Sorry, I missed the part when you asked about rehab.
I am sure your vet will give you a program.
In my case, horse was in stall rest. I had to wrap his leg daily, was a process of poutice and DSMO, wet strip of a grocery paper bag, plastic, then standing wraps, needed wrapped and unwrapped half the day, the barn worker was a jewel and unwrapped him in the AM, I wrapped him in the PM.
This was almost a year ago, so cant remember details, but I think this was for about 6 weeks. I think I was able to ride at a WALK for awhile daily, NO tight turns, was basically to give him some controlled exercise. We have a large indoor arena.
I mostly just hopped on him bareback, once it got decent outside, I was allowed to do road rides, was better since was able to walk in straight lines, horse was going crazy being on stall rest, so got some ace and gave him 1cc before those rides to keep it very relaxed.
I “think” it was 3-4 mos before it “healed”, also, I took horse to U of I (hour away) for shock wave about every three weeks. Once Vet deemed it healed, was able to do trot sets, trot diagonal in arena, walk short sides, road riding was also exteneded. Was Spring at this point, so sectioned off a little pen on grass, aced him, then let him out, pen wasn’t much bigger than a round pen, he just cared about grazing, so never got hyped.
Mayb a month longer, put him on an unused pasture, was pretty flat, ground wasn’t too chewed up, w/a very old horse. Got ok to ride normal, but NO tight turns, horse can NOT be in sucking mud, so must be stalled or dry lotted after it rains. Once the rainy season is over, I do put him in pasture 24/7, put in stall only if it rains enough for sucking mud. He needs to be on EVEN ground as much as possible, so when the pasture got really rough from hooves, I did bring him in even when it was icy. So, the thing to watch is very rough and chewed up ground and MUD. Other than that, he should be able to stay outside,
I had ridden my horse, all was fine, did a solo w/my dog, rode all gaits, wasn’t a crazy ride, but wasn’t a pokey one either. Horse was TOTALLY sound. Next day, went to get my horse from pasture, fetlock was swollen like an orange. Vet thinks took a “bad step”. That was mid Nov 2012, horse was deemed able to be ridden “normal” Mid May 2013, but I needed to be SMART in how I rode him.
So, while days of galloping around are probably done, it is prob me that mentally has a longer long term issue w/his injury. When I took him to SR for a trail ride, he wanted to GO, I did let him blow up a few hills, but mostly held him a little back and cut our ride shorter than normal.
It was his “first off site” trail ride of the year, we have had a HORRID winter, so didn’t have a lot of chances, were in sand, so he really isn’t in shape yet, so again, his injury isn’t the only reason of the limits of that ride.
He is my 1st horse and I will keep him his entire life, want to keep him happy and sound. I was lucky to be able to buy another much younger horse (4 yrs old), so I am hoping having each other will allow both to have more off time, I ride 5-6 times a week, so I really have put a LOT of miles on my old horse, had him for almost 12 years.
Probably in the next year or two, even w/out his injury, I prob would have needed to reduce his riding, simply for all his wear and tear, has arthritis and bone spurs, found in his xrays during his injury process.
It sucks, but like everything, as things get older, limitations will come up, he will recover from this and if rehab is done slow, you will still have a lot of fun on your boy 
Good Luck!! Update after the vet comes
