Human beings can suffer from both physical and mental fatigue. The therapy has been designed based on a "stiffness feeling" as physical fatigue, and now the stress sensor, senses the degree of "stress" i.e. mental fatigue.The massage lounger's massage promotes relaxation according to the stress level. The HEC-DR8700 massage lounger offers treatment of both the mental and physical aspects through the stiffness sensor and stress sensor working together.Sanyo massage loungers are closer to the techniques of a professional masseur than ever before.Zero-Gravity PositionIn the Zero Gravity position, the chair maintains support to the back while the seat adjusts to the optimum 30° angle and footrest elevates the legs. This position is most beneficial, as it relieves stress on the back and allows oxygen and blood to flow more freely throughout the body.Once in the Zero Gravity position, exclusive GK Rollers emulate the “grasping and kneading” of a live massage. The thumb-shaped jointed rollers