The running martingale, sometimes referred to as "rings" or "ring martingale" is probably the most widely used design today. It passes from the girth up the centre of the horse's chest, and the reins are passed through the ring at the end of each strap. A neck strap prevents the martingale from swinging about.

When correctly fitted, the martingale exerts downward pressure on the mouth if the horse lifts it's head above the angle of control. It's effect is most acute when used in conjuction with a jointed bit.

• Always use Rein stoppers when using your martingale