03/26/2026
Muscles Do Much More Than Move Your Horse
Most people think muscles exist mainly to move the body.
But in your horse, muscles do far more than power movement. They help control breathing, circulate blood and lymph, move food through the digestive system, stabilize joints, protect organs, regulate body temperature, and even help your horse communicate.
Muscles make up about half of your horse’s body weight, and soft tissues, including fascia, nearly 80% of the body—a powerful reminder of how much they influence health, movement, and performance.
Here are some of the many important roles muscles play in your horse’s body.
1. Breathing
Muscles help your horse breathe.
The diaphragm, rib muscles, and abdominal muscles work together to draw air into the lungs and push it back out again. During exercise, these muscles work harder so your horse can get the oxygen it needs.
2. Circulation
Muscles help move blood through the body.
When muscles contract during movement, they squeeze nearby veins and help push blood back toward the heart. This helps keep circulation moving, especially in the legs.
3. Lymph Movement
Muscles also help move lymph fluid, which carries waste products away from tissues and supports the immune system.
Because the lymphatic system does not have a pump like the heart, muscle movement helps keep lymph circulating through the body.
4. Digestion
Muscles are involved in many parts of digestion.
They help your horse chew food, swallow, and move food through the digestive tract, allowing nutrients to be absorbed and waste to be eliminated.
5. Communication
Horses rely heavily on body language to communicate.
Muscles control ear movement, facial expressions, posture, and body position, all of which help horses express mood, attention, and intention.
6. Protection
Muscles help protect the body.
They cushion internal organs, absorb impact, and can tighten around injured areas to help prevent further damage.
7. Joint Stability
Muscles help stabilize and protect joints.
They control how joints move and help prevent excessive twisting, overextension, and strain.
8. Posture
Muscles help your horse stand and carry its body correctly.
Postural muscles maintain small amounts of tension that help support the skeleton and distribute weight efficiently.
9. Heat Production
When muscles work, they generate heat.
This helps your horse maintain body temperature, especially in cold conditions.
10. Sensory Awareness
Muscles contain receptors that send information to the brain about body position, tension, and movement.
This helps your horse maintain balance, coordination, and safe movement.
11. Movement
Movement is the function most people think of first.
Muscles contract and pull on bones to create the movements that allow your horse to walk, trot, gallop, turn, and jump.
The Big Idea
Muscles do far more than simply move your horse.
They support breathing, circulation, digestion, posture, joint stability, communication, and many other essential functions.
Healthy muscles play a major role in your horse’s comfort, performance, and long-term soundness.
https://koperequine.com/25-of-the-most-important-and-interesting-properties-of-equine-muscle/