TRAILING – 1. In half-pass and leg-yield, refers to lack of parallelism to the long axis of the arena (as in trailing haunches).
2. The hind legs operating too far behind the horse, which favors pushing at the expense of carrying, especially in the lengthened, medium and extended paces (as in trailing hind legs).
Full glossary: http://bit.ly/2019USDFGlossary
