Quarter Horses are gentle, calm, willing to please, and the pride and joy of America. They don't understand why their riders are hurting them, even though they are doing what is asked of them. Some riders use leverage devices like draw reins through leverage bits to artificially slow the Quarter Horses' natural gait, the sole purpose of which is to make the horse easier and smoother to ride for humans. This combined method of leverage can place about 40 pounds of pressure to the horse's tongue and lower jaw, interferes with natural balance, the nuchal ligament of the neck, and restricts airways.