 Tests may be as simple as jogging in a circle or backing up, or as complex as a full reining pattern, and may include elements such as transitions from halt to lope or lope to halt, sliding stops, a figure-8 at the lope with simple or flying change of lead, serpentines at the lope with flying changes, the rein back, a 360-degree or greater spin or pivot, and the rollback.Riders must use a western saddle and a curb bit, and may only use one hand to hold the reins while riding.Two hands are allowed if the horse is ridden in a snaffle bit or hackamore, which are only permitted for use on "junior" horses, defined differently by various breed associations, but usually referring to horses four or five years of age and younger.