requires the horse to lengthen his frame and stride while increasing the suspension between footfalls

EXTENSION/EXTENDED (WALK, TROT, OR CANTER) At trot and canter, a pace that shows maximum length of stride, frame, and phase of suspension. The uphill balance is greater than in the lengthening pace. The tempo remains nearly the same as in the collected pace. At walk, a pace with maximum length of stride and frame, and showing the natural longitudinal oscillation of the neck (while still remaining on contact). The hind feet touch the ground clearly in front of the prints of the forefeet.