The reformer was invented by Pilates founder Joseph Pilates. It is a bed-like frame with a flat platform on it, called the carriage, which rolls back and forth on wheels within the frame. The carriage is attached to one end of the reformer by a set of springs.
Springs provide choices of differing levels of resistance as the carriage is pushed or pulled along the frame.
The carriage has shoulder blocks on it that keep practitioners from sliding off the end of the reformer as they push or pull the carriage.
At the spring end of the reformer, there is an adjustable bar called a footbar. The footbar can be used by the feet or hands as a practitioner moves the carriage. The reformer also has long straps with handles on them that are attached to the top end of the frame.
They can be pulled with legs or arms to move the carriage as well. Body weight and resistance of the springs are what make the carriage more or less difficult to move. Reformers parts are adjustable for differing body sizes and different levels of skill.
How a Reformer Is Used
A wide variety of exercises are done on the reformer to promote length, strength, flexibility, and balance.1
Most Pilates reformer exercises have to do with pushing or pulling the carriage or holding the carriage steady during an exercise as it is pulled on by the springs.
One of the best things about the reformer is its versatility. Exercises can be done lying down, sitting, standing, pulling the straps, pushing the footbar, perched on the footbar, perched on the shoulder blocks, with additional equipment, upside down, sideways, and all kinds of variations.
The reformer can train many parts and dynamics of the body in many different ways with just one relatively sleek piece of equipment.
There are many, many reformer exercises, including those for beginners and those that challenge the most advanced practitioners. For example, there are beginner Pilates reformer workouts and intermediate Pilates reformer rowing exercise workouts.