Re Hills: We have a very short, very steep piece of trail. Most horses want to gallop up it - but I want to build hind end strength. My mare can walk up it and I can really feel her pushing. She can trot it, too, but it seems harder on her.
Coming down it is also a challenge, but the footing remains perfect almost all year round.
Since only two feet are on the ground at one time in the trot, I would suggest that the trot is more fittening? Opinions?