How I use a mirror in the indoor arena to fix my crooked shoulder
I have ridden past the same crooked feeling in my body for years. My right shoulder creeps forward on every left circle, and my left seat bone feels glued to the saddle while the right one lifts in protest. Archie, my eventer, knows it before I do. He bends his neck to the left but his shoulders drift right, his hindquarters swing out, and our dressage scores stay stubbornly average. For a long time I assumed it was a horse problem. It took a mirror on the long wall of my indoor arena at home to show me it was a rider problem, and a very obvious one at that.
Most riders I know in Australia have access to an indoor arena these days. The big centres at places like the Sydney International Equestrian Centre out at Horsley Park, or Boneo Park down on the Mornington Peninsula, have them built in. Smaller agistment properties often share a covered arena between a handful of spellers and competition horses, and a good chunk of riding clubs along the east coast have invested in one after a wet winter or two. Whatever the setup, a flat wall with good light is a training tool I used to ignore. Now I plan my week around it.
The mirror does not flatter me. It points out every slump, every elbow that wings out, every time I tip my head to the right because my hand has crept across the withers. After a few sessions in front of it, I started to see why my coach at our last event at Wallaby Hill kept telling me to ride the shoulders square and why nothing seemed to shift. I could feel the aids I was giving, but I could not see them. The mirror turned those aids into something I could watch in real time. I had a long yarn with her after the cross-country about whether to invest in one, and she reckoned it would change my season. She was right.
| Mirror setup | Best for | Cost in Australia | Where it works |
|---|---|---|---|
| Wall-mounted safety mirror (120cm x 240cm) | Daily schooling, dressage corrections | AUD $300–$600 | Permanent indoor arenas, riding clubs |
| Freestanding wheel-away mirror | Travelling coaches, pop-up clinics | AUD $900–$1,400 | Shared arenas, agistment centres |
| Full-length framed mirror | Limited budget, single-horse yards | AUD $150–$250 | Small private arenas, pony clubs |
| Acrylic shatterproof panel | Busy commercial centres, kids' lessons | AUD $500–$1,100 | HRIA-approved centres, Eventing NSW venues |
The table above is roughly what I worked through before settling on a wall-mounted unit in our home arena. Each setup has its merits, but the right one depends on how often you ride, who else uses the arena, and whether you need to wheel it out of the way for a jumping lesson or a clinic.
Why my shoulder falls in on every circle
The shoulder-in is meant to be one of the most corrective exercises we have in dressage. Bend the horse around your inside leg, ask the inside hind to step under, push the shoulders off the track by what feels like half a horse's width. Done well, it sorts out a thousand problems at once. Done with a collapsed rider, it sorts out nothing, because the rider brings the crookedness back into the horse on the next transition. I lived in that second camp for two whole seasons before I had the good sense to do something about it.
My coach, Meg, who flies down from Sydney for clinics at our place a few times a year, kept pointing at my right shoulder. I thought she meant the physical shoulder, the joint up by my collarbone. What she meant was the whole front of my torso, the way my chest rotated left and my right shoulder blade slid forward and down. On a left circle, that twist pulled my inside rein longer and my outside rein shorter. Archie felt the imbalance and answered by tipping his head and dropping his outside shoulder. We were a matched pair of bananas, and the judge at our last event was kind enough to underline it on the test sheet.
Once the mirror went up, I could see the twist before I felt it. The first time I asked Archie for shoulder-in along the long side, I watched my right shoulder slide a full hand's width past the midline. My chin drifted to the right. My outside elbow floated up. Everything I had been told in lessons was suddenly visible in a way no verbal cue had managed. The mirror held up a picture of what my body was actually doing, and it did not soften the edges.
Setting up the mirror so it actually helps
Not every mirror is the same. The cheap frameless panes you can pick up from a hardware shop near Castle Hill, or any Bunnings across the country for that matter, look tempting, but they shatter if a horse kicks the wall, and a spooked horse in a sand school is a real risk. I went with a proper equestrian safety mirror, the kind you can order through HRIA-approved suppliers or directly from the brands that service centres like Willinga Park. It is acrylic-backed, sits inside an aluminium frame, and bolts to the wall at about chest height when I am mounted.
Mounting height matters more than I expected. Too low and you watch your knees and stirrups. Too high and you see your helmet and not much else. I asked Archie to stand square while I drilled holes with a borrowed impact driver, then sat on him and checked the reflection from my normal working position. The top of the mirror sits roughly level with my chin, the bottom a hand's width above his shoulder. From the saddle I can see my hands, my elbows, my shoulders, and the line of my spine from waist to neck without craning around.
Lighting also changes what the mirror can do. Our arena has clear-span fibreglass roofing on the north side, which gives soft light most mornings, but on overcast afternoons the reflection goes murky. I keep a couple of LED strip lights along the long wall so I can ride at dusk without losing the image. Friends who ride at indoor centres around the Adelaide Hills have the opposite problem: too much glare through the western windows in the late arvo. A simple roll-down blind above the mirror solves it without breaking the budget.
My weekly mirror routine
Two days a week I plan my entire ride around the mirror wall. I warm Archie up on a twenty-metre circle away from it, then bring him down the long side where I can see myself. The first thing I check is my seat. Are my seat bones level? Is my pelvis sitting under me rather than tucked or tipped? Once I have settled there, I ride a few transitions, watch what my shoulders do, and let the image teach me what my body is doing wrong.
The most useful exercise for shoulder position has been a simple half-hall along the wall. I ask Archie to walk on a three-quarter line, then push his shoulders a step off the track with my inside leg. In the mirror I watch my inside shoulder stay back. When it drifts forward, I see it before he has time to react, and I correct with a slow exhale and a half-halt on the outside rein. Twenty metres later, my shoulder has reset. It is the same idea I use when I ride ground pole canter work with Archie — small, repeated, visible cues that build the muscle memory before the test.
I spend about fifteen minutes on shoulder-in and travers in front of the mirror, then move away from it and ride without any visual feedback. The point is not to stay glued to the wall. The mirror is a teacher, not a crutch. If I cannot reproduce the position on the opposite side of the arena, I have not really fixed anything. Some days I will ride back and forth past the mirror three or four times before I trust the feel enough to leave it alone.
From mirror image to body memory
After a month of this routine, something shifted. I caught myself walking Archie out to the paddock and noticing my own shoulders in the kitchen window. I would correct them automatically. That carry-over into everyday life is exactly what you want from any dressage exercise, and it confirmed for me that the mirror was doing more than showing me a reflection — it was rewiring the feel of straightness. Once your brain sees what correct looks like, it stops guessing what correct feels like.
The real test, though, came at our last outing. We competed at a horse trials at Albury in the Pre-Novice class. The warm-up arena was outdoors, dusty, no mirror in sight. I expected to lose the correction the moment I left home. Instead, I found that my body kept returning to the position I had drilled. When Archie started to fall in through a left circle in his prep, my inside shoulder did not slide forward. My outside rein stayed longer. The judge wrote a comment about the improved suppleness through the shoulder. I nearly cried in the secretary's tent while a kind volunteer handed me a cuppa.
Body memory is the long game. The mirror speeds it up by giving you instant visual feedback, but the goal is to ride without it. I treat my mirror sessions like a coach I see twice a week. Some rides I listen. Some rides I forget what I am supposed to be doing and have to be reminded. The difference is that the reminder is silent, on a wall, and never charges a clinic fee, which is honestly more than I can say for half the trainers I have worked with over the years.
Carrying the correction into competition warm-ups
Most competition warm-ups in Australia are open-air sand arenas. You will see mirrors at a handful of bigger venues — the indoor warm-up at the Melbourne Three Day Event, for instance, or the new covered arenas at a few of the major showgrounds — but the moment you leave home, you are on your own. I pack the mirror work into my preparation the week before an event. Two focused sessions, then a quiet hack on the day before travel so the corrections settle into a groove rather than feeling freshly drilled.
When we arrive at a venue, I run through a mental checklist at the mounting block. Where is my inside shoulder? Are my elbows soft? Is my chest square to the girth? I learned this checklist from watching myself in the mirror, and I find it more useful than any pre-ride stretch. Archie reads my posture before he feels my leg, so a tidy upper body gives him a tidy frame to step into. If I can keep my shoulders still through the warm-up trot, his first test trot tends to start in a much better place.
For riders who do not have a mirror at home, most riding clubs will let you book an indoor arena for a focused session, and a few of the bigger eventing centres now sell day passes for around twenty or thirty bucks. It is worth the entry fee just to spend an hour schooling in front of a wall you cannot lie to. After a few of those sessions you will start spotting your own crookedness everywhere you go, and that is the moment the whole thing begins to pay off.