The Reformer is one of the best known and most used pieces of Pilates Apparatus (equipment). Joseph Pilates designed and built the first Reformers and used a Reformer in his studio until his death in 1967. The Reformer is used to assist Pilates students in the exercises. It consists of a platform bed on a frame (generally 7 feet in length and about 2.5 feet wide), a set of risers with pulleys and ropes attached, a footbed, and a sliding carriage which attaches to the springs and gear system. The carriage also has a headrest and shoulder blocks. The springs allow for heavy or light resistance.