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The trot (two beats) with head and next extended, mouth closed (not tied), accepting contact created by the leg. Good horizontal engagement of the hind near leg and extension of the outside shoulder, humerus, and foreleg. The horse demonstrates advance-level contact with reserve energy. The rider demonstrates a correct design of position on the flat, including angles at the ankle, knee, and hip. (Anne Kursinski, rider, Reinhold Tigges, photographer) Schooling and Riding the Sport Horse, UVA Press 2016 page 98