Going to pipe up meekly:
I have a young WB who is very caught up in his right shoulder following a suspensory injury. He’s basically laterally imbalanced and, as a result, “unsound”. I find that working him in leg yield and SI at the walk, at the start of any session, loosens up that shoulder and he comes sound (yes, he has been evaluated by vet and chiro, and this is just a case of working that shoulder to strengthen the muscle, he’s been cleared otherwise).
Because of his physical problems, I met resistance in the SI at first, and found that TOF was a nice way to “set him up” for it at the walk, and the 10m circle works wonders for getting the SI at the trot.
We’re now doing SI at trot on both reins, and he’s coming straighter and sounder by the day BUT I have to be really careful to make sure I sit straight. A crooked horse will make you want to sit crooked, and SI is one of those movements which makes me want to collapse my hip, so I think “tall” and watch the direction of travel, not the direction of bend.
The other thing I’ve noticed is that he goes better when I leave him alone in the SI. A gentle nudge of the outside leg to keep the impulsion occasionally, and just support from the inside leg. If I use too much inside leg, he is apt to want to drop the outside shoulder and move out, particularly when we do SI right (his weak side). My TB needs constant nudges from the inside leg to keep the bend (he can be a bit of a plank), whereas my husband’s TB just needed to be “put” into SI position and he would keep it til you asked him to straighten, so you need to work out how much application of the aids your horse needs from you. I’m presuming each horse is slightly different?
Ideayoda - I liked your post. Thanks.