Understanding Equine Biomechanics, Where Do You Even Start?

If you spend enough time in the horse world online, you’ll eventually hear the word biomechanics everywhere.

“This horse has good biomechanics.”

“That exercise improves biomechanics.”

But despite how commonly the term is used, many horse owners are never really told what biomechanics actually means, or where to start learning about it.

The truth is that biomechanics is an incredibly broad and complex field. Entire careers are built around studying movement, anatomy, coordination, physics, locomotion, and performance.

This article is not going to turn you into a biomechanist overnight.

But it can help you start understanding movement in a more informed way, and perhaps even more importantly, help you start observing horses differently.

So, What Is Biomechanics?

Put very simply, biomechanics is the study of how living bodies move and respond to forces.

That includes:

• balance

• posture

• weight distribution

• coordination

• muscle function

• movement efficiency

• force production

• adaptation to movement and loading

  
  

In horses, biomechanics helps us understand how a horse moves, why movement changes, and what influences movement quality over time.

And contrary to what social media sometimes makes it seem like, equine biomechanics is not just about where the horse’s head is positioned, whether the nose is vertical, or whether a horse “looks pretty” in a frame.

Movement is far more complex than that.

Every step a horse takes is influenced by the interaction between:

• the skeleton

• muscles

• connective tissue

• the nervous system

• balance

• gravity

• momentum

• training history

• hoof balance

• rider influence

• comfort and discomfort

• coordination

• fatigue

• environment

  
  

Biomechanics is essentially trying to understand how all of these factors interact during movement.

Sources:Innocenti, 2018; Clayton & Hobbs, 2017

Why Horses Are Biomechanically So Interesting

Horses are fascinating from a biomechanical perspective because they are large moving animals carrying additional weight while balancing both themselves and a rider.

Unlike humans, horses naturally carry more weight on their forehand than their hindquarters. This already influences how forces travel through the body during movement, training, and riding.

Adding a rider changes this system even further.

Research has shown that the presence of a saddle and rider influences how the horse’s back moves and how forces are distributed throughout the body. Horses constantly adapt their movement patterns in response to loading, balance changes, coordination demands, training, and the environment around them.

An example of how rider balance and tension can influence the horse’s movement strategy. Here, the horse appears more organised onto the forehand rather than lifting through the trunk.

At the same time, riders are not passive passengers either. Riders influence movement through posture, timing, balance, tension, coordination, and the way they apply aids. Even small changes, like leaning slightly to one side, riding with tension through the hands, or losing balance during transitions, can influence how the horse distributes force through the body.

In good riding, horse and rider gradually learn to move together more harmoniously. In less balanced situations, both horse and rider may start compensating for each other.

This is one of the reasons movement is rarely as simple as:

“This muscle is tight” or

“This horse just needs to engage more.”

Movement is usually the result of many interacting factors.

Sources: Clayton & Hobbs, 2017; Clayton et al., 2023; De Cocq et al., 2004

You Cannot Understand Biomechanics Without Understanding Anatomy

Now before this scares anyone, no, you do not need to memorise every muscle in the horse’s body to start learning biomechanics.

But you do need a basic understanding of what structures are actually involved in movement.

The skeleton provides the framework of the body.

Joints create areas where movement can occur.

Muscles generate and control force.

Connective tissues such as fascia, tendons, and ligaments help transfer and manage forces throughout the body.

And the nervous system coordinates all of it.

One interesting thing about horses is that the front limbs are not attached to the skeleton through a collarbone like they are in humans. Instead, the forehand is suspended primarily through muscles and connective tissues, often referred to as the thoracic sling. This is one reason why posture, balance, muscle function, and movement coordination are so interconnected in horses.

One of the easiest mistakes people make when first learning about movement is looking at body parts in isolation.

For example:

• only focusing on the neck

• only focusing on the hindquarters

• only focusing on the topline

• only focusing on one limb

  
  

But horses do not move in isolated pieces. A horse that appears ‘stiff in the neck’ may actually be struggling with trunk stability, hindquarter engagement, balance, or coordination elsewhere in the body.

The body functions as an interconnected system.

Biomechanics is largely about understanding these relationships.

And honestly, this is also why learning biomechanics can initially feel overwhelming. The deeper you go, the more you realise how interconnected movement really is.

Sources: Clayton et al., 2023; De Cocq et al., 2004

The Body Is Constantly Adapting

One of the most important principles in biomechanics is that the body constantly adapts to the forces placed upon it. For instance, if a horse struggles to comfortably load one hind limb, it may subtly redistribute weight elsewhere long before obvious problems become visible. Riders influence movement through posture, timing, balance, tension, coordination, and the way they apply aids.

Horses are incredibly good at finding ways to continue functioning, even when movement becomes more difficult somewhere in the system.

This is where compensation patterns come in.

If one area cannot move efficiently, another area may start working harder to help maintain balance or forward movement.

Sometimes these changes are obvious. Sometimes they are extremely subtle.

This can show up as:

• changes in posture

• uneven muscle development

• difficulty bending one direction

• altered stride length

• changes in rhythm

• reduced stability

• changes under saddle

• tension during transitions

• shifting weight away from certain limbs

A horse may begin standing with one front leg consistently further forward, shift more weight onto one shoulder during turns, or hold the neck differently to help stabilise the body during movement.

Importantly, compensation does not automatically mean immediate injury or pain. Biological systems are constantly adapting.

But over time, certain movement strategies may place more stress on specific tissues or alter how efficiently the horse moves.

This is one reason why movement quality matters so much, especially in horses performing repetitive training or sport.

And it is also why observing patterns is often far more useful than obsessing over one isolated detail.

Sources: Clayton et al., 2023; De Cocq et al., 2004

So Where Should You Start Understanding Equine Biomechanics?

If you are interested in learning biomechanics, start simple.

Not by trying to memorise every anatomical structure overnight, but by learning to observe movement more carefully.

Watch horses:

• walking freely in the field

• moving on different surfaces

• carrying riders

• balancing during transitions

• turning

• compensating

• relaxing

• becoming tense

  
  

Start paying attention to:

A more organised moment in trot, with relative balance through the diagonal pair, a softer open frame, and less visible forehand loading. In movement analysis, small changes in posture, balance, coordination, and weight distribution can already tell us a great deal about how a horse is organising the body during locomotion.

• rhythm

• symmetry

• posture

• coordination

• movement variability

• balance

• breathing

• changes over time

  
  

Learn basic anatomy landmarks and their basic function first:

• the spine

• pelvis

• ribcage

• shoulder area

• major joints

• topline structures

  
  

And perhaps most importantly: accept that biomechanics is not something you “finish” learning.

It is an enormous field that combines anatomy, movement science, neurology, physics, training theory, tissue adaptation, force distribution, and much more.

The goal is not to become hypercritical of every horse you see.

The goal is to better understand movement, improve observation, and become more thoughtful about how horses use their bodies.

Because often, the more you learn about movement, the more you realise how much horses are communicating through it.

Sources

Clayton, H. M., & Hobbs, S. J. (2017). The role of biomechanical analysis of horse and rider in equitation science.

Clayton, H. M., MacKechnie-Guire, R., & Hobbs, S. J. (2023). Riders’ Effects on Horses—Biomechanical Principles with Examples from the Literature. Animals, 13(24), 3854. https://doi.org/10.3390/ani13243854

De Cocq, P., van Weeren, P. R., & Back, W. (2004). Effects of girth, saddle and weight on movements of the horse. Equine Veterinary Journal, 36(8), 758–763. https://doi.org/10.2746/0425164044848000

Innocenti, B. (2018). Biomechanics: a fundamental tool with a long history (and even longer future!). Muscles, Ligaments and Tendons Journal, 7(4), 491–492. https://doi.org/10.11138/mltj/2017.7.4.491

Toscano, M. J., & Friend, T. H. (2001). A note on the effects of forward and rear-facing orientations on movement of horses during transport. Applied Animal Behaviour Science, 73(4), 281–287.