Rollkur , now officially known as "hyperflexion of the neck," is a highly controversial training technique use by some dressage riders today. It was, and is still, used in other equestrian disciplines, most notably show jumping, before being adopted by some well-known dressage riders. However, it is not an old theory in dressage, either: Francois Baucher trained a similar method, although he did all his severe flexing at the halt, and in addition he connected the posture of the hind legs to the mix.