When I am riding Joe in the dressage arena at the Equestrian Park down the road he gets really tense and refuses to listen to my leg aids. I manage to get his walk relaxed and collected but when its time to trot, he throws a tantrum and trys to canter, which results in me pulling on his mouth, leaning back and trying to get him to trot, when he finally trots he does it on the spot - and I allow him to go forward with my hand/legs and he still doesn't trot he just trys to canter.
This has been happening more and more, and I am lost at what to do. I once had a lesson with him and he was like that, and they were saying stop holding on to his mouth and let him move forward, but when I allow forward movement he chucks up his head and starts to canter, thus ignoring any of my aids.
We got his back checked so it's not a pain issue, and I am so confused at what exercises I can do with him when he is like this. I have tried just letting him canter but being a TB he has so much natural fitness it is so exhausting.. I also got told to get off and lunge him, but that also didn't make a difference.
Could it just be a freshness issue, or maybe he's tense?
If he is tense, how do I ride him to make him more relaxed?