Rollkur, LDR (low, deep, round) and hyperflexion all take a heavy toll on the horse. They affect the poll, jaw, tongue, bars, breathing, the delicate hyoid bone, swallowing, and musculature, as well as disconnecting the
Using tight reins and force will never produce a comfortable, self-driven, happy horse. It will only cause pain, discomfort, and difficulty. Self-carriage has no shortcut, so be kind, and remember that your pony is your friend above everything else.