Elaine Ewing on Instagram: "Classical Pilates Helicopter Variation with Light Springs I really love to use the Gratz Arm Springs as light leg springs for anyone who needs to work with lighter tension. Sometimes I even use them myself, like I am in this video. The lighter spring can make some exercises easier, and others harder. If you find that you have to “power through” a leg springs series or have to take breaks between each exercise, a lighter spring would probably be a better option for you