Swing Massager C12 is the result of medical and scientific research on the movement of goldfish swimming, resulting in increased stimulation to blood circulation with direct effects on muscle, nerves, back, and abdomen. It gives you a well-defined waist, firm muscles, a supple spine, and it's very helpful for people who have high cholesterol. Swing Massager is very easy-to-use, simply lie down and put your ankles on this and you are ready to go. It brings you health and a well-proportioned body without too much exercise.