My horse speeds up before jumps?

Work with trot poles at a walk and a trot and eventually a canter. If you have a twelve inch jump surely your horse can walk over this, and just walk up to it, stop and then proceed, just take things slow to let him know it's not a big scary ghost that'll kill him. Another is get into a nice collected trot and circle right before the jump and eventually incoprate your jump into the circle.

First work with just walking poles, then go onto trotting ground poles, and put down ground lines and poles in front of the main "jump". Then move onto a higher jump and put a pole a stride before. Half halt on your way to the jump, and sit deep (or if your horse just really doesn't like people on his back, half seat, but since he was a racehorse getting off his back probably means "go faster" to him, because of the way jockeys sit), keep a tight rein, but make sure to release for the jump.

I ride a horse that begins to bolt WAYYYY befor the jump. About 5 whole strides before it. And the more you try to stop her from rushing, she just goes faster until shes galloping full speed. We fix it by placing trot poles down or always keeping her walking and troting at least 5 minutes befor we do the actual jump and it works just about every time!

I was always tought to have the last stride as a canter so this is a baffling question to me, but you could try trotting and canter poles before so that hes thinking about where to put his feet, and arrange two poles that are wide and get narrower as they get to the pole itself, to encourage him to jump in the middle.

Try getting him used to the jump before hand----walk him towards the jump and stand in front of it for a minute. You could try some trotting/canter/walking poles before you jump. Depending on your skill level, or as you get better, you could try making the jumps higher.

It sounds like he's likes to jump, which is a good thing.

Hope I helped.

Placing canter poles(or trot poles) before the jump is a great way to slow down a rusher.

Good luck!

Just a note...

If nothing else works and you can't slow her down on approach there are two things to do

1. if your far away enough to make the decision to turn then circle her and go into the jump again

2. if your too close to the jump and she rushes-your best just going with her

It's not ideal but I've had a few bad falls wrestling with horses a stride before jumps....best just to be ready and try again xx

Place trot poles in frount of the jump and gently pull back on the rains and say easy. Is your house trained to respond to the word easy.? Well if not mabey you should work with him on the word easy. Hope I was a help. (: