The Stair Stepper provides two exercise positions which deliver the cardiovascular benefits of steeping or stair climbing motion and the waist, back, and hip stretching benefits of a rotator . The exercise completely avoids impact stress on feet, hips and lower back. The Stair Stepper improves both cardiovascular fitness and flexibility.
The Twister is a close relative of the Sitting Rotator producing the same benefits in stretching the internal and external obliques and adding emphasis on the abdominal and extensor muscles of the spine.
Developing strengthens of lumber and abdominal muscles, improving the flexibility and agility of spine and hip joints, and shaping figure. It can relax lumber muscles and improve the blood and Qi circulation, Strengthen the ability of waist and kidney when you rotate waist to a large extent.