Diagonal Advanced Placement

Credit: Courtesy, Janet “Dolly” Hannon This horse is displaying articulation of the joints in his hindquarters and legs. This is an example of positive diagonal advanced placement (DAP).
Theory

Dressage Terminology Explained: “Quick Behind”

USEF 'S' dressage judge Janet "Dolly" Hannon explains what it means for a horse to be "quick behind" and why this quality is important in developing dressage horses.