If you’ve tried everything the internet recommends for building a topline — long and low, hill work, poles, cavaletti, stretchy trot — and your horse still looks like a banana with legs, there’s a good chance you’re working against your horse’s actual problem instead of with it.
The hypermobile horse doesn’t lack topline because he hasn’t been worked enough. He lacks topline because he cannot organize his body well enough to use the muscles you’re trying to build. Frame him up and he braces. Let him go long and low and he collapses. Ask for engagement and he swings through without ever actually loading. The musculature you want sits unused — not because the horse is weak in the traditional sense, but because the neurological signal that says stabilize here never fires reliably.
This isn’t a fitness problem. It’s a coordination problem. And the fix requires a fundamentally different approach.
What’s Actually Going On in the Hypermobile Body
Hypermobility — the excess joint range of motion that makes some horses look naturally supple and elastic — comes with a less-discussed downside: the passive stabilizing structures (ligaments, joint capsules, connective tissue) are doing less of their job than they should. That pushes load onto active structures, primarily the muscles. But here’s the catch: a horse that has never been required to actively stabilize will often choose the path of least resistance through movement instead of recruiting the deep stabilizing muscles to brace the joint.
What this looks like in practice: the horse moves through the back beautifully in a loose walk but the moment you ask for any engagement, he either braces through the topline or swings so freely that nothing loads. His longissimus runs along both sides of his spine looking flat and underdeveloped despite years of what looks like correct work. His hindquarters have muscle, but it’s the wrong kind — compensatory bulk in the glutes and gaskin from hauling himself around rather than pushing through a stabilized lumbosacral joint.
You cannot build the right muscle on a body that’s patterned around compensation. You have to interrupt that pattern first.
Why the Standard Topline Advice Fails These Horses
Long and low works well on a horse whose nervous system can organize itself in a lengthened position. Many hypermobile horses cannot. When you drop the frame and push them forward, they fall onto the forehand, collapse through the poll, and drag themselves along in a way that actually reinforces the compensatory pattern you’re trying to break. The neck gets tight, the back swings but doesn’t load, and after six months of “stretchy trot” the topline still looks hollow.
Hill work has similar issues. Going uphill requires the horse to engage the hindquarters — but if the lumbosacral joint isn’t stable, the horse will rock forward over the withers and use the front end to pull himself up the grade. You’re strengthening the wrong thing, and you’re doing it on a gradient that magnifies every coordination error.
Poles and cavaletti can work, but only if the horse is already organized enough to step through them with intention. A disorganized hypermobile horse will just tighten his topline to clear the poles and call it done.
The common thread: all of these tools assume the horse knows how to engage. The hypermobile horse often doesn’t — not because he’s lazy or unrideable, but because no one has ever asked him to find stability before asking for movement.
The Actual Starting Point: Stability Before Swing
Before you can build a topline on a hypermobile horse, you have to teach the body what stabilization feels like. This sounds abstract but it’s extremely concrete in practice.
Neutral spine in the halt and walk. Start here. A hypermobile horse asked to stand square will often be standing square in the feet while hanging through the topline — the back is dropped, the belly is low, and there’s no tone anywhere through the core or lumbar region. Your job in the early phases of this work is to create moments where the horse finds a neutral, engaged spine in stillness. This is a groundwork and in-hand task as much as it’s a ridden one.
Short, loaded transitions. Not transitions across a long diagonal or down a long side. Walk-halt, walk-halt, walk-halt. Three steps, halt, three steps, halt. You’re asking the hindquarters to absorb weight at the moment of transition rather than just stop forward motion. Most hypermobile horses will try to fall into the halt rather than step into it — you’ll see the head come up, the back hollow briefly, and then they’re stopped. That’s the pattern you’re interrupting. The goal is a halt where the back stays neutral, the hindquarters lower fractionally, and the horse breathes.
Shoulder-in before anything else lateral. Shoulder-in is your most powerful early topline builder because it asks the inside hind to step under and load while keeping the horse slightly bent away from the direction of travel. This creates a moment of lateral loading through the lumbar region that nothing else replicates cleanly. But it only works if the horse is upright in the cervical vertebrae and isn’t hanging on the inside rein. Hypermobile horses love to collapse to the inside — it feels like bend, it looks like bend, and it does nothing useful.
If your horse braces and leans on the inside shoulder the moment you try to organize him for lateral work, that’s a specific problem worth addressing from the beginning of every ride. The warmup sequence that addresses exactly this — neutral spine walk and trot work, shoulder-in, leg yield, and transitions to loosen a horse that braces and leans on the inside shoulder — is the subject of the “Unlocking the Back of a Stiff Horse” ride-along, a 16-minute audio lesson you can play from your phone while you’re actually on the horse.
Building Topline Once Stability Is Online
Once you have a horse that can find a neutral spine in the halt, walk a few steps in genuine self-carriage, and accept lateral loading in shoulder-in without collapsing to the inside, you have a horse whose body is ready to build muscle correctly.
Long and low now works — but it looks different. The stretched trot you’re asking for has forward momentum and a long neck, but the back is up, not down. There’s tone through the topline even in the stretch. The horse is reaching into the contact rather than falling onto the forehand. This is the moment where stretchy trot actually builds the longissimus and the muscles along the thoracic and lumbar spine.
Hill work now works too. With stabilization patterns established, the horse can use the grade as load rather than leaning into it. Two to three minutes of trot uphill on a moderate grade, once the coordination is there, builds more topline in a month than six months of flatwork on a disorganized horse.
Add poles only after you see the back lift consistently in trot work. When the back is up without poles, poles will reinforce and deepen that pattern. Before that, they’re just obstacles.
What to Watch for as Progress Indicators
Progress in a hypermobile horse building topline doesn’t always look like what you expect. You may not see visible muscle change for eight to twelve weeks. What you’ll see first is behavioral: the horse is quieter in the halt, the transitions become more even, the walk on a loose rein has more swing without the backing off. These are neurological changes preceding muscular ones, and they matter.
Second, you’ll feel a change in the quality of the contact. The horse who was either leaning or disappearing from the rein will start to offer a more consistent, elastic weight in your hand. That’s the horse beginning to carry himself — the prerequisite for carrying you.
Third — and this is often the last thing owners notice because it’s subtle — the flanks will start to look different. A horse building true abdominal tone shows it in the flank first. The belly lifts. The loin fills in from underneath. The topline itself is often the last place you see the change.
A Note on Support During the Building Phase
If your horse is in this active rebuilding phase, his body is doing a lot of work even in sessions that feel light. Therapeutic support — particularly through the back and lower legs — can make a real difference in how he presents the next morning and how quickly he warms up for the next session. If you’re interested in what a post-work recovery routine looks like for this type of horse, I have gear reviews on the blog covering the therapeutic wraps and pads that I use with in-work sport horses.
The Bottom Line
Building a topline on a hypermobile horse is not about more work, harder work, or fancier exercises. It’s about sequencing the work correctly — stability first, then swing, then load. Skip the first step and you’ll spend years wondering why your horse looks exactly the same despite everything you’ve tried.
If you want to practice this kind of work in real time, the ride-along library is where I put the audio lessons you can play while you ride — structured sessions you can follow from your phone without stopping to look at your phone. It’s the most efficient way I’ve found to bridge the gap between reading about a concept and actually feeling it from the saddle.
Start with the halt. Stay there longer than feels productive. The topline you’re looking for is built on the moments of stillness you’re probably rushing through right now.
