimensions may affect whether the saddle accommodates them and whether they can remain centred. Two riders with similar body weights may interact with the same saddle very differently.

In the six-horse pilot study, riders in two categories had similar BMI values but markedly different actual body weights and test outcomes. The researchers considered actual load, rider position and saddle fit more relevant than BMI alone. (DOI)

The assessment should focus on horse-and-rider compatibility, not appearance or personal judgement.

How Can You Tell if the Load Is Too Much?

Horses do not always stop or refuse when the workload becomes excessive.

Many compensate.

Signs during the ride

Watch for:

• Shortening of the stride

• Increasing time spent on the forehand

• Repeated stumbling or toe dragging

• Reluctance to move forward

• Difficulty maintaining canter

• Frequent breaking of gait

• Sudden crookedness

• Saddle slipping

• Tail swishing

• Ear pinning

• Head tossing

• Hollowing the back

• Repeated resistance during transitions

• Excessive sweating compared with the work

• Breathing or heart rate that seems excessive

• Loss of coordination

Increasing load has been associated with shorter strides, altered stance time, higher physiological effort and, in some studies, temporary lameness or pain-related behaviour. (Cambridge University Press & Assessment)

Signs immediately after the ride

Check for:

• Back tenderness

• Muscle tightness

• Heat or swelling

• Abnormal sweat or dry pressure areas

• Ruffled or displaced hair

• Reluctance to be touched or groomed

• Slow heart-rate or respiratory recovery

• Stiff movement after the saddle is removed

• Reduced appetite or unusual fatigue

Signs over the following 24 to 48 hours

Monitor for:

• Next-day stiffness

• Reduced willingness to move

• New lameness

• Sensitivity when saddled

• Behaviour change during mounting

• Reduced performance during the next session

• Persistent thoracolumbar soreness

• Muscle spasm

• Increasing saddle-related white hairs or skin injury

The horse looking comfortable at the end of the ride does not prove that the load was appropriate. Some soreness becomes more apparent the following day.

How Worried Should You Be?

Lower concern

The total load is around 15% or less, and the horse is:

• Sound

• Fit for the work

• At a healthy weight

• Appropriately muscled

• Comfortable in a correctly fitting saddle

• Recovering normally

• Showing no pain or gait changes

Continue routine monitoring.

Moderate concern

The total load approaches 20%, or the horse has one additional risk factor such as:

• Limited conditioning

• A longer-than-usual ride

• Hills or deep footing

• Hot weather

• A heavy saddle

• Previous back soreness

• Mild age-related stiffness

Reduce the workload, review saddle fit and monitor during the ride and for at least the following day.

High concern

The total load exceeds 20% and the horse also has:

• Poor conditioning

• Weak topline

• Obesity

• Current or previous lameness

• Back pain

• Poor saddle fit

• Demanding terrain

• Long-duration work

• Repeated stumbling or behavioural resistance

Stop treating the percentage as reassurance. Arrange a veterinary and saddle-fit assessment before continuing the same workload.

Critical concern

Stop riding immediately when the horse develops:

• Acute lameness

• Repeated loss of coordination

• Severe respiratory distress

• Collapse

• Inability or refusal to continue

• Marked weakness

• Severe back pain

• Signs of tying-up

• Dark urine

• Severe overheating

• A fall or suspected musculoskeletal injury

These signs require prompt veterinary advice.

When Is Excessive Loading an Emergency?

A rider-to-horse ratio by itself is not usually an emergency.

The horse’s clinical response may be.

Seek urgent veterinary assistance if the horse:

• Becomes non-weight-bearing

• Collapses or nearly collapses

• Is severely ataxic

• Develops persistent rapid or laboured breathing

• Remains dangerously hot despite active cooling

• Has rigid, painful muscles

• Passes dark brown or red urine after exercise

• Falls and may have injured its back, pelvis or limbs

• Develops severe pain during or immediately after work

• Cannot recover normally after exercise

Dismount safely, remove unnecessary tack, keep the horse quiet and follow your veterinarian’s instructions. Do not force an exhausted, lame or uncoordinated horse to keep walking simply to “loosen up.”

Could the Problem Be Something Other Than Rider Weight?

Yes.

When a horse becomes reluctant, short-strided or sore under saddle, possible causes include:

• Poor saddle fit

• Rider asymmetry or instability

• Hoof pain

• Osteoarthritis

• Tendon or ligament injury

• Thoracolumbar pain

• Sacroiliac disease

• Kissing-spine-related pain

• Hock or stifle disease

• Neck pain

• Neurological disease

• Poor conditioning

• Heat stress

• Respiratory disease

• Cardiac disease

• Anaemia

• Inadequate nutrition

• Excess body fat

The load may be contributing, but it may not be the only problem.

The mistake is changing riders or buying a larger horse without first assessing the horse that is already showing pain.

What Should You Do Right Now?

1. Establish the horse’s healthy weight

A livestock scale provides the best direct measurement where available.

A weight tape can be useful when a scale is unavailable, but use it consistently and allow a safety margin rather than treating an estimate as exact.

If the horse is overweight, use its healthy target weight for the calculation.

2. Weigh the rider accurately

Include:

• Normal riding clothes

• Boots

• Helmet

• Protective vest

• Any equipment carried on the rider

Do not rely on an old estimate.

3. Weigh the tack

Place the saddle, pad, bridle and other equipment on a suitable scale.

Do not guess based on saddle type. Two saddles that look similar may differ considerably.

4. Add all additional equipment

Include:

• Saddlebags

• Water

• Rain gear

• First-aid supplies

• Ropes

• Training equipment

• Pack contents

A few small items have a mysterious habit of becoming 10 kg once they gather in a saddlebag.

5. Calculate the percentage

Use:

Total load ÷ healthy horse weight × 100

Record the result rather than relying on memory.

6. Adjust for the workload

Move toward a lower ratio when the ride will involve:

• Greater speed

• Longer duration

• Hills

• Deep or unstable footing

• Heat or humidity

• Jumping

• A horse returning from rest

• Limited recovery between sessions

7. Check saddle fit for both horse and rider

The saddle should:

• Sit in the correct position

• Clear the spine

• Distribute pressure evenly

• Remain stable during movement

• Allow shoulder movement

• Accommodate the rider without forcing them onto the cantle

• Allow the rider to remain balanced

A qualified saddle fitter should observe the horse with the rider mounted and moving, not only inspect the saddle while the horse is standing.

8. Build the work gradually

Do not move immediately from light arena work to several hours of trail riding under the same load.

Increase one variable at a time:

• Duration

• Speed

• Gradient

• Technical difficulty

• Frequency

Monitor the horse during the ride, immediately afterwards and the next day.

9. Reassess when anything changes

Repeat the calculation and saddle assessment when:

• The horse gains or loses weight

• The horse loses topline muscle

• The rider’s weight changes

• The saddle changes

• The discipline changes

• The horse returns from injury

• The horse begins showing soreness or resistance

Common Weight-Carrying Mistakes

Treating 20% as a guarantee

Twenty per cent does not make an unsound, unfit or poorly saddled horse safe.

Forgetting tack and equipment

The rule applies to the total carried load, not only the rider’s body weight.

Using an obese horse’s scale weight

Extra fat increases the denominator while reducing fitness. Use a healthy target weight.

Assuming a taller horse is automatically stronger

Height alone does not describe bone, back strength, muscle, soundness or saddle suitability.

Assuming breed determines capacity

Conditioned Icelandic horses, Arabians, stock horses and draft crosses may have different strengths, but individual variation remains substantial.

Ignoring whether the saddle fits the rider

A saddle can fit the horse while being too small or badly balanced for the person sitting in it.

Judging only during the ride

Check the back, movement and behaviour later that day and again the following morning.

Blaming the rider before examining the horse

New resistance may reflect pain, lameness or poor saddle fit rather than rider weight alone.

How Can You Reduce the Risk of Overloading?

• Keep the horse at a healthy body condition

• Develop topline and hindquarter strength gradually

• Match the horse to the rider and intended discipline

• Use a saddle that fits both parties

• Weigh tack rather than guessing

• Improve rider stability and fitness

• Reduce load for hills, heat, speed and long duration

• Allow adequate recovery

• Monitor for back pain and subtle lameness

• Recheck the arrangement as the horse ages or changes shape

• Treat repeated stumbling, soreness or resistance as clinical information

The goal is not to find the heaviest load a horse can tolerate.

The goal is to choose a load under which the horse can work comfortably, recover normally and remain sound over time.

Frequently Asked Questions

Is 20% the maximum weight every horse can carry?

No. It is a commonly used screening guideline. Some horses may struggle below 20%, while selected conditioned horses may tolerate more during particular work. There is no scientifically validated universal maximum. (ScienceDirect)

Does the saddle count toward the 20%?

Yes. Count the rider, riding clothing, saddle, pad, bridle and all other equipment. Research weight ratios generally include tack within the total carried load. (MDPI)

Can a 500 kg horse carry a 100 kg rider?

A total load of 100 kg equals 20% of a 500 kg horse’s body weight. If the rider alone weighs 100 kg, the saddle and equipment will push the total above 20%. Whether the combination is appropriate also depends on the horse’s healthy target weight, soundness, fitness, conformation, saddle fit and workload.

Is a balanced heavier rider better than an unbalanced lighter rider?

Balance and posture can materially affect pressure distribution and gait, so rider stability matters. However, balance does not eliminate the effect of total load. Both weight and how it is distributed should be considered. (Beva Online Library)

What should I do when the total load is above 20%?

Do not panic or turn the discussion into personal criticism. Review the horse’s healthy weight, soundness, conditioning, saddle fit and intended workload. Options may include a more suitable horse-and-rider match, lighter tack, shorter or lower-intensity riding, improving rider balance, or using groundwork and driving as part of the horse’s activity plan.

Final Thoughts

The 20% rule remains useful because it gives riders, owners and riding schools a simple place to begin.

Its weakness is that it looks more precise than the science actually is.

A horse’s real carrying capacity depends on the complete combination: healthy body weight, bone and conformation, muscle development, fitness, soundness, workload, saddle fit, rider position and adaptation to the task.

Use 20% as a caution point, not a promise. Give yourself more margin for long, fast, hot, hilly or technically demanding work. Watch the horse during the session, check recovery afterwards and pay attention to stiffness or behavioural changes the next day.

The best horse-and-rider match is not the one that narrowly passes a calculation. It is the one in which the horse remains comfortable, balanced, willing and sound.

---

Use ASK A VET™ to record your horse’s healthy weight, total tack load, exercise duration, recovery and any changes in movement or back comfort. When the calculation is borderline or the horse is showing soreness, tailored veterinary assessment can help determine what needs to change.