Kenneth H. Cooper, M.D., MPH, is widely recognized as the world's leading authority on preventive medicine and as the man who started a worldwide fitness revolution with his international bestseller Aerobics. Now in his seventies, Dr. Ken Cooper is a testament to the benefits of lifelong fitness, remaining an avid skier and competitive race-walker. In addition to his work at the world-renowned Cooper Clinic and Cooper Aerobics Center in Dallas, he is a nationally syndicated radio talk-show host and spokesperson for the "no trans fat" movement. The Coopers' research arm, the Cooper Institute, continues its work investigating how preventive medicine can help us lead longer, healthier lives. Tyler C. Cooper, M.D., MPH, is a graduate of the University of Texas Medical School, San Antonio, and the Harvard School of Public Health. He is a preventive medicine specialist, an athlete, and the founder of Cooper Ventures, which strives to help people incorporate healthy living into every aspect of their lives. Doctors Ken and Tyler Cooper both live in Dallas. William Proctor has worked on twelve books with Dr. Ken Cooper, including the New York Timesbestseller Controlling Cholesteroland Controlling Cholesterol the Natural Way.