How are you conditioning your horse?

I barrel race and well we try not to drill our horses on the barrels every day all day. But we do ride 7 days a week each for about 1 1/2 each. And we ride them in the mountains across the rode from us. And we walk, trot, lope them up the hill. Its good for them and gets them conditioned and in shape fast. But when we do work them on the barrels we usually walk a few, trot, and lope them. Also do alot of stations to get them flexing.