I have a problem with having a very curved/stiff lower back while riding. I have no idea why. So today she had us trotting on a 20m circle and asking us to bend our horses joints and fan out their withers. I apparently had the bent part right, but not the opening up of the withers.
She had me ask for bend in his stifle and to bring his hind end forward, giving large and powerful steps forward. Make sure my elbows are in (another of my problems) but she described it as "scooping" with my tailbone.
How does one...scoop?
I kind of got the feel of it through trial and error and I will be working on figuring out how to pull this off in the next lesson but in the meantime does anyone have any advice or tips?