PAINFUL MUSCULO-SKELETAL HEALTH PROBLEMS SUCH AS NOW BACK PAIN CONTRIBUTE SIGNIFICANTLY TO MORBIDITY IN THE GENERAL POPULATION AND FORM A MAJOR PART OF THE HIGH COSTS OF HEALTH CARE IN THE INDUSTRIALEZED WORLD. IRONICALLY, BACK PAIN IS VERY PREVALENT IN THE GENERAL HEALTH FOCUSED POPULATION WHO EXERCISE TO PREVENT HEALTH PROBLEMS IN THE CARDIOVASCULAR SYSTEM, AND IT IS ALSO A MAJOR PROBLEM FOR THOSE WHO TRAIN AND COMPETE AT A HIGH LEVEL IN SPORTS AND ATHLETIC EVENTS. UNTIL RECENTLY, TH