Example of medieval saddle
With the invention of the solid tree, the practicality of the saddle increased. The tree helped accomplish many things. It helped to relieve pressure on the horse's spine, and distributed a rider's weight more evenly across a horse's back. Instead of forming intense pressure points on a horse's back, riders could make their mounts more comfortable, reducing the likelihood of soreness, and extending the horse's use. The solid tree also allowed additions such as the pommel (raised front of saddle) and the cantle (back of the saddle) to further stabilize the rider and help prevent him from falling off.
Western saddle and roping
Adjustments made to the pommel and cantle of different saddles led to the development of the two types of saddles we know today: English and Western. The Western saddle includes a horn, which is used in conjunction with a lasso, or rope, to catch and tie livestock. English saddles come in a variety of different types. Specialized jumping saddles include angled flaps to help a rider lean her weight forward when going over jumps or traveling quickly. Racing saddles are small, light saddles designed to place as little weight as possible on the back of the horse, and help the jockey to lean forward and balance his weight in short stirrups. Due to their specialized nature, different saddles are an essential element of nearly all equestrian activities.