Unfortunately, when I go back to the posting trot it feels like that hard work is going out the window. I have a tough time posting and keeping my leg back and heel down, which means that I end up having to move it back when I feel him about try and slow down on me just to keep it in the proper position. It's my chair seat coming back to haunt me at the posting trot.
Any suggestions on how to fix this? Posting trot without stirrups? Other exercises?