For the past year or so, I rode a green horse that required excess attention. He had been trained very well in dressage but then his owner let him sit for a few years without anyone riding him so he lost a lot of his basic training. Another riding also let him get away once with bolting and he developed bad bolting and bucking problems from the experience. I myself was a green rider when I started on this horse and so we learned together how to ride. It wasn't long before I could ride him well without him bolting across the arena, however I could never let my mind wander while riding him. I now ride a very well, very behaved horse, and have discovered a few things over the past few months. That would be that my trainer was working to hard to get me help this horses pleasure that we overlooked my equitation! I have good hands and elbows, however I arch my back terribly. Does anyone have any suggestions on how to straighten my back without slouching? It gets a lot worse when I post. Also, My lower legs are pretty bad. I am doing some exercises to help them, but does anyone have suggestions for exercises I can do under saddle?