I'm new to the forum and really happy to get some good advise :) So my problem is that whenever I ride my heels don't go down as far as they should. I do calf stretches all the time and I stand on a step with only the balls of my feet and relax my weight into my heels. When I do this my heels go down just fine but as soon as a bend my knees, to mimic the way I would sit in the saddle, my heels come up and they look more flat footed.
A similar thing happens when I stand in my stirrups. When I stand, my heels go down but as soon as I sit, they come up. Is there anything else I can do?
So far this is the only thing that bugs my trainer about my form.
Side note: I do have pretty weak ankles so they get excruciatingly painful if I ride for a long time. Also I dislocated my left ankle two summers ago so that probably doesn't help either.