The movement of Andalusian horses is extended, elevated, cadenced and harmonious, with a balance of roundness and forward movement. Poor elevation, irregular tempo, and excessive winging (sideways movement of the legs from the knee down) are discouraged by breed registry standards. Andalusians are known for their agility and their ability to learn difficult moves quickly, such as advanced collection and turns on the haunches.[6] A 2001 study compared the kinematic characteristics of Andalusian, Arabian and Anglo-Arabian horses while moving at the trot. Andalusians were found to overtrack less (the degree to which the hind foot lands ahead of the front hoof print) but also exhibit greater flexing of both fore and hind joints, movement consistent with the more elevated way of going typically found in this breed. The authors of the study theorized that these characteristics of the breed's trot may contribute to their success as a riding and dressage horse.[15]