Which type of martingale is often used in addition to a breastplate to help control the horse's head?

The standing martingale is a type of martingale that is commonly used to help keep a horse's head in a controlled position, especially when combined with a breastplate. This device attaches to the girth and connects to the horse's noseband, providing a direct means to limit the horse's head movement both upward and forward without restricting its ability to comfortably perform.

While the running martingale is designed to allow for greater head freedom and can help prevent a horse from raising its head too high, it is primarily used in scenarios where the horse is more inclined to throw its head up, making it less effective in the same way as a standing martingale. Draw reins and lever reins serve a different purpose as they are used to encourage the horse to work in an outline or flex at the poll, thus affecting its head position differently than a standing martingale would. The standing martingale’s specific design makes it particularly useful for maintaining a desired head position while supporting the horse's overall balance and control.