Pilates Reformer classes are done solely on the Reformer. This is probably the most well-known piece of Pilates equipment. The Reformer is a very versatile piece of equipment because you lay, sit, kneel, and stand on the moving carriage. The carriage moves within the frame of the reformer and there are five springs for varying degrees of tension. The Reformer helps us improve strength, flexibility, balance, coordination, and range of motion. Joseph Pilates would say the individual will “reform” one’s body doing his exercises.