Side reins are equipment used when longeing a horse, running from the bit of the bridle to the saddle or surcingle. As a horse training tool, they encourage flexion and softness in the horse's mouth. For longe line work with a rider up who does not carry ordinary riding reins, they help calm and settle the animal. However, they are a tool best used by experienced handlers; used improperly they may unduly restrict the horse's movement or cause an accident.
Side reins used on an equestrian vaulting horse.
A set of side reins with elastic, buckle adjustment
The sliding side rein. These are adjusted with the side reins attaching between the legs.
Longeing or lungeing is a technique for training and exercising horses. It is also a critical component of the sport of equestrian vaulting.
A horse in training for equestrian vaulting at the halt on a longe line.
17th century copperplate engraving of a horse and rider being worked on a longe line
A horse and vaulter on a longe line with handler on the ground. (In vaulting, the handler is called a longeur.) The longe is also used to develop a person's equestrian skills.
Longe cavesson fitted with a bridle. Also note front leg wraps and that the stirrups are put up to keep them from hitting the horse's side.
