21/09/2025
RIBS
โMy horse is stiff and cannot bend around my legโ
This is one of the most common statements I hear.
When it comes to recognising dysfunction and pointing out the problematic areas in the horse's body, the ribcage is often overlooked.
Equine ribs attach at two main locations: the thoracic vertebrae and the sternum. True ribs (first eight pairs) attach directly to the sternum via cartilage, while false ribs (the next 10 pairs) attach indirectly by forming a costal arch. Each rib has a head and a tubercle that articulate with the thoracic vertebrae.
We talk about the thoracic sling, about the pelvis and the back, but the ribs are hardly ever mentioned. But we shouldn't forget that the ribs are directly attached to the spine itself. We shouldn't forget that the diaphragm (which attaches to the ribs) shares an attachment to the psoas muscle, influencing the hind end. And we shouldn't forget that the first few ribs are very, very closely connected to the base of the neck and the thoracic sling. So, if we want the body to function well, the ribcage needs to function well too.
The function of the ribcage is to protect the sensitive inner organs, and even though it might seem like a structure with little to no biomechanical implications, it does actually need to be able to move. As the horse breathes, the ribcage expands and contracts. As the horse bends his spine, the ribcage needs to bend with it, otherwise bending is impossible.
Rib movement plays an important biomechanical part in the horse's ability to bend through the body. The movement of the ribs gives us riders the feeling of the horse bending around our inside leg. When riding a circle the ribs come closer together on the inside of the bend and wider apart on the outside, and the whole barrel of ribs swings more to the outside.
There are many reasons why we see a limited range of motion in the horse's ribcage, including breathing problems, pelvic dysfunction, rib fractures, poor saddle fit and chronic stress... If your horse has ever had a psoas issue, chances are, the diaphragm will have problems too. And if the diaphragm is tight, the range of motion of the ribcage will be limited. A similar thing can be said if your horse has ever had a back issue. Whatever the problem is, the ribcage is to be addressed too.