Went out and did it again today. It actually relieved my stiffness! And I actually was able to stay with him instead of going forward, or being left behind. I need to get back into some jumping lessons - he likes it too much to do it for giggles.
It's odd... I can work him over jumps and in a traditional frame, and after that, all he wants to do is put his head down and go pleasure LOL, I think I found a new warm up routine for shows. Certainly would get that extra energy out!
I was able to match his stamina today. He actually almost broke a sweat and was all veiny.