First you have to let everything heal.
Then you have to recognize that there is no way that you can ride like you used to, hopefully this is temporary.
Then you will have to regain all the muscles that wither away while you heal.
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The first time I uttered the words “Help I can’t get off” I was on an 18.2 hand high horse. Nowadays, since my last fall (at a walk) I NEED help mounting and dismounting getting my right leg over the cantle of the saddle. Without that help I would not be able to get on or off the horse.
I have no doubt that you will get better soon, as long as you listen to your body and practice patience. Since you have a good relationship with your horse you might want to verbally explain to him why you can’t ride quite as well for a while. You might want to update your horse verbally everytime you ride, because believe me once a horse KNOWS that you can ride it can be difficult for them to realize that you just cannot ride like that for a while.
Like the first times I rode after the drunk driver plowed head on into my little car. My horses heard me, I got on, and all my horses did was “say” “you can do this little bit more, I have FAITH in you, you can do it!” as I was totally collapsed on the horse. My first horse, after I told him I could not go beyond a walk, when 10 minutes had passed decided to prove to me that I could still handle trotting–uh, sorry Hat Tricks, this will not work.
This is why I decided to stop buying horses and go to taking riding lessons on lesson horses, but then my problems are incurable (MS). At least the lesson horses, used for beginning riders, DO believe me when I tell them I just cannot do stuff.
You will heal given time and sanity, thank goodness. I’d hate to lose you on this Forum!