Western pleasure is a western style competition at horse shows that evaluates horses on manners and suitability of the horse for a relaxed and slow but collected gait cadence, along with calm and responsive disposition. The horse is to appear to be a "pleasure" to ride, smooth-moving and very comfortable. Most light horse breeds in the United States and Canada may compete in western pleasure classes, either in open competition or at shows limited to a single breed. However, horse conformation and temperament play a role in this event, and hence animals of stock horse breeds that are calm, quiet, have collected, soft gaits and the strong muscling required to sustain slow, controlled movement are the most competitive.