We were at a Ray Hunt clinic once where he asked the riders to say “now” when the inside hind was coming forward. About half the riders did it correctly. I posted this on another thread about rotating hips:
This is one Susan Harris has us do whenever she is at our barn doing lessons. It’s a stalwart from Centered Riding and is one of the most enlightening exercises you can do.
Tack your horse up and mount up. Ignore the reins. Get another person. Close your eyes and have the other person lead you around. Keep doing it! For many laps, both directions, serpentines, whatever you can do comfortably. With and without stirrups. If you are a little out of whack on the corners your human friend can tell you a corner is coming. Add a little trot if that feels okay.
Focus on your hips and following the horse’s movement. Think about what direction your bones are moving: forward/backward, up/down, side to side. Concentrate on finding the circles your hip joints are making. What direction are they going, backwards maybe? On the diagonal? How large are they? Do they change? Think about what it would be like to pedal your bike backwards. Speed up a little and slow down a bit, ask for a longer stride, and be aware of how your body reacts to and receives the horse’s movement.
It is amazing how much more you will feel doing this than you do when you are “riding” your horse. It helps you loosen up and feel how your anatomy relates to the horse. As someone earlier noted, your body can’t necessarily point your toes in the optimal direction. But forcing your leg and your hips into an unnatural position can interfere with your horse’s movement, to say nothing of making you hurt. I try to remind myself to close my eyes on the long side for a few strides when I realize I am beginning to tighten up or grip or fail to receive the horse’s movement. What I like about this kind of exercise, and Centered Riding in general, is that it helps you synch your body with your horse’s and create images you can use to improve your position and your overall technique.