03/03/2026
I’m going to wrap up this series with the 𝐂𝐎𝐗𝐎𝐅𝐄𝐌𝐎𝐑𝐀𝐋 𝐉𝐎𝐈𝐍𝐓 aka the 𝒉𝒊𝒑 𝒋𝒐𝒊𝒏𝒕.
The equine hip joint is located between the acetabulum of the pelvis (aka the hip) and the head of the femur.
The hip allows for flexion, extension, and limited rotation. This is all SUPER important for stride length, collection, as well as acceleration / deceleration.
𝐀𝐂𝐂𝐄𝐒𝐒𝐀𝐑𝐘 𝐋𝐈𝐆𝐀𝐌𝐄𝐍𝐓 𝐎𝐅 𝐓𝐇𝐄 𝐅𝐄𝐌𝐔𝐑
Unique to horses, we don’t have this😉
Restricts excessive abduction (away from the body)
Stabilizes the femoral head within the acetabulum
𝐋𝐈𝐆𝐀𝐌𝐄𝐍𝐓 𝐎𝐅 𝐓𝐇𝐄 𝐅𝐄𝐌𝐔𝐑
Stabilizes the femoral head to the acetabulum
Provides central joint stability
𝐆𝐋𝐔𝐓𝐄𝐔𝐒 𝐌𝐄𝐃𝐈𝐔𝐒
Largest propulsive muscle
Drives hip extension and power of the hind end
𝐌𝐈𝐃𝐃𝐋𝐄 𝐀𝐍𝐃 𝐃𝐄𝐄𝐏 𝐆𝐋𝐔𝐓𝐄𝐀𝐋𝐒
Assist in stabilization and controlled rotation
𝐁𝐈𝐂𝐄𝐏𝐒 𝐅𝐄𝐌𝐎𝐑𝐈𝐒
Extends the hip and brings the body forward
𝐒𝐄𝐌𝐈𝐓𝐄𝐍𝐃𝐈𝐎𝐒𝐔𝐒 & 𝐒𝐄𝐌𝐈𝐌𝐄𝐌𝐁𝐑𝐀𝐍𝐎𝐒𝐔𝐒
Major hip extensors contributing to engagement
𝐓𝐄𝐍𝐒𝐎𝐑 𝐅𝐀𝐒𝐂𝐈𝐀 𝐋𝐀𝐓𝐀𝐄
Assists in hip flexion
Stabilizes the lateral limb
𝐈𝐋𝐈𝐎𝐏𝐒𝐎𝐀𝐒
Primary hip flexor
Critical for protraction (the leg coming forward)
𝐆𝐋𝐔𝐄𝐀𝐋 𝐅𝐀𝐒𝐂𝐈𝐀 & 𝐅𝐀𝐒𝐂𝐈𝐀 𝐋𝐀𝐓𝐀𝐄
Integrate the hip musculature into the thoracolumbar and pelvis
The hip joint plays a huge role in hind end extension.
During the push off phase of stride, concentric contraction of the gluteals and hamstrings extends the femur caudally (backwards, behind the body), driving the body forward.
In collection, the hip must flex under load. This allows the horse to lower the pelvis and coil the hind limb beneath the body.
Here is a little snippet in where hind end engagement begins.
In turns and lateral work, the hip manages controlled rotation and stabilization.
Power originates in the hip, but must be coordinated with SI stability to be efficient.
Hip dysfunction in horses is often subtle and easily confused with SI, stifle, or lumbar pain…. It’s easy to get lost because of how interconnected the hind end is.
Common signs of possible hip dysfunction -
• Reduced stride length behind
• Difficulty bringing the limb forward (protraction restriction)
• Resistance to collection
• Loss of impulsion
• Cross firing
• Struggling to sit in a turn or stop
Seeing a trend here?
If the hip is strong and powerful but the SI cannot stabilize, we have an issue. If the SI is stable but the hip cannot generate extension, performance plateaus. It’s a cycle.
When both systems are balanced, the horse feels soft and strong… not heavy, strung out, or disconnected.
Because the hip joint is deep and heavily muscled, primary osteoarthritis is not as common than soft tissue strain or muscular imbalance. However, repetitive heavy work load, especially in young or poorly conditioned horses, can lead to joint inflammation, muscular strain, or compensatory overload patterns.
In young horses, the proximal femoral physis and pelvic growth centers remain open until about 5-6 years old. The acetabulum and femoral head must mature and ossify fully before they can tolerate repetitive torque.
Developmental timing matters.
Conditioning matters.
Symmetry matters.
When we zoom out, we can really see how interconnected the body is. One structure affects the next. The body is constantly working together.
If one piece falls behind, another compensates.
This is why understanding anatomy matters. And I understand it’s a lot and very overwhelming. And that’s okay. It’s allowed to be. It’s all about peeling back the layers to learn more. The more we learn, the better we can understand our horses.
It’s about how well the body coordinates as a balanced entity. 💜
#𝙐𝙣𝙡𝙤𝙘𝙠𝙂𝙧𝙚𝙖𝙩𝙣𝙚𝙨𝙨