Originally Posted by SorrelHorse
Okay, thanks mildot! Misunderstood what you guys were saying. I think I'm going to try sitting the trot next time, especially since I'm horrible with diagonals and it will be easier for me if I only had to rise on that one circle.
They don't mark you down in dressage for being on the wrong diagonal ;) I'm surprised no one mentioned this so far. The reason the correct diagonal is important in dressage is because posting on the incorrect diagonal may make the horse appear uneven (which you can be marked down for). But if you have a horse with a steady trot you can post on any diagonal you like (or every diagonal you like; just don't stare down intently trying to figure out your diagonal, you'll probably get marked off for that).
Training Level:* "The purpose of the Training Level Dressage Tests is to confirm that the horse's muscles are supple and loose, and that it moves freely forward in a clear and steady rhythm, accepting contact with the bit."* Canter work on 20 m circles is added at this level.* Either sitting or rising trot may be used when trot work is required.* The horse is also asked to stretch down at the trot, and make changes of bend at the trot rather than going through the walk.
There is really no reason to sit at this level as contact is required but not collection, sitting is a more leveraged position and unless you are really strong in your position and able to allow your horse to go, you will actually impede the "move freely forward" and could get marked down for interfering with your horse.