Good questions!
Amastrike- A clip would be better. If your rehab professional is inexperienced when it comes to the specifics of your sport, PM me as I have a few ideas to throw around.
To be sure it is not the riding per se that is the problem, it is the what if first, the mechanics second. Grafts always stretch out, question is all the other X factors of riding…horse width, gait, discipline, etc…That combined with the huge lack of knowledge about the sport and how it affects graft life is why your physician and rehab professional are moving slowly.
SonnysMom-
When the heel is down below parallel, a bunch of factors kick in which put the lower extremity from hip to foot in a more vulnerable position when it comes to injury. Mot importantly is the loss of calf function. The calf, after ACL surgery becomes an important dynamic stabilizer of the tibia. That function is decreased by the act of either relaxing the calf and letting the heel sink or actively pulling the toes up.
You could be an exception- Check though a few head on or from behind pictures of you riding. Is the ankle on the surgical side “collapsed” where it look like the foot is turned up/out.
In standing bare foot, does your foot flatten, knee roll in or hip jut out to the side? Can you perform the same number of single leg heel raises on the right and left side in a straight and bent knee position?
You can check my website for a little clip I did on the topic
Regards,
Medical Mike
equestrian medical researcher
www.equicision.com