Once your horse has learned to target you can train the 'cue' for stretching.
The simplest way to teach your horse to work long and low without gadgets is by using a target. In this lesson, Jenku builds on the previous targeting work done over the stable door, by taking the horse into the arena and getting him to target a cone on the ground. Herman quickly learns that interfering with the human gives him no reward, but that Jenku’s finger pointed to the ground is the cue he needs to follow.
If your horse gets stuck, lower your criteria and bring the cone up to him to remind him of the task at hand. Light downward pressure on the halter will also provide him with the direct feedback he needs to focus on the cone. Consistent and direct feedback sets the horse up for success and enables him to relax and learn at the same time. Long and low work will help Herman work through his back and carry himself more without relying on his rider.