I have competed a QH mare
for many years. Mostly CTR but some endurance also. She is VERY laid
back and was most happy to poke along as slow as possible. There is
hope! LOL. It took a bit of work to get a good trot on her. She wanted
to do the QH jog or canter. In training with friends, I simply would
not let her canter to keep up. It took a full season but she figured
out that the only way she could stay with her buddies was stretch her
legs and trot. She now has an amazing big Arab trot and can keep up
with the best of them. And as she got fit, she no longer minded doing
the speed and distance at all.
I've found a good walk a lot harder to develop then a good trot.