The type of spring that is used on Pilates equipment is called a “tension/extension spring”. When this type of spring is stretched from its resting position, it exerts an opposing force proportional to its change in length. In other words, the more you stretch a spring, the more opposing force it provides.
“In Pilates, sometimes less springs will translate to more load on the muscles and vice versa. For example, when doing the Side Split on the Reformer, one light spring means to a lot of load on the hip adductors (assuming the exercise is executed with the utmost precision and quality). If extra load is added, not only will the load on the hip adductors decrease, at some point, more work will transfer to the hip abductors.” Rael Isacowitz
Click the photo to read the full article by Rael Isacowitz, MA.
Rael has been practicing Pilates for more than 30 years and is recognized internationally as an expert in the field. In 1989, Rael founded BASI Pilates®, a comprehensive Pilates education organization represented throughout the world.
“Spring tension will also allow for there to be tension through the full joint range, and on both the concentric and eccentric phases of the movement. In addition, unlike traditional weight training, some exercises can actually be made more challenging by decreasing the spring tension on the Reformer, rather than continually increasing it.” Sarah Baker
Click the photo to read the full article by Sara Baker, PT, MS, OCS
Sarah is president of Inspire Health, Atlanta, Ga, an organization providing physical therapy, Pilates, and wellness services with two locations in the Atlanta area. Baker received a bachelor of science in cellular biology from the University of Georgia, and a master of science in physical therapy from the University of Alabama at Birmingham. She specializes in spinal conditions and neuromuscular re-education. Inspire Health is a Merrithew Licensed Training Center and Baker is a STOTT PILATES Rehab Instructor Trainer.