or stop must be very subtle. For working horses, a relaxed rein allows the animal freedom to move over rough terrain. There is some slack in the reins unless the rider needs to tell the horse to stop. For polo and polocrosse the rider holds one or two pairs of reins in one hand. Slack in the reins is not required. In English riding and other systems where the primary means of communication is light pressure between the rider's hands and the horse's mouth, light pressure is always maintained on the bit. The neck rein in English riding is used in addition to a direct rein and reinforces certain riding aids, particularly turns that require the horse to set back on its haunches, such as turns at high speeds when show jumping in a timed jump-off, or in events such as Dressage when performing a Pirouette. Many well-trained English horses seem to already know how to neck rein without being formally taught — further proof that the skill is primarily an outcome of encouraging responsiveness to the legs, weight and a light hand. Riding techniques and movements