Have you ever been overwhelmed with all of the training aids offered? German martingales, running martingales, and draw reins? What all do they do and would your horse benefit from one? These training aids in general teach a horse to keep his head down. By having a release at a lower point rather than a higher point the horse learns to keep his head down which the goal of is head being down is that he is round in the back and driving from the hind end, or in other words collected. Each of these devices have different purposes, if you don’t know how to use one and think you horse might need one, I would highly suggest finding someone who does know how to use these devices and how to fit them correctly. By incorrectly using one of these aids you may be undoing more than helping your horse.