The Mounting Block Test: Is Your Horse Flinching, or Is Their Saddle Pinching?
You lead your horse to the mounting block, take a deep breath, and as you lift your foot to the stirrup, it happens again. The pinned ears. The tense body. The quick sidestep away that pulls the reins through your hands.
For many riders, this moment is a frustrating battle of wills. It’s often labeled as ‘bad manners,’ ‘impatience,’ or a training issue that needs correcting. But what if it’s not a behavioral problem at all? What if your horse is trying to tell you something important about their comfort?
The simple act of mounting is one of the most revealing diagnostic tests you can perform. It’s a moment of intense, concentrated pressure that can expose underlying saddle fit problems that might otherwise go unnoticed. Your horse isn’t being difficult; they may be anticipating pain.
From ‘Bad Manners’ to a Cry for Help
For decades, the equestrian world has treated mounting issues as a discipline problem, but compelling research points to a different explanation. A landmark 2013 study led by Dr. Sue Dyson, a world-renowned expert in equine orthopedics, found a significant link between behaviors during saddling or mounting and underlying musculoskeletal pain. The conclusion was clear: horses exhibiting these behaviors were ‘significantly more likely to be lame.’
This shifts the entire conversation. The flinch, the pinned ears, the walk-off—these aren’t acts of defiance but often involuntary reactions to the memory or anticipation of discomfort. By viewing this moment as communication, we can start asking better questions. Instead of, ‘How do I stop my horse from moving?’ we should be asking, ‘What is causing my horse to move?’
The Biomechanics of Mounting: A Moment of Intense Pressure
To understand why mounting is such a revealing test, we need to look at what’s happening to your horse’s back. Even when using a mounting block, the process is inherently asymmetrical.
As you place your weight in the left stirrup and pull yourself up, you create a powerful downward and rotational force. Research from the Animal Frame (AniFra) initiative has shown this generates intense, localized pressure, primarily on the right side of your horse’s withers. A 2014 study in the Journal of Equine Veterinary Science confirmed that significant high-pressure points occur during the mount, even when a block is used.
Think of it like hoisting a heavy backpack onto one shoulder. For a brief moment, all the weight concentrates on one small area. If the strap is too thin or digs into a nerve, you’ll flinch. Your horse is doing the same thing, bracing against a force that twists the saddle tree and drives its panels into the sensitive muscles along their spine.
This repeated, focused pressure can lead to soreness, muscle atrophy, and a negative association with the entire act of being ridden.
How Your Saddle Can Cause Mounting Discomfort: 3 Common Culprits
When a horse anticipates this pressure, the reaction often comes down to the saddle’s design and fit. Here are three common ways a saddle can cause pain during the mount.
1. The Gullet Plate and Wither Area
The gullet plate—the rigid arch at the front of the saddle tree—is a primary offender. If its angle is too narrow for your horse’s shape, it will pinch the large trapezius muscle along the shoulder and withers. The twisting force of the mount can drive this metal plate directly into the muscle, causing immediate pain and restricting your horse’s shoulder freedom once you’re in motion. A horse that is constantly ‘girthy,’ sensitive to brushing around the withers, or reluctant to move forward may be experiencing this exact problem.
2. Panel Length and Pressure
Saddle panels are designed to distribute your weight evenly along the horse’s back. If they are too long for your horse’s frame, however, they can extend past the last rib and press into the sensitive lumbar region. This is a particularly common problem for compact or short-backed horses. As you mount, the twisting force can make the end of a long panel dig into the loin, causing the horse to dip its back or step away.
3. An Unstable or Bridging Tree
If the shape of the saddle tree doesn’t match the contour of your horse’s back, the saddle becomes unstable. A tree that is too straight for a curved back will ‘bridge,’ concentrating pressure at the front and back with a gap in the middle. Conversely, a tree that’s too curved for a straight back will rock. When you add the asymmetrical force of mounting, this instability is magnified, causing the saddle to shift, dig, and pinch unpredictably.
Turning the Mounting Block into Your Diagnostic Tool
Instead of dreading the mounting process, start observing it with a curious, diagnostic eye. Your horse is giving you valuable feedback. Here’s what to look for:
-
Ears: Are they soft and forward, or pinned flat against the neck?
-
Eyes: Is the eye soft and relaxed, or wide and showing white?
-
Muzzle: Is the mouth soft, or is it tight and wrinkled with tension?
-
Body: Does the horse stand quietly, or does it tense its back, hollow out, or shift its weight?
-
Reaction: Does it flinch when you place your hand or weight on the saddle? Step away, forward, or backward?
-
Breathing: Does it hold its breath as you prepare to mount?
If you see any of these signs, it’s time to investigate. The first step is a thorough saddle fit evaluation—one that looks not just at the static fit on a stationary horse, but at how the saddle interacts with the horse’s body in motion.
Frequently Asked Questions
My horse does this even when I mount from the ground. Doesn’t that make it behavioral?
Mounting from the ground drastically increases the asymmetrical force on your horse’s back, making any underlying saddle fit issue much worse. While a mounting block is always recommended, a reaction from the ground is an even stronger signal that the saddle may be pinching.
I always use a mounting block. Shouldn’t that prevent problems?
A mounting block is a fantastic tool that reduces strain on both you and your horse. It doesn’t, however, eliminate asymmetrical pressure entirely. It lessens the force, but if the saddle is already a poor fit, even that reduced force can be enough to cause discomfort.
Could it still be a training issue?
While behavior can be a factor, pain must always be ruled out first. A horse that has experienced pain from an ill-fitting saddle may develop a learned habit of avoiding the mounting block. But correcting the behavior without addressing the root cause—the pain—is unfair to the horse. Solve the comfort issue first, and the ‘behavioral’ problem often disappears with it.
Your Horse’s Comfort is a Conversation
The moments before a ride are as important as the ride itself. The mounting block isn’t a hurdle to overcome; it’s a checkpoint for communication. By listening to what your horse is telling you through body language, you transform from just a rider into a true partner.
A horse that stands quietly and willingly for mounting is not just well-behaved—it’s a horse that is comfortable, trusting, and ready to work with you. This partnership begins with ensuring the equipment you use is a tool for connection, not a source of pain.
