Not too long ago, I heard Chemaine Hurtado, owner and trainer at Symphony Dressage Stables, use the phrase, the centaur effect.
Holy smokes, was that ever a powerful image. I am definitely going to be asking her to elaborate, but since hearing those words, my seat has been way more plugged in than ever before. While the image is helpful when I ride Speedy, it's been much more powerful with Izzy.
Izzy's back is much tighter than is Speedy's, so it can be difficult to access what sometimes feels like a board. When I find it difficult to sit "in" Izzy's back, I immediately recall the idea of a centaur, and instantly my pelvis softens and feels as though it's melting into his back; the centaur effect.
It's funny how powerful some images can be. Sometimes an image works, and sometimes not so much. The centaur effect was a great one for me. Now let's see if I can actually apply it.