The running martingale consists of a strap which is attached to the girth and passes between the horse’s front legs before dividing into two pieces. At the end of each of these straps is a small metal ring through which the reins pass.
When the horse raises its head above the desired point, the running martingale adds leverage through the reins to the bit on the bars of the horse’s mouth. The leverage created by this pressure encourages the horse to lower its head. A running martingale provides more freedom for the horse than a standing martingale, as the rider can release pressure as soon as the desired result is achieved.