I personally don't like side reins and such they are just tie downs and you should be trying to work with the horse yourself with transitions and such I know one fact that when I tried side reins or anything like that with phoebe she hated it completely and people told me she just had to get used to it first and she never got used to it and she went completely better without any tie downs or anything like that on her at all just my opinion on side reins anyway if it works for other people I have no problem with that but I just don't like them
I over corrected my OTTB's right lead to the point where he now prefers it. Side reins are good for helping build back muscle, but I wasn't thinking of it as a back issue. I took it from a stand point of the rear leg not being strong enough since race horses don't use it much. I used a lot of shoulder-fore and haunches in to strengthen his left rear hind leg. It took about 6 months before he was cantering as much on his right lead as he could on his left, bue eventually he balanced out. Now I can barely tell which lead he's on sometimes.