The Reviver, what it is and how it works. Ageing is accompanied by major changes in body composition which can result in a progressive decrease in body mass strength and quality. These in turn are directly linked to reduced mobility which in turn reduces independence and quality of life. The Reviver makes use of gravity to stimulate the autonomous nervous system This is the part of the body which regulates the key involuntary bodily functions such as the heart muscle, to heal, strengthen and tone the body in a slow uniform and radial wavelike motion.