Qigong (alternatively spelled chi gung or chi kung) is a form of gentle exercise composed of movements that are repeated a number of times, often stretching the body, increasing fluid movement (blood, synovial and lymph) and building awareness of how the body moves through space. The internal movements also differentiate qigong from almost every other form of exercise in the West that often emphasizes prolonged cardiovascular movements (such as in running and biking) or that focus on muscular strength training (weightlifting). For most people, the first and foremost benefit of qigong lies in the relief or prevention of chronic health problems. The range of maladies that have been helped by qigong in China include cancer, internal organ ailments, poor circulation, nerve pain, back and joint problems and general physical disease.