What does it mean to release over a fence in hunt seat riding?

The release in hunt seat riding refers to the specific way the rider's hands give with the horse's neck and head through the jumping arc, allowing the horse to use its neck freely as a balancing tool during takeoff, in the air, and on landing — a critical technical element of hunt seat jumping that determines both the safety and the style of the horse's jumping effort. As a horse jumps, it uses its neck in a characteristic forward-and-downward arc — stretching its neck down and forward at takeoff to help project its hindquarters upward, and again on landing to help balance the descent. A rider who does not release — who maintains fixed hands or pulls back against the horse's mouth during this neck movement — forces the horse to fight the rein restriction during the most athletically demanding moment of the jump, which reduces the horse's ability to round over the fence, contributes to knocking rails, and over time creates tension and resistance about jumping. There are several specific types of release used in hunt seat riding at different levels of training. The crest release places the hands on the horse's neck above the crest — literally pressing the knuckles into the horse's mane — and is used by developing riders who are not yet able to maintain an independent position without the additional security of the neck contact. The automatic release is the classical hunt seat release in which the hands follow the horse's mouth through the jumping arc without any contact with the neck, maintaining a soft elastic rein from the bit to the elbow through the entire jump — this is the release of the classical hunt seat position and the one that equitation judges evaluate in advanced riders. The long crest release extends the hands further up the neck for horses that need more rein freedom than the automatic release provides.