You’ve been told your horse is weak in his back. Or maybe that he needs more impulsion, more core, more hill work. You’ve done the hill work. You’ve done the poles. You’ve done the core-strengthening exercises from three different trainers, and he still feels like he’s falling apart at the seams.
Here’s the question nobody has asked you yet: is this actually weakness — or is it hypermobility?
Because those two things look almost identical from the saddle, and the training response to each one is completely different. If you’re treating a hypermobile horse like a weak horse, you’re not just wasting time. You’re making the problem worse.
What You’re Actually Feeling When You Ride Each One
The weak horse feels soft in a vague, unresponsive way. He doesn’t carry himself for long. His hindquarters trail. He falls on the forehand, loses rhythm under load, and fatigues visibly. But here’s the key: when he’s fresh and moving freely, he has moments of genuine organization. He can hold a shape — he just can’t sustain it.
The hypermobile horse feels loose in a way that’s hard to put your finger on. He might be brilliant on the lunge, flashy, scopey, light on his feet. But the moment there’s a rider, he seems to have trouble knowing where his body is. He falls in and out — not just when he’s tired, but consistently. He’s hard to half-halt because the energy leaks out somewhere before it reaches you. He might even feel weirdly comfortable to sit on, almost like riding a waterbed.
Both feel disorganized. Both feel like they can’t hold connection. The difference is in the pattern — and once you know what to look for, you can’t unsee it.
Four Under-Saddle Tests That Help You Sort It Out
These aren’t diagnostics that replace your vet or bodyworker. They’re observational tools that give you more information. Use them in combination.
1. The Straight Line Test
Pick up working trot on a straight centerline or quarter line. No bending, no lateral work — just ask your horse to track straight for 20 meters.
A weak horse will drift, but the drift will be inconsistent. Some passes he’ll drift left, some right, depending on fatigue and mood.
A hypermobile horse will drift with a pattern. He has a preferred collapse direction — usually into the shoulder on one side — and he’ll go there almost every time. The drift is directionally consistent because it’s structural, not effort-dependent.
2. The Shoulder-Fore Hold
Put your horse in a light shoulder-fore at trot and hold it for a 20-meter circle. You’re not asking for big angles — just a few degrees of alignment.
A weak horse will struggle to maintain it and gradually lose the shape as he tires, but he’ll respond fairly normally to corrections. Half-halt, reposition, he comes back.
A hypermobile horse feels like he can’t find the shape at all. He might overcorrect when you correct him — suddenly too much angle, then falling out the other way. He’s searching for an edge that isn’t there. His proprioception isn’t giving him clear feedback about where his limbs are, so your corrections don’t land cleanly.
3. The Downward Transition
Ask for a walk-trot-walk transition every 10 meters on a 20-meter circle. Watch what happens through his topline and hindquarters in the downward.
Weakness: The hindquarters drop or trail, but the horse catches himself and reorganizes within a stride or two.
Hypermobility: The whole body seems to accordion. You might feel his loin sink, his hindquarters go wide or close, and the transition takes several strides to resolve. It looks sloppy even when it’s slow and careful. And he may not repeat the same error twice — it’s just generally disorganized every time.
4. The Pole Grid Response
Set four ground poles on a straight line, 4.5 feet apart (for a trot grid). Let him trot through freely on a long rein first, then add a light contact and ask him to stay consistent.
A weak horse improves with repetition. By the third or fourth pass, he’s finding the rhythm and using his back better.
A hypermobile horse may actually get worse or more anxious with repetition. The poles demand precise footfall, and if his proprioceptive feedback is unreliable, repeated attempts feel increasingly chaotic to him. You might notice him rushing, getting tense in the neck, or losing the rhythm more, not less.
The Proprioception Piece Nobody Explains
This is the part that gets missed constantly, and it’s the whole reason treating hypermobility like weakness backfires.
A hypermobile horse has excessive range of motion in his joints. That sounds like a good thing — flexible, elastic, loose. But joints need to compress and sense position accurately to give the brain useful information. When the connective tissue is lax, those sensory signals are degraded. The horse genuinely doesn’t know where his foot is going to land until it lands.
He’s not being lazy. He’s not being resistant. He is operating with blurry internal GPS.
This is why more impulsion makes him worse. Asking him to push more actively through an unstable system is like asking someone to run faster on a sprained ankle. The energy just exits through the weakness.
I’ve covered the proprioceptive stability piece in more depth over on the podcast — if you want the longer conversation, start there.
What to Do Once You Know
Once you’ve identified hypermobility as the primary issue, the training shift is significant.
Stop chasing impulsion. Your goal is stability first, then energy. A quiet, slow, rhythmic trot that stays organized is worth ten times more than a forward, bouncy trot that falls apart.
Limit repetitions per session. Hypermobile horses fatigue differently. Their instability often compounds within a training session rather than improving. Shorter, more frequent work with clear rest intervals outperforms long sessions every time.
Use poles carefully. Ground poles are a valuable tool, but increase complexity slowly. Start with a single pole, get clean, then add. The grid test above tells you where his threshold is — work at the level where he succeeds, not where he struggles.
Introduce deliberate proprioceptive work. Cavaletti at varying heights, backing over poles, slow lateral work on uneven footing (cautiously), and spiral work at a controlled pace. These challenge his system without overwhelming it.
Build in asymmetry awareness. Hypermobile horses often have one side that compensates heavily for the laxity on the other. Don’t drill the harder direction — address it briefly, return to the easier side, then revisit. Grinding through the stiff or collapsed direction teaches bracing, not stability.
One More Thing Worth Saying Directly
These horses get labeled as difficult, lazy, or poorly trained all the time. They get pushed harder. They get stronger bits. They get more leg. And they get worse.
If your horse fits the pattern I’ve described — inconsistently organized, directionally predictable in his collapse, not improving the way a conditioning program should produce results — stop treating him like he needs more effort. He needs more precision.
That’s a different problem with a different solution. And getting clear on which one you’re dealing with is the first thing that has to happen.
If you’re ready to go deeper on hypermobility, stability training, and how to build a horse that can actually hold himself together under saddle, the book covers all of it in systematic detail. Join the waitlist and get early access at samanthabaer.com/free-lesson. It’s the framework I wish had existed when I was trying to figure this out the hard way.
