Dressage Terminology

Cadence—The hind legs must "swing through" and engage well
underneath the horse. The moment of suspension is more clearly
defined.
Collection—When a horse is working in collection the
quarters take more of the load. The haunches (hip and stifle
joints) are flexing more and the hind legs step more under the
horse's center of balance. This lightens the forehand and allows
greater freedom of movement. The strides become shorter without
losing energy and activity. The horse looks and feels more
"uphill." In the trot as well as in the canter, the impulsion
needs to be fully maintained, rendering these gaits more
expressive and cadenced.
The horse's anatomy is such that it carries most of his own
weight on the forehand. This situation is adversely effected by
the rider's position directly behind the shoulders. Therefore,
it is also in the interest of soundness and safety of the
footfalls if the hindquarters are induced to carry more of the
weight. Consequently, it is advantageous for every horse to go
in a certain measure of collection.
Contact—A soft, steady connection between the rider's
hand and the horse's mouth. A correct, steady contact allows the
horse to find it's balance under the rider and find a rhythm in
each gait. Contact must never be obtained by pulling back with
the reins. It must result from the correct development of the
pushing powers of the horse. The discreetly driving aids of the
rider cause the horse to step into the hands with confidence.
Elevation —Relative elevation is relative to the
horse's ability to collect at any particular stage of his
training according to his conformation.
Impulsion —The energy created by the hind legs
transmitted into the gaits and into every aspect of the forward
movement. Impulsion is the result of the correct influence of
the rider, utilizing the natural gaits of the horse and
combining them with relaxation, and the development of the
horse's pushing power and throughness.
Rhythm—The regularity and the purity of the steps or
strides in each gait, covering equal distance and of equal
duration. The metronomic "beat" of the horse's footfalls. It
should not vary.
Rhythm and Regularity —Rhythm and regularity have to
be maintained on straight lines, in all bending and/or lateral
work, and during transitions. If an exercise or a movement is
not regular it cannot be rated good. A training exercise is
non-productive if it causes irregularity.
Relaxation —Relaxation has been achieved when the
horse is willing to stretch his neck forward and down in all
three gaits (allowing the horse to chew the reins out of the
rider's hands). A relaxed horse moves with a swinging back and
in a natural, regular rhythm without hurrying. The horse accepts
the driving aids and allows a supple rider to sit comfortably.
Straightness—In a straight horse the pushing powers
work directly towards the horse's center of balance. The
forehand is in line with its hindquarters allowing the horse's
longitudinal axis to follow the straight or curved line of the
track. The rider's restraining aids will then pass through the
horse correctly, via the horse's mouth, the poll, the neck, and
the back through to the quarters and influence both hind legs
equally.
Submission—The horse's willingness to conform to
directions from the rider.
Suppleness —The horse's body is free of tension. He
looks dimensional with clear muscular definition.
Tempo—The rate of repetition of the rhythm. Ideally,
it appears easy and without tension.
Throughness—Throughness is the quality that allows the
horse to move with relaxation and obedience equally in both
directions, accepting easily the forward or sideways driving as
well as the restraining aids. Throughness is the key
characteristic of a correctly trained horse.
Sources: 1995 USDF Manual; 1995-1998 USDF instructor
pre-certification materials.