See the diagram to the left to see how to ride the exercise in trot, focusing on those tight turns and getting your horse bending around your leg. I also use this exercises as a warm up in walk getting Dante moving correctly and working forward from my leg. Below to the right, In canter I rode this exercise, with difficulty at first but as you ride it more frequent your horse has to wait for your aids through out.
Below I have added in 3 additional patterns that you can ride using the zig-zag exercise. If you are riding circles s
very interesting subject , outstanding post.