Cooling down your horse after exercise is one of the most important things you can do for their welfare. A horse that finishes a gallop, a jumping lesson, or a hack on a warm day is carrying significant heat — and a horse that doesn’t cool off properly risks heat stress, muscle damage, tying-up, and delayed recovery. Done well, cooling down takes 10–20 minutes and makes the difference between a horse that comes out tomorrow fit and fresh and one that stiffens up.
This guide covers how and why horses overheat, the proven techniques for cooling them down, what to do in hot weather versus cold, and how to spot heat stress before it becomes an emergency. The methods are simple and backed by recent FEI research from the Tokyo Olympics.
Table of Contents
Why Cooling Down Matters
During intense work, a horse’s core temperature can rise from a normal 37.5 °C to over 41 °C in 15–20 minutes. Horses generate three to ten times more metabolic heat per kilogram than humans, yet they have a smaller surface area relative to body mass through which to lose it. They rely almost entirely on sweat for cooling, and when ambient temperature and humidity rise, that system struggles.
An effective cool-down does four things:
- Drops core temperature back into the safe range before muscle damage occurs.
- Flushes lactic acid out of the muscles, reducing stiffness and the risk of tying-up.
- Returns heart rate and respiration to baseline so the cardiovascular system isn’t working against itself.
- Prevents muscle soreness and supports next-day recovery.
Skipping or shortening the cool-down is one of the most common training mistakes. It is also a reliable way to produce a stiff, dull horse in the days that follow.
How Horses Lose Heat
A horse has four routes to shed heat, in rough order of importance during exercise:
- Evaporation (sweat) — by far the most important mechanism, accounting for around 65% of heat loss during hot-weather exercise. Humid air reduces evaporation dramatically.
- Convection — air moving over the horse’s body. A breeze (or a walk into the wind) helps.
- Conduction — direct transfer to a cooler surface, chiefly through applying cold water to the coat.
- Radiation — heat radiating off the horse’s body into cooler surrounding air. Minor under exercise conditions.
Understanding this matters because it tells you what to prioritise. On a hot, humid day, sweat evaporates poorly — so conduction (cold water) becomes the fastest route to cool the horse. In cool, dry conditions, simple walking and a rug are often enough.
The Step-by-Step Cool-Down
After any session harder than a gentle hack, follow this sequence:
- Trot to walk for 2–3 minutes. Don’t pull up sharply from canter or gallop — bring the horse down gradually through the paces so the cardiovascular system can adjust.
- Walk actively for 10–15 minutes. Long, forward walk on a loose rein. This is the single most important part of the cool-down. It keeps blood flowing through the muscles, which flushes lactic acid and helps temperature drop.
- Loosen the girth a hole or two after the first few minutes of walking, but don’t remove the saddle until the horse has stopped blowing.
- Check respiration. Breathing should return to a normal pattern within 10 minutes. If it hasn’t, keep walking.
- Wash off sweat — apply water liberally to the neck, chest, back, belly and quarters. On a hot day, don’t scrape it off: let cold water and wind do the work (see below).
- Offer water. Small amounts every few minutes during the walk, or free access once the horse is breathing normally. The old “no water until cool” rule is outdated — modern research shows horses can drink freely during cool-down without risk of colic.
- Check feet and legs. Once the horse is calm and breathing normally, pick out hooves, check for heat, and apply cold hose therapy to legs if needed.
- Stable or turn out with a cooler or light rug if the air is cold. Never put a horse away hot.
The test: a horse is properly cooled when respiration is under 20 breaths/min, the skin under the saddle is cool to the touch, and the TPR values have returned to within normal resting range.
Cold Water Cooling: The Myth Busted
For decades, horse people were told that applying very cold water to a hot horse would cause muscle cramps, tying-up, or even shock. The research from the 1996 Atlanta and 2020 Tokyo Olympics, published by the FEI, proves otherwise.
Cold water is the fastest, safest way to cool an overheated horse. The 2020 Tokyo heat-mitigation protocol is now the global standard:
- Apply cold water (ideally below 10 °C) all over the body, including the large muscle groups of the hindquarters.
- Do not scrape the water off — scraping removes the coolest water just as it starts to work. Leaving it in place allows conduction to continue.
- Keep the horse walking while cooling. Movement speeds heat loss.
- Reapply every 30 seconds on the hottest days — the water warms quickly against a 41 °C body.
The “ice water causes tying-up” myth is one of the most damaging pieces of folk wisdom in horse care. Tying-up is caused by lactic acid build-up and metabolic disturbance, not by cold water on the skin. If a horse is overheating, cool it aggressively.
Cooling Down in Hot Weather
UK summers are getting warmer, and even a 24 °C day can stress a horse if there’s high humidity and no breeze. Use this checklist when the heat index (temperature + humidity) is high:
- Schedule work for early morning or evening — avoid the 11:00–15:00 peak.
- Shorten sessions and insert walk breaks every 10 minutes.
- Have buckets of cold water ready ringside or at the trailer before you start.
- Apply water continuously — wet the horse down before mounting, during breaks, and throughout the cool-down.
- Use ice boots or cold-hose legs to support muscle recovery.
- Offer electrolytes in water or on feed. A sweating horse can lose 10–15 litres in an hour, along with significant sodium, chloride and potassium — see our guide to dehydration in horses.
- Skip work entirely on days where the heat index (using the FEI formula: 2 × temperature in °C + relative humidity %) exceeds 150.
UK competitions increasingly follow BEF and FEI heat-abatement protocols — expect to see cooling areas with misting fans and ice baths at major events.
Cooling Down in Cold Weather
Cool-downs matter just as much in winter, but the priorities flip. On a cold, wet day a sweaty horse can become chilled within minutes of finishing work, which causes muscle tightness and compromises the immune system.
- Walk until breathing is normal before removing the saddle.
- Use a sweat rug or cooler rug — these wick moisture away from the coat while keeping the body warm. A fleece or honeycomb cooler is ideal.
- Don’t wash a cold horse with cold water — towel-dry visible sweat or sponge only the girth and saddle area with warm water.
- Leave the rug on until the coat underneath is completely dry. Check after 20 minutes and again at 40.
- If the horse has been clipped, put a cooler on immediately after dismounting.
For horses that are routinely worked in winter, a clipped coat and correct rugging actually help — a full winter coat traps sweat and takes far longer to dry.
Signs of Heat Stress
Heat stress moves along a continuum. Catch it early and the horse recovers with cooling and rest; miss it and you’re dealing with a veterinary emergency.
| Stage | Signs | Action |
|---|---|---|
| Mild | Heavier breathing than expected, patchy sweat, slightly dull response | Stop work. Walk, cool with water, offer drink. |
| Moderate | Rapid breathing (>40/min), heart rate >60 bpm at rest, heavy sweat, reluctance to move | Aggressive cold-water cooling, walk, phone vet. |
| Severe | Temperature >41 °C, “inverted” pulse/respiration (respiration > pulse), little or no sweat, unsteady, dull, colicky signs | Emergency. Continuous cold water, call vet immediately. |
The anhidrotic horse — one that has lost the ability to sweat, seen occasionally in hot humid climates — is at particular risk. If a horse in heavy work isn’t sweating, treat it as a serious concern and investigate.
After Competition and Travel
Competition horses face a double burden: hard work followed (often) by a long box journey home. A proper cool-down before loading is essential.
- Cool down fully before putting the horse on the lorry. Travelling a hot horse is a recipe for dehydration and colic.
- Offer water and a small haynet on the lorry, not hard feed.
- Strip leg bandages or travel boots for the first 30 minutes if the horse is very warm, so legs can breathe.
- On arrival home, unload, walk for 10 minutes, offer water, check all four legs for heat or filling, and turn out in a familiar paddock if possible.
Endurance and eventing horses benefit from targeted cooling on the large muscle groups of the neck, shoulder and quarters where the biggest vessels carry blood closest to the surface.
Common Mistakes to Avoid
- Putting a hot horse straight back in the stable. A still, hot horse in a stable stops sweating and can’t shed heat. Walk first, always.
- Scraping water off immediately. This removes the cooling layer just as it’s doing its job. Let it stay in place, walk, and reapply.
- Offering a full bucket, then removing it. Give small, regular drinks — the horse will self-regulate.
- Rugging a wet horse with a thick day rug. Traps heat and moisture. Use a cooler.
- Assuming the horse is cool because you are. You have a 37 °C body temperature and a huge capacity to cool by sweat. The horse has a 41 °C body temperature, carries you plus tack, and works harder per kilo.
- Skipping the walk because the arena is closed. Walk on the road, in a lane, or in the yard — do not skip it.
Frequently Asked Questions
How long should I cool down my horse after a ride?
Aim for at least 10 minutes of active walk after any schooling session, jumping lesson or hack harder than a slow walk. After fast work (galloping, eventing, hunting) or on a hot day, extend the walk to 15–20 minutes and follow with cold-water cooling until breathing and temperature have normalised.
Can I hose my horse with cold water after exercise?
Yes — cold water is the fastest way to cool an overheated horse. Research from the Atlanta and Tokyo Olympics confirms that ice-cold water applied liberally (and not scraped off) safely reduces core temperature with no increased risk of tying-up or muscle cramps. The old “cold water is dangerous” rule is a myth.
Should I scrape water off my horse?
On a hot day, do not scrape. Leave the water in place and let evaporation continue to cool the horse. Scraping removes the cooled water just as it’s starting to work. On a cold day, scrape excess water off and put a cooler on to prevent the horse from becoming chilled.
Can I let my horse drink while cooling down?
Yes. Current research shows horses can drink freely during and after exercise without increased risk of colic. Offer small amounts every few minutes during the walk, or allow free access once breathing is normal. The old rule of “no water for an hour” is outdated.
What’s the best rug to use after exercise?
A cooler rug (fleece or honeycomb mesh) wicks sweat away from the coat while preventing chilling. It should stay on until the coat underneath is fully dry — usually 30–60 minutes. Never put a thick stable or day rug on a sweaty horse.
How do I know my horse is properly cooled down?
Check three things: respiration under 20 breaths per minute, skin under the saddle area cool to the touch, and the horse standing calmly on a loose rein. For a detailed check, take full TPR — temperature, pulse and respiration should all be back within the normal resting range before the horse is stabled or loaded.
