Rollkur (hyperflexion of the horse's neck) used in competitive dressage training remains one of the most debated and scientifically-examined welfare controversies in equestrian sport.
The rollkur controversy highlights tensions between competitive success, traditional training practices, and evidence-based welfare standards in elite equestrian sport. The welfare evidence against sustained rollkur is robust: physiological stress indicators are consistently elevated, physical airway compromise is documented, and behavioral signs of distress during training are observable. The sport's governing body has struggled to effectively regulate against it because enforcement during training sessions is difficult and the line between permitted deep work and prohibited rollkur is contested. From a welfare perspective, the precautionary principle argues against techniques that consistently produce physiological and behavioral stress markers, especially when effective alternatives exist. The public visibility of elite dressage gives this debate cultural significance beyond the horses directly affected.