I have had quite a bit of trouble with this but for me it helps to lean back a bit and only use the amount of leg needed, if your horse gets a fast canter and your afraid to take some leg off bc of breaking the canter, I would trust taking off some leg And then pick up your hands and sit back while adding back some leg back. Hope this helps
(continuation of my previous comment)
When I ask for the canter over the 1 set of poles, and trot straight after, then he is learning that he might stop soon after the canter as well and then bring himself back, preparing for the downward transition.
All of the trot-canter and canter-trot transitions really help to build the strength needed for balance in the canter. So even if that is all you do, it will help.
Transitions are something that you can do under saddle. Although the excersise that I do on the lunge is probably better without a rider. He needs to find his feet himself and also it would be easier without having to balance for a rider as well.
I hope you are successful with your horse. 😁
I've I struggled sooo bad with my Thoroughbred. He runs and rushes really bad.
I have tried balancing him back with all my strength, tried circling him, tried transitions but he just freaked out and it was a snowball effect. He would become unbalanced, freak out, speed up, and then loose his balance more and so the cycle continued.
I have started trying to fix it on the lunge. It seems to be working so far.
I use a neck stretcher or side reins
Then on the circle, I put 4 canter poles (they can be slightly raised cos this helps him rock back instead of bulldozing over them all) on opposite sides of the circle.
The canter poles are shorter than the standard length. So like 10 feet apart or 3-3.5 steps apart. This helps him collect just a bit. If he looses engagement, I'm not too bothered cos he is cantering slowly.
I am working on his mind so that it clicks that canter doesn't mean as fast as you can go. As soon as he realizes that, then he will start to balance himself to stay slow.
Then, when actually lunging him, I asked for the canter and let him go until he starts to become unbalanced and/or looks a bit stressed, then I ask for a trot.
Trot for a circle or 2 to get him out of that 'canter' mind, and then go again.
I basically want him to be as calm as possible. That way, he learns to think and control his own body and then he can build the strength for good balance.
I also ask for the canter a couple strides before the 1 set of poles and then a trot over the 2nd set