Have her go through the same motions off the horse. There’s a book with great hip stretches called ‘Stretching’ (large soft cover). Routines for each type of sport. For riding, I put together his gymnastics, running and his riding stretches.
I still don’t know if she is, as others assumed, feeling faint due to pain, or just feeling faint, whether she does this under any other circumstances. I still don’t have enough questions resolved to really form any ideas about how this looks. it could very easily be some physical problem…but…
I once watched a lesson where a woman was asked to use an opening rein, to move her hand one inch off the horse’s neck. After a few rounds at the trot, in which the instructor kept saying, ‘come on, just try it, just a little bit’ she was sobbing uncontrollably. She tended to keep her hands in a very nice position, but her horse got stiff because the position was so unchanging. The instructor was just trying to ‘break it up’ a little bit, so the horse wasn’t so rigidly in one position, stiff, on the forehand…she was absolutely hysterical at the prospect of moving her hand even an inch inward.
People are often terrified of making a change, even a tiny change. It makes them feel insecure, off balance, in danger. Rather than just let go, let it happen, and give it a try, they can get extremely emotional. They literally are terrified. Often they aren’t even aware of it, but their body is aware of it. It’s almost an instinctive reaction.
People handle the motions of the horse by trying to dampen the motions of both their body and of the horse. They grip, they tighten up, they try to make themselves look ‘elegant’, but most of all they react to fear of motion, of being out of control, of unexpected motions of the horse. Most of them have no idea they’re even doing it. They aren’t even conscious of it.
If you take that away from them, if yiu try to break it up the slightest bit, they get desperate. Put her on the longe line on a very quiet, cushiony horse, and have her go around and do exercises, any exercises, to get her thinking instead of reacting. Loosen her up. Tell her jokes. Make her laugh. Gossip about someone. Give her some detail to concentrate on and harp on it like mad, like having her hold one arm out with the fingers down. Keep at her, keep having her focus on the fingers, and get her to hold them exactly in some position - doesn’t matter what as long as it’s not too clenched. Give her a complex series of motion - like hold the fingers a certain way, then she reaches down and slaps her thigh, then back to the fingers…give her a whole series of simon sayses… Keep her brain so focused on you and what you want her to do - demand it. Then have her open her hip, and yell, no no no, not too much, just for one second. Then have her stop, and go back to the fingers, thigh, whatever exercise.
We are our own worst enemies, LOL. As a friend of mine said, ‘A mind is a terrible thing’.