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Spanish trot is one of the principal low airs of the haut école when exhibited in the circus. For the scientific equitation, it is a valuable gymnastic exercise for developing the horse's muscular energy, upon which it makes very great demands.

It is, like the piaffer and the passage, the manifestation of perfect diagonal action. It differs, however, from the piaffer and the passage, in that, in these two airs of manege, the knees are flexed, while, in the Spanish trot, as in the Spanish walk, the fore legs are fully extended, held in this position for an instant of inactivity, and then made to gain ground forward. The impulse for each step is given by the diagonal hind leg, which rises at the same time with the fore leg on the other side, and is held inactive for the same period. In other words, diagonal bipeds are raised, hang for a moment in the air with the fore leg extended, and then are set down together a step in advance. (Figures 32, 33.)

All the masters of the scientific equitation have agreed that the Spanish trot is next in sequence to the Spanish walk. Baucher and Fillis teach the progression: Spanish walk, Spanish trot, passage, piaffer. I, on the other hand, almost reverse this