Jacki Sorensen (born Jacqueline Faye Mills; December 10, 1942) is the American originator of aerobic dancing, popularly known as aerobics. Inspired by Dr. Kenneth H. Cooper's 1968 book on aerobic exercise, she created for women an aerobic dance routine to music in 1969 in Puerto Rico, teaching U.S. Air Force wives. She expanded this concept into a teaching method and studio franchise, Aerobic Dancing Inc., that rose to 1,500 locations and 4,000 instructors teaching 170,000 students in 1981 at its peak.