10/05/2026
The Equine Lower Back: Why It Matters for Performance — and How Poles and Jumping Influence It
The horse’s lower back plays a central role in movement.
Every stride requires the back to move, stabilize and transfer forces between the front and back of the horse. When we talk about a horse “using his back,” “lifting his back,” or becoming “stronger through the topline,” we’re really talking about the coordinated function of a much larger system.
The caudal thoracic spine, lumbar spine, lumbosacral junction, pelvis, abdominal muscles, deep spinal muscles and larger muscles surrounding the spine all work together with the limbs.
The horse needs enough stability to transmit force effectively and enough mobility to accommodate the movements of each stride.
An important part of understanding this is recognizing that different areas of the back move differently.
The lumbar vertebral region is relatively restricted in movement compared with some other parts of the spine. The lumbosacral junction, where the lumbar spine meets the sacrum and pelvis, allows considerably more flexion and extension.
That distinction matters enormously when we talk about the “lower back.”
The back is designed to move
Even during ordinary locomotion, the horse’s spine continually changes shape.
There are three principal types of movement through the thoracolumbar spine:
Flexion and extension — rounding and hollowing in the vertical plane.
Lateral bending — bending from side to side.
Axial rotation — rotation of the vertebrae around the long axis of the spine.
These movements occur in different amounts in different regions of the back. The caudal thoracic and lumbar regions are relatively restricted, while substantial dorsoventral movement occurs around the lumbosacral junction. Lateral bending and axial rotation are particularly associated with the mid-thoracic region.
The movements themselves can be surprisingly small. In one study of sound horses trotting, the measured flexion-extension range at the thoracic, thoracolumbar and lumbosacral angles was less than four degrees.
Those small movements still matter.
A healthy, functioning back makes small, controlled movements at the right time while remaining sufficiently stable to manage the forces generated by the limbs.
1. The lower back connects hindlimb power to the rest of the horse
The hindlimbs generate large forces during locomotion, and those forces have to travel through the pelvis and trunk.
Think about what happens when a hind foot is on the ground and the horse pushes himself forward.
The limb pushes against the ground, force travels through the hip and pelvis, and the trunk manages that force while the horse’s center of mass continues forward.
The horse’s core musculature helps control the trunk and provides a stable platform from which the limbs can work.
At the same time, the back continues to move.
This combination of movement and control is one of the most important concepts in understanding the horse’s back.
The muscles surrounding the spine continually regulate how much movement occurs, where it occurs and when it occurs.
2. The lumbosacral junction is particularly important
The lumbosacral junction is where the last lumbar vertebra meets the sacrum.
Because the sacrum forms part of the pelvis, movement here changes the relationship between the spine and pelvis.
Compared with the lumbar vertebrae themselves, this region allows substantial flexion and extension.
This becomes particularly important as the hindlimbs move forward underneath the horse and then backward during propulsion.
It helps to think of the lower back as several related regions:
a comparatively stable lumbar region + a much more mobile lumbosacral junction + a pelvis that continually changes orientation as the hindlimbs move.
Together, they form an extraordinarily important mechanical transition between the trunk and hindquarters.
3. Several layers of muscle control the spine
The large muscles we can see and feel along the horse’s back are an important part of the system.
One of the most significant is the longissimus, part of the large epaxial muscle system running along the spine.
Underneath these larger muscles are smaller muscles such as the multifidus.
Multifidus is particularly interesting because its fascicles span relatively short sections of the spine. This puts it in an excellent anatomical position to help control and stabilize individual vertebral motion segments.
Underneath the spine, the abdominal and sublumbar musculature also contribute to trunk control.
Back strength therefore depends on the coordination of multiple muscle systems surrounding the spine.
The larger muscles help produce and control movement, while deeper muscles contribute to the fine control and stabilization of the vertebral column.
4. The abdominal muscles are part of back function
The underside of the horse is an important part of the back-support system.
The abdominal muscles help control the position and movement of the spine and pelvis. At the same time, the epaxial muscles above the spine produce and control forces of their own.
These muscle groups can contract together to regulate the spine.
This is called co-contraction.
Think about stabilizing your own torso before lifting something. Multiple muscles around your trunk become active together, creating enough stability to control your spine while still allowing you to move.
The horse solves the same basic problem during locomotion.
Every stride requires the trunk to remain controlled while the limbs move and forces travel through the body.
This is why core stability is such a useful concept when we talk about conditioning the horse’s back. It includes the coordinated function of the muscles above, below and around the spine.
5. Why multifidus deserves special attention
Multifidus has become an important muscle in equine back rehabilitation because back pain can be associated with dysfunction and atrophy of the deep spinal musculature.
Muscle function may also take time to recover after the original painful problem has been treated.
This gives us an important distinction:
Pain treatment and functional rehabilitation are two different parts of recovery.
A horse may need appropriate exercise to restore muscular function after the painful structure itself has been treated.
Research into dynamic mobilization exercises — the familiar controlled “carrot stretches” involving flexion, extension and lateral bending — has found increases in multifidus cross-sectional area and improvements in left-right symmetry after repeated exercise.
Another study found increases in multifidus cross-sectional area after seven weeks of dynamic mobilization exercises.
This gives us a useful example of what rehabilitation can accomplish.
Dynamic mobilization exercises provide movement and sensory input while asking the horse to control the position of his spine. With repetition, that exercise can influence the musculature responsible for spinal control.
So where do poles come into this?
A pole changes the movement problem the horse has to solve.
During ordinary locomotion, the horse can use his familiar stride pattern. Add a pole and he has to adjust that pattern.
He has to organize:
* where the foot goes,
* how high the limb travels,
* when the foot leaves the ground,
* where it lands,
* and how the rest of his body remains balanced while all of that happens.
Pole work therefore combines a musculoskeletal challenge with a neuromotor challenge.
The muscles have to produce and control the movement, while the nervous system has to continually process information about the obstacle, the limbs and the position of the body.
6. Poles alter limb movement
When horses negotiate poles, they modify the trajectory of their limbs to clear them.
This can involve increased joint flexion and changes in limb range of motion, depending on pole height, spacing, gait and the individual horse.
Those changes in the limbs also affect the trunk.
Every change in where a limb travels, when it moves and where it lands changes the forces the trunk has to manage.
The trunk musculature has to respond.
This is one reason pole work can be useful for developing coordination, proprioception and postural control as well as increasing limb movement.
A recent review of equine back rehabilitation describes ground-pole and cavaletti work as higher-level neuromotor exercises that challenge balance and spinal stability.
7. Poles really do change spinal movement
We now have useful evidence demonstrating this.
A 2025 study examined 32 riding horses trotting in hand with no poles, over ground poles and over raised poles.
Trotting over poles increased total range of motion at multiple thoracic and lumbar locations compared with trotting without poles. Raised poles produced additional changes compared with ground poles.
There is an especially interesting detail in those results.
The researchers also found increased extension at several thoracolumbar locations.
So the value of pole work comes from the movement and control it asks the horse to produce, rather than from creating one particular spinal shape.
A useful exercise can ask different parts of the spine to move in different ways while the horse coordinates his limbs and maintains balance.
8. Pole spacing matters
The distance between poles changes the exercise.
A 2026 study examined horses walking over poles set at different percentages of their natural step length.
Changing the spacing altered both limb and spinal kinematics. Longer pole distances were associated with greater extension of the mid-back, while shorter distances reduced that effect.
Spacing therefore affects far more than whether the horse can comfortably reach the next pole.
So do:
* pole height,
* gait,
* speed,
* number of poles,
* approach,
* whether the horse is ridden or worked in hand,
* and the horse’s individual stride length and physical condition.
Thoughtful pole work takes these variables into account.
Changing any one of them changes the question we are asking the horse’s body to solve.
And then we get to jumping
A jump creates a much larger locomotor challenge.
The horse has to reorganize his body to move his own mass — and the rider’s, when ridden — over an obstacle and then safely manage the forces of landing.
The spine participates throughout the entire sequence.
9. The approach: organizing the body
Before take-off, the horse has to arrive at the fence with an appropriate distance, speed and balance.
During those final strides he is organizing limb placement, trunk position and momentum for take-off.
The hindlimbs need to be positioned so they can generate the forces required to redirect the body upward and forward.
At the same time, the trunk needs sufficient control to transmit those forces effectively.
This is where strength and coordination come together.
10. Take-off involves the back, pelvis and hindlimbs together
During take-off, the hindlimbs generate the forces that propel the horse over the fence.
Those forces travel through the pelvis and trunk as the entire body reorganizes for the jump.
The lumbosacral region changes angle as the pelvis and trunk move through take-off.
Studies of jumping horses have measured significant flexion-extension movement of the thoracic, thoracolumbar and lumbosacral regions during the jumping sequence.
The familiar bascule we see over a fence is therefore a whole-body movement involving the neck, spine, pelvis and limbs.
11. Over the fence: the horse reshapes his body
Once airborne, the horse has to organize his body to clear the obstacle.
The head and neck move, the forelimbs fold, the trunk changes orientation, and the hindlimbs leave the ground and reposition as the horse travels over the fence.
All of these movements alter the forces and moments acting on the spine.
Throughout the jump, the back is simultaneously:
moving, stabilizing, transmitting forces and responding to movements occurring at both ends of the body.
This is what makes spinal function so interesting.
Back strength is really the ability to control and coordinate all of these demands.
12. Landing requires strength and control
After the horse clears the fence, the body has to manage landing.
The forelimbs contact the ground first and absorb substantial forces while the trunk continues travelling forward.
The horse then reorganizes the trunk, brings the hindquarters through and returns to normal locomotion.
This creates a very different demand from take-off.
Jumping therefore requires both the ability to produce force and the ability to absorb and control it.
Muscles frequently work eccentrically — producing force while lengthening — to control movement and decelerate body segments.
Conditioning a jumper should prepare him for both sides of the equation: propelling the body over the fence and repeatedly managing the forces that occur when he comes back to the ground.
13. Why poles can help prepare a horse for jumping
This is where the connection between poles and jumping becomes particularly useful.
Pole exercises introduce some of the same basic movement challenges at a lower intensity.
The horse has to:
* judge foot placement,
* alter limb trajectory,
* coordinate consecutive strides,
* stabilize the trunk,
* respond to changing sensory information,
* and reorganize his balance.
Raised poles increase the challenge further.
This gives us the ability to progressively change the demands of an exercise:
ordinary locomotion → ground poles → raised poles/cavaletti → small jumping efforts → larger or more complex jumping exercises.
The appropriate progression will depend on the individual horse, his conditioning, his training and any existing physical limitations.
The important point is that the challenge can be graded.
14. The goal is controlled movement
More movement does not automatically create a better exercise.
The useful question is whether the horse can produce the movement with control.
A horse with poor trunk control, weakness, pain or an existing musculoskeletal problem may need a relatively small challenge initially.
As his ability improves, the exercise can become progressively more demanding.
Pole height, spacing and speed can all be adjusted to change the mechanical and neuromotor demands.
The exercise should match the horse.
15. A healthy back needs mobility AND stability
Mobility and stability work together.
Mobility allows the spine and pelvis to make the movements required for locomotion.
Stability allows the horse to control those movements and resist unwanted or excessive movement.
A functional athlete needs both.
The deep stabilizing muscles such as multifidus are particularly relevant because they help regulate vertebral movement.
Research linking multifidus development with improved postural stability reinforces an important idea:
spinal health is as much about control as it is about movement.
16. Why this matters beyond jumping horses
These principles apply to every horse.
A dressage horse transferring more load toward the hindquarters, an event horse galloping across uneven terrain, a trail horse stepping over logs and negotiating hills, and a pleasure horse carrying a rider all require coordinated interaction between the limbs, pelvis and trunk.
The exact demands differ.
The fundamental requirement remains the same:
the horse needs a trunk capable of controlling the spine while allowing the limbs to move and forces to pass through the body.
Conditioning the back therefore means developing the horse’s ability to move, stabilize, coordinate and transmit force.
That is where thoughtfully designed pole work can be so valuable.
A pole changes the movement problem the horse has to solve.
It can ask for greater awareness of foot placement, different limb trajectories, altered spinal movement, improved balance and increasingly sophisticated control of the trunk.
Jumping takes many of those same requirements and magnifies them.
Perhaps the most useful way to think about the horse’s lower back is as the center of a coordinated system connecting the hindquarters, forehand and limbs into one moving animal.
Every stride asks that system to balance movement with stability, mobility with control, and force production with force management.
And good conditioning helps the horse become better at answering those demands.
https://koperequine.com/how-paraspinal-muscles-and-fascia-maintain-equine-spine-health/
