ARM (leading arm): This arm has a real important job. It’s the arm that takes the horse’s head around one way or another. Many people use the term “leading rein,” or “direct rein,” but really, it’s the arm that does the leading. This arm provides the horse with the feel of whichever direction you intend for him to go — and that’s if you’re on the ground or on his back. It’s real important to understand the function of this arm and how it works with the holding arm, because it’s connected to the feel and life in your whole body, and where you’re wanting that horse to go. Understanding how to use this arm to get feel applied in a way that the horse can understand fits right in with the basics, on the start.