Your horse drifts left. He falls in on circles. He resists the right rein, won’t hold the canter lead, braces through his back on the diagonal. You’ve had the saddle fit checked. You’ve had his hocks injected. You’ve tried a new bit.
And nobody has looked at what your left hip is doing.
This isn’t a knock on anyone — it’s one of the most overlooked patterns in equestrian sport. When I’m watching riders at clinics, I’d estimate that somewhere around 80% of the horse problems I see can be traced, at least in part, back to one thing: the rider collapsing through the hip. Not tipping forward. Not gripping with the knee. Hip collapse — where one side of your torso shortens, your seat bone lifts, and your weight shifts unevenly without you ever realizing it’s happening.
It’s subtle. And it causes chaos.
What Hip Collapse Actually Is
Hip collapse isn’t a dramatic lean. You won’t see it in a photograph and immediately recognize it. It looks more like a slight crookedness, a barely noticeable shortening on one side of the waist, a whisper of unevenness in the seat.
Technically, what’s happening is this: the space between your lower rib and your iliac crest — your waist — shortens on one side. This causes your pelvis to tilt laterally, which lifts one seat bone out of the saddle and drives the other one down. Your horse feels the imbalanced weight distribution instantly. He doesn’t know it’s your waist. He just knows there’s more pressure on one side, and he responds accordingly.
He might fall in toward the heavier side. He might drift away from it. He might brace through his back to compensate, or speed up, or invert his neck. Different horses respond in different ways — but what they all have in common is that they’re responding to you, not misbehaving.
Why It’s So Hard to Feel
The reason this fault is so persistent is that it doesn’t feel wrong. In fact, for most riders, collapsing to the left feels like a straight left side, because they’ve been doing it for years. Their nervous system has normalized the pattern.
This is something I talk about a lot on The Elevated Equestrian podcast — the way our proprioception (our brain’s map of where our body is in space) can be genuinely inaccurate. What feels balanced is actually crooked. What feels like “sitting straight” is compensated. And because riding doesn’t give you a mirror at eye level for every ride, these patterns can go unchallenged for a long time.
The other reason it hides so well: we collapse on the same side almost universally. Most riders collapse to the left. This lines up with dominant right-handedness, with horses that are also stiffer to the right, and with the way most of us learned to ride — being taught to push more with the right leg on the right rein, which actually drives the right seat bone down and collapses the left waist further. We train the problem in without realizing it.
The Downstream Effects on Your Horse
Let me make this concrete, because the list of horse problems caused by this one fault is genuinely long.
Falling in on circles. When your inside seat bone is lifted — which happens when you collapse to the inside — you lose your ability to weight the inside hip and push the horse out. Your horse falls in because the aid isn’t there.
Counter-canter refusals and lead problems. A collapsed hip disrupts the timing of your canter aid. The seat bone that needs to follow the motion can’t do its job if it’s hovering. You get late aids, unclear aids, or the horse learning to ignore the aid entirely.
Back tension and resistance to the contact. An uneven seat creates uneven pressure through the saddle panels. Even with a perfectly fitted saddle, a rider who collapses left will load the left panel more. The horse braces through the left side of his back over time. Some of these horses get labeled as “difficult” or “crooked” without anyone checking the rider first.
Lateral stiffness that doesn’t resolve with bodywork. I’ve seen horses have regular massage, chiropractic, and acupuncture — and stay stiff to one side indefinitely — because the source of the tension was never addressed. The horse is getting sore in the same place every ride. Until the rider’s position changes, the horse’s body won’t change.
One-sided contact problems. If you collapse right, your right arm shortens with you. Your right rein becomes inconsistent and pulling. The horse learns to lean into the left rein to compensate. Now you have a rein contact problem that’s actually a waist problem.
How to Find It in Yourself
The most reliable diagnostic I know is video. Shoot yourself from directly behind — either at the halt or at the walk — and look at the horizontal line of your shoulder blades versus the horizontal line of your seat bones. They should both be level. If your left shoulder drops and your right hip drops, you’re collapsing left (the shoulder dips toward the side of collapse; the hip drops on the opposite side as the pelvis tilts).
The second test: stand on the ground in your riding position — soft knees, hips square — and put your hands on your waist. Can you feel that one side is longer than the other? Can you deliberately lengthen the short side by reaching your rib cage up and away from your hip on that side? If you can find it on the ground, you can start training the correction.
The fix is not “sit up straight.” That cue doesn’t address lateral collapse at all. The cue is: lengthen the short side. Find the waist on the collapsing side. Breathe into it. Grow tall through that rib cage specifically. The goal is symmetrical weight through both seat bones, and you get there by lifting the short side — not by pushing the long side down harder.
What to Actually Train
Once you can feel the collapse, you need exercises that reinforce the corrected pattern under load — because the nervous system needs repetition to build new proprioception.
- Posting trot without stirrups, with hands on hips. You’ll immediately feel where you’re collapsing on the rise. The collapsing side will pop the hand up. Train the long side of the posting so both hips rise evenly.
- Sitting trot on a circle with a ground pole. The ground pole gives your eye a reference point. Watch whether you’re drifting consistently to one side as you approach it. Use that information.
- Lateral exercises on the ground first. Teaching your body to lengthen one side while shortening the other — through something as simple as side-bending stretches before you ride — primes the pattern before you’re managing a horse.
- Eyes-closed work at the walk with a trusted ground person. Ask someone to call out “left” or “right” when they see the collapse. What you feel in the moment of the correction will start to recalibrate your proprioception.
The pattern took years to build. It won’t resolve in a week. But once you can feel it reliably, the improvement in your horse can be startlingly fast — because you’ve finally addressed the actual source.
The Bigger Point
Every time a rider tells me their horse is “crooked,” “drifts left,” “won’t go right,” or “braces on the flat,” I want to look at the rider first. Not because riders are always the problem — sometimes the horse genuinely has a soundness issue that needs attention. But because the rider’s body is the first variable we should rule out, and in my experience, it’s also the most commonly skipped.
Your horse is not broken. He’s responding to information. The question is whether that information is what you intended to give him.
Fix the hip, and you’ll be amazed how many problems quietly disappear.
If you want eyes on your position — and a concrete plan for building the symmetry your horse needs from you — I work with riders in clinics and private lessons at my base in Aiken. Come ride with me. Book through the contact page here.
