The Pilates “method,” as it is now known, is an exercise system focused on improving flexibility, strength, and body awareness, without necessarily building bulk.
The method is a series of controlled movements performed on specially designed spring-resistant exercise apparatus (the Reformer, the Cadillac, the Ladder Barrel, and the Stability Chair) or on the floor (mat work), and the sessions are supervised by specially trained instructors. Pilates is considered to be resistance exercise.
Two of the key elements of Pilates are core muscle strength and spinal alignment. The core musculature is loosely defined as the spine, abdomen, pelvis, hips, and the muscles that support these structures.